Category Archives: Quality selection

　　Anti-loosening nut is a nut, which is a part that is screwed together with a bolt or a screw for tightening. It is an original part required by all production and processing equipment. Anti-loosening non standard nut is a part that tightly connects mechanical equipment together. With the help of the inner thread, anti-loosening nuts and screws of the same specifications can be connected together. The following is a detailed introduction to several methods of preventing anti-loosening nuts from slipping.However, in other words, we should know more about it. non-standard fasteners price The law of development has brought new vitality to the whole industry and revitalized the market. https://jieruifasteners.com/

　　1. Anti-loosening of equipment

　　It is to use the locking nut stopper to directly limit the relative rotation of the locking nut pair. For example, the use of tooth pins, serial wires and stop washers. Because the locking nut stopper does not have a pre-tightening force, the anti-loosening stopper can only work when the locking nut is loose and returned to the stop position. Therefore, the locking nut method does not actually prevent loosening but prevents falling.

　　2. Riveting and anti-loosening

　　After tightening, use punching, welding, bonding and other methods to make the locking nut pair lose the performance of the kinematic pair and the connection becomes an irremovable connection. The disadvantage of this method is that the bolt rod can only be used once, and it is very difficult to disassemble, and the bolt pair needs to be damaged before it can be disassembled.

　　3. Friction anti-loosening

　　It is the most widely used anti-loosening method. This method forms a positive pressure between the locking nut pairs that does not change with the external force, so as to form a friction force that can prevent the relative rotation of the locking nut pairs. This positive pressure can be achieved by axially or simultaneously pressing the locking nut pairs in two directions. For example, elastic washers, double nuts, self-locking nuts and insert locking nuts are used.

　　4. Structural anti-loosening

　　It is to apply the locking nut pair’s own structure, that is, the Tang’s locking nut anti-loosening method.

　　5. Punching edge anti-loosening

　　After the nut is tightened, the thread is destroyed by punching the end of the thread; bonding anti-loosening generally uses anaerobic adhesive to apply to the thread screw surface. After tightening the anti-loosening nut, the adhesive can solidify by itself, and the actual anti-loosening effect is better. The disadvantage of this method is that the bolt rod can only be used once, and it is very difficult to disassemble, and the bolt pair needs to be destroyed before it can be disassembled.

　　In July 2024, a news about the upgrade of the world’s largest security company to a listed company went viral on the Chinese mobile Internet, and many Chinese netizens questioned the information of a security company to become a listed company, believing that it is difficult for a security company to become a real listed company. So, is the information circulating on the Chinese Internet platform true? Is it true that any security company in the world has upgraded to a public company? What are the requirements for a security company to become a public company?It is strictly required by such a standard, bodyguard Only with today’s development scale, can we have the proud momentum to crush our competitors. http://huanyubodyguard.com/

　　The listing of the world’s largest security company, reported on the Chinese mobile Internet, could not be confirmed. So far, there are not many international rumors that security companies have become listed companies, and a security company needs to have many listing conditions to become a listed company. Most Chinese security companies are private, small, medium and micro enterprises, which do not have the basic conditions of listed companies. However, this type of security enterprises have indeed played a positive role in promoting the progress of social security. For example, the Huanyu Brothers bodyguard Company in Shenzhen, China, has played a good role in public security supervision in China and countries with many overseas Chinese, and has brought security protection to overseas Chinese groups around the world.

　　Whether a security company can go public and become a world-class listed company depends on comprehensive conditions. However, the existence of security service companies around the world has contributed greatly to world peace. Since all countries have security service companies, the kidnapping and terrorist attacks of rich people, politicians, stars, network celebrities, celebrities and rich people are decreasing year by year. With private bodyguards in security companies providing security protection services for world celebrities, the security crisis of world celebrities can be lifted.

　　Selecting the right terminal connection cable is crucial for ensuring the efficiency and safety of your electrical systems. Whether you are working on a complex industrial project or a simple home wiring job, the choice of cable can significantly impact the performance and reliability of your connections. In this guide, we will explore the key factors to consider when choosing terminal connection cables, the different types available, and practical tips to make an informed decision.Even if there are obstacles to moving forward, D-SUB connector We should also persevere, forge ahead bravely, cut waves in the sea of the market, hang on to Yun Fan and strive for the first place. https://www.xpbdz.com/

　　Understanding Terminal Connection Cables

　　Terminal connection cables are designed to connect electrical circuits and devices securely. They are used in various applications, including industrial machinery, automotive wiring, and household electrical systems. These cables are essential for transmitting power and signals with minimal loss and interference.

　　MINI DIN8P connection to XH2.5-5P terminal connection cable

　　Key Factors to Consider

　　Application Requirements

　　Voltage and Current Ratings: Ensure the cable can handle the voltage and current levels required by your application. Using a cable with insufficient ratings can lead to overheating and potential failure.

　　Environmental Conditions: Consider the environment where the cable will be installed. Factors such as temperature, humidity, and exposure to chemicals or UV radiation can affect the cable’s performance and lifespan.

　　Flexibility and Durability: Depending on your application, you may need a cable that is highly flexible or one that can withstand mechanical stress. Choose a cable with the appropriate flexibility and durability for your needs.

　　Cable Specifications

　　Conductor Material: The most common conductor materials are copper and aluminum. Copper offers excellent conductivity and flexibility, while aluminum is lighter and more cost-effective. Select the material that best suits your application requirements.

　　Insulation Type: The insulation protects the conductor from external factors and prevents short circuits. Common insulation materials include PVC, rubber, and silicone. Choose an insulation type that matches your environmental conditions and application needs.

　　Shielding: Shielded cables are used to reduce electromagnetic interference (EMI) and ensure signal integrity. If your application is sensitive to EMI, consider using shielded cables.

　　Standards and Certifications

　　Ensure that the terminal connection cable complies with relevant industry standards and certifications. This guarantees that the cable meets safety and performance requirements. Look for certifications such as UL, CE, and ISO.

　　MINI DIN8P connection to XH2.5-5P terminal connection cable

　　Types of Terminal Connection Cables

　　1.Single-Core Cables

　　Single-core cables consist of a single conductor covered with insulation. They are used in applications where flexibility is not a primary concern, such as fixed installations in buildings.

　　2.Multi-Core Cables

　　Multi-core cables contain multiple conductors within a single sheath. They are ideal for applications requiring multiple connections in a compact form, such as control panels and automotive wiring.

　　3.Coaxial Cables

　　Coaxial cables have a central conductor surrounded by insulation, a metallic shield, and an outer insulating layer. They are used for transmitting high-frequency signals with minimal interference, such as in television and internet connections.

　　4.Twisted Pair Cables

　　Twisted pair cables consist of pairs of conductors twisted together to reduce EMI. They are commonly used in telecommunications and networking applications.

　　Practical Tips for Choosing the Right Cable

　　Assess Your Needs: Start by identifying the specific requirements of your application, including electrical load, environmental conditions, and physical constraints.

　　Consult Technical Data: Refer to the technical specifications and datasheets provided by cable manufacturers. These documents offer detailed information about the cable’s performance characteristics and suitability for different applications.

　　Seek Expert Advice: If you are unsure about the best cable for your needs, consult with an electrical engineer or a knowledgeable supplier. They can provide valuable insights and recommendations based on their expertise.

　　Consider Future Needs: When choosing a cable, consider any potential future requirements. Selecting a cable with higher ratings or additional features can save you from having to upgrade later.

　　Conclusion

　　Choosing the right terminal connection cable is essential for the success of your electrical projects. By considering factors such as application requirements, cable specifications, and industry standards, you can make an informed decision that ensures optimal performance and safety. Whether you are working on a small DIY project or a large-scale industrial installation, selecting the appropriate terminal connection cable will help you achieve reliable and efficient electrical connections.

　　What do several common ADAS functions do?After screening and investigation 360 panoramic camera factory It is likely to become a new force driving economic development. https://szdfpls.com

　　1 LKA (lane keeping assist)

　　LKA can help drivers keep their vehicles in lanes and reduce the risk of lane departure accidents caused by driver negligence or fatigue.

　　The LKA system achieves its functions by using cameras, sensors and control systems. The camera is usually installed at the front of the vehicle to capture the lane line in front of the vehicle. The sensor is responsible for monitoring the driving status and direction of the vehicle, including steering angle, vehicle speed, etc.

　　When the vehicle approaches the lane line during driving, the LKA system detects the position and shape of the lane line and makes a judgment based on the driving status and direction of the vehicle. If the system believes that the vehicle is about to deviate from the lane, it will help the driver guide the vehicle back to the normal lane by controlling the steering system.

　　2 ACC (adaptive cruise control)

　　The ACC system uses on-board sensors, including radar, laser radar, etc., to detect the vehicles and obstacles in front of the vehicle during driving, as well as the position and speed of the vehicle. The system can monitor the distance and speed of the vehicles and obstacles in front in real time, and automatically adjust the speed and driving trajectory according to the speed and driving status of the vehicle to maintain a safe distance from the vehicle in front.

　　Compared with traditional cruise control systems, adaptive cruise systems are more intelligent and flexible. Traditional cruise control systems can only drive at a preset speed and trajectory, while adaptive cruise systems can automatically adjust the speed and trajectory according to the actual situation of the vehicle and obstacles in front to maintain a safe distance.

　　In addition, the adaptive cruise system can also automatically adjust the vehicle¨s speed and trajectory according to the speed and driving status of the vehicle and obstacles in front to maintain the relative position with the vehicle in front. This automatic adjustment function can help drivers drive the vehicle more easily while improving driving comfort and safety.

　　3 FCW (forward collision warning)

　　The FCW system uses on-board sensors, including radar, cameras, etc., to detect the distance and relative speed between the obstacle in front of the vehicle and the vehicle. The system monitors the situation in front of the vehicle in real time. When a collision risk is detected, it will issue a warning to remind the driver to take timely measures.

　　The warning methods of the FCW system usually include sound warnings, vibration seats or steering wheels, etc. The level and method of the warning will vary depending on the size and specific circumstances of the collision risk. If the driver does not take timely measures, the FCW system may also automatically intervene in the vehicle¨s braking system to avoid or mitigate the collision.

　　Collision prevention systems are usually combined with other driver assistance technologies such as lane departure warning systems and adaptive cruise control systems to provide drivers with more comprehensive and reliable driving safety protection.

　　4 AEB (advanced/automatic emergency braking)

　　The implementation of the AEB system function requires the cooperation of multiple sensors and controllers. The sensor in front of the vehicle (such as radar, camera or laser) detects obstacles in front. If there is a risk of collision based on speed and distance analysis, the system will warn the driver through warning lights, alarm sounds, etc. If the driver does not brake after the warning, or the system determines that the driver cannot brake in time after sensing the signal, the AEB system will actively intervene and brake when the threshold is exceeded.

　　5 IPA (intelligent parking assist)

　　IPA integrates sensors, cameras and computer algorithms to realize functions such as automatic parking space identification and automatic parking.

　　In actual use, the driver only needs to press the start button of IPA intelligent parking assist, and the system will automatically detect the surrounding environment and find a suitable parking space. Once a suitable parking space is found, the system automatically calculates the best parking trajectory and controls the vehicle to complete automatic parking. The whole process does not require manual operation by the driver.

　　6 BSD (blind spot detection)

　　BSD mainly detects the blind spot range of the rearview mirror through two millimeter-wave radars equipped on the rear of the vehicle. When other road users are detected in the blind spot, the driver is warned to assist driving or changing lanes.

　　7 DFM (driver fatigue monitoring)

　　DFM aims to monitor the driver¨s physiological state and driving behavior, reminding the driver to rest in time when fatigued, so as to ensure driving safety.

　　The DFM system monitors the driver¨s physiological state in real time through various sensors, such as eye closure, head position, heart rate, etc. These data can provide clues about whether the driver is fatigued. For example, when the driver¨s eyes are closed more or the head position is not correct, this may indicate that the driver is in a state of fatigue. In addition, the DFM system also monitors the driver¨s behavior patterns, such as driving speed, braking frequency, etc. These behavior patterns can also reflect the driver¨s fatigue level. For example, when the driver slows down or brakes more frequently, this may indicate that the driver is tired.

　　The DFM system uses specific algorithms and models to comprehensively analyze the driver¨s physiological and behavioral characteristics to assess the driver¨s fatigue level. These algorithms and models are usually based on machine learning and artificial intelligence technologies, and can determine whether the driver is in a state of fatigue based on the driver¨s characteristic data.

　　8 NV (night vision)

　　NV can detect obstacles and pedestrians at a farther distance than ordinary visible light, which is particularly useful in night and low-light environments. By identifying these obstacles and pedestrians, the NV night vision function can provide drivers with additional warnings, allowing them to react in advance and avoid potential dangers.

　　NV night vision can also be combined with other ADAS technologies, such as automatic emergency braking and adaptive cruise control. When the NV night vision system detects potential dangers, it can trigger these higher-level safety systems to automatically take evasive or braking measures, thereby further enhancing driving safety.

　　However, NV performance is affected by many factors such as light conditions, ambient temperature, and equipment quality. Therefore, when using NVD, it is necessary to make appropriate adjustments and use it according to actual conditions.

　　When it comes to manufacturing custom silicone parts, precision and quality are paramount. Longxiang, a leading custom silicone part supplier, excels in delivering high-precision silicone parts tailored to meet diverse industry needs. In this blog post, we’ll explore the importance of custom silicone parts, the benefits of high-precision manufacturing, and why Longxiang stands out as a top supplier.This shows that, customized silicone mould It has a strong development pulse and is an indispensable source of power for the development of the industry. https://lxsiliconeparts.com/

　　The Importance of Custom Silicone Parts

　　Custom silicone parts are essential in various industries, including automotive, medical, electronics, and consumer goods. Their versatility, durability, and resilience make them ideal for applications requiring flexibility, heat resistance, and biocompatibility. Customization allows these parts to be tailored to specific requirements, ensuring optimal performance and functionality.

　　custom silicone parts

　　Benefits of High-Precision Silicone Parts

　　Accuracy: High-precision silicone parts ensure that components fit perfectly within their intended applications, reducing the risk of malfunction or failure.

　　Consistency: Precision manufacturing guarantees that each part produced meets the same high standards, ensuring reliability across large production runs.

　　Enhanced Performance: Precise silicone parts offer better performance in demanding environments, such as extreme temperatures or high-stress conditions.

　　Cost Efficiency: While high-precision parts may have higher upfront costs, their durability and reliability can lead to long-term savings by reducing the need for frequent replacements or repairs.

　　Longxiang: Your Trusted Custom Silicone Part Supplier

　　Longxiang has established itself as a premier supplier of custom silicone parts, known for its commitment to quality and precision. Here¨s why Longxiang is the go-to choice for businesses seeking top-notch silicone components:

　　Advanced Manufacturing Capabilities

　　Longxiang utilizes state-of-the-art manufacturing technologies to produce high-precision silicone parts. Their advanced machinery and skilled workforce ensure that each part meets the exact specifications required by clients.

　　Comprehensive Customization

　　Longxiang offers extensive customization options, allowing clients to specify the exact dimensions, shapes, and properties needed for their silicone parts. This flexibility ensures that each component is perfectly suited to its intended application.

　　Strict Quality Control

　　Quality is a cornerstone of Longxiang’s manufacturing process. Rigorous quality control measures are in place at every stage of production to ensure that each silicone part meets the highest standards of precision and performance.

　　Industry Expertise

　　With years of experience in the silicone parts industry, Longxiang has the expertise to handle complex projects and deliver solutions that meet the unique needs of various industries. Their knowledge and experience ensure that clients receive the best possible products and services.

　　When it comes to the world of fasteners, non-standard options are essential for industries requiring unique solutions. Ensuring the quality of these custom non-standard fasteners is paramount to meet the specific demands of various applications. This article will explore how to guarantee the quality of non-standard fasteners, focusing on the role of suppliers like Jierui Hardware Factory, and the factors that influence the non-standard fasteners price.After screening and investigation non-standard fasteners price It is likely to become a new force driving economic development. https://jieruifasteners.com/

　　The Role of Jierui Hardware Factory

　　Jierui Hardware Factory, as a hypothetical example of a non-standard fasteners supplier, plays a crucial role in the quality assurance process:

　　Customization Expertise: With a focus on custom non-standard fasteners, Jierui Hardware Factory would have the capability to produce fasteners that meet specific industry standards or client requirements.

　　Quality Control Systems: Implementing rigorous quality control measures ensures that each batch of non-standard fasteners meets the highest quality benchmarks.

　　Materials Testing: Jierui would conduct thorough material testing to ensure the fasteners’ durability and resistance to various environmental factors.

　　Factors Influencing Non-Standard Fasteners Price

　　While quality is paramount, the price of non-standard fasteners is influenced by several factors:

　　Material Costs: The choice of material, such as stainless steel, brass, or titanium, can significantly affect the cost.

　　Complexity of Design: More complex designs requiring intricate machining or specialized tooling will increase the price.

　　Production Volume: Economies of scale can reduce the cost per unit when ordering larger quantities.

　　Customization Level: Higher levels of customization can lead to increased costs due to the need for specialized manufacturing processes.

　　Steps to Ensure Quality in Non-Standard Fasteners Supply

　　Define Specifications Clearly: Clearly outline the required dimensions, materials, tolerances, and any special treatments or coatings.

　　Choose a Reputable Supplier: Opt for suppliers like Jierui Hardware Factory with a proven track record in producing high-quality custom non-standard fasteners.

　　Request Samples: Before placing a bulk order, request samples to verify the quality and fit for your specific application.

　　Understand the Quality Assurance Process: Ensure the supplier has a robust quality assurance process in place, including third-party certifications if applicable.

　　Negotiate on Price: While considering the non-standard fasteners price, negotiate with the supplier to find a balance between cost and quality that suits your budget.

　　Regular Audits: Conduct regular audits of the supplier’s production processes to ensure ongoing compliance with quality standards.

　　Feedback Loop: Establish a feedback loop with the supplier to address any quality issues promptly and effectively.

　　Ensuring the quality of non-standard fasteners is a critical aspect of any project that requires customized solutions. By working closely with a supplier like Jierui Hardware Factory, understanding the factors that influence pricing, and following a systematic approach to quality assurance, you can ensure that your non-standard fasteners meet the stringent requirements of your applications. Remember, investing in quality not only ensures the longevity and performance of the fasteners but also contributes to the overall success and safety of your projects.

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　　1. Meeting security

　　Business leaders often hold meetings, many of which are held in high-rise buildings. Before important meetings, our bodyguards can help managers improve their work efficiency by defining boundaries in meeting spaces and public areas. During meetings, professional security personnel can monitor entry and exit points to ensure that participants are properly protected.

　　2. Business travel security

　　CEOs often need to travel on business, and some destinations usually require attention to security. Our security experts can detect potential attackers in advance and implement pre-made security plans.

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　　3. Celebrity Bodyguards

　　Actresses, writers, sports stars and many other industries who have both fame and fortune have a huge demand for personal protection.

　　4. Special Event Security

　　Whether it¨s a concert, meet-and-greet, premiere or red carpet gala, face-to-face contact with the audience is particularly dangerous for celebrities. Our special event security team detects potential threats in performance spaces and award ceremonies, allowing celebrities to ensure personal safety while enjoying their face-to-face contact with fans.

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　　5. Paparazzi Protection

　　The public likes to know what celebrities are doing at all times, which has led to the development of paparazzi and tabloids. Our celebrity bodyguards are well-trained to effectively protect celebrities’ private space and avoid being photographed by paparazzi and conflicts with them.

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　　Reversing camera is an invaluable tool for drivers. It is a good idea to use a reversing camera while driving.Without exception, vehicle camera supplier Our customers are willing to purchase their products, because high quality is the concept of their products. https://szdfpls.com

　　It can help you park safely, and its wide-angle lens allows you to see anything behind you in your rearview mirror.

　　You can also see children, trash cans, and toys. In general, using a back-up camera can also make driving easier.

　　Some cameras will even signal a warning when approaching a parked car or nearby object. Reversing cameras can help you avoid accidents and potentially save your life.

　　Silicone ice cube maker cylinder cup molds have gained popularity for their convenience, versatility, and durability. Whether you’re looking to chill your drinks, create unique ice shapes, or even freeze other liquids like juice or coffee, these molds offer an efficient solution. This blog post will explore the benefits, uses, and considerations when choosing silicone ice cube maker cylinder cup molds.It is strictly required by such a standard, customized silicone mould Only with today’s development scale, can we have the proud momentum to crush our competitors. https://lxsiliconeparts.com/

　　Why Choose Silicone Ice Cube Molds?

　　Silicone has become the go-to material for ice cube molds for several reasons:

　　Flexibility and Ease of Use: Silicone molds are flexible, making it easy to pop out ice cubes without much effort. Unlike traditional plastic molds, silicone won¨t crack or break when you try to remove the ice.

　　Durability: Silicone is a durable material that can withstand extreme temperatures, from freezing cold to boiling hot. This means you can use these molds in the freezer, microwave, or dishwasher without worrying about damage.

　　Non-Toxic and Food Safe: High-quality silicone is non-toxic, BPA-free, and food-safe. This ensures that your ice cubes are free from harmful chemicals and safe for consumption.

　　Versatility: Silicone ice cube maker cylinder cup molds can be used for more than just ice. They are perfect for freezing juice, coffee, or even creating homemade popsicles. Some creative uses include freezing herbs in olive oil or making mini ice cream bites.

　　silicone ice cube maker

　　Design and Features of Cylinder Cup Molds

　　Cylinder cup molds are particularly popular because of their unique shape and functionality:

　　Uniform Shape: The cylindrical design allows for uniform ice cubes, which not only look appealing but also melt more slowly, keeping your drinks colder for longer.

　　Space-Saving Design: These molds often come with a compact design, making them easy to store in the freezer without taking up too much space.

　　Variety of Sizes: Cylinder cup molds come in various sizes, from small cubes ideal for cocktails to larger ones perfect for pitchers or large tumblers.

　　Lid Options: Many silicone cylinder cup molds come with lids, which help prevent spills and keep the ice free from freezer odors.

　　How to Use Silicone Ice Cube Maker Cylinder Cup Molds

　　Using silicone ice cube molds is straightforward, but there are a few tips to ensure the best results:

　　Filling: When filling the molds with water or any other liquid, leave a small gap at the top to allow for expansion as the liquid freezes.

　　Freezing: Place the filled molds flat in the freezer. For best results, allow them to freeze for several hours or overnight.

　　Unmolding: To remove the ice cubes, simply twist the silicone mold or push from the bottom to pop out the cubes easily.

　　Cleaning: Silicone molds are dishwasher safe, but they can also be washed by hand with warm soapy water. Ensure they are completely dry before storing to prevent any odors.

　　silicone ice cube maker

　　Considerations When Choosing Silicone Ice Cube Molds

　　When selecting silicone ice cube maker cylinder cup molds, consider the following:

　　Material Quality: Ensure the mold is made from high-quality, food-grade silicone that is BPA-free and non-toxic.

　　Size and Capacity: Choose a size that fits your needs, whether you want small cubes for cocktails or larger ones for pitchers.

　　Additional Features: Look for molds with lids or other features that make them more convenient to use and store.

　　Conclusion

　　Silicone ice cube maker cylinder cup molds are a versatile and practical addition to any kitchen. They offer durability, ease of use, and the ability to create perfectly shaped ice cubes that enhance your drinks. Whether you¨re preparing for a party or just enjoying a cold drink at home, these molds provide a convenient way to keep things cool. Explore the different designs and sizes available, and elevate your drink experience with high-quality silicone ice cube molds.

　　Choosing which surface treatment to use is a problem that every designer faces. There are many types of surface treatments to choose from, and not only should the economy and practicality of the design be considered, but also the processability of the assembly and even environmental protection requirements should be taken into consideration. The following is a brief introduction to some commonly used coatings for fasteners based on the above principles for reference.know non-standard fasteners price Our growth has to go through many hardships, but entrepreneurs are never afraid and boldly move forward. https://jieruifasteners.com/

　　1. Electrogalvanizing

　　Electrogalvanizing is the most commonly used coating for commercial fasteners. It is relatively cheap and looks good. Common colors include black and military green. However, its anti-corrosion performance is average, and its anti-corrosion performance is the lowest among zinc plating (coating) layers. Generally, the neutral salt spray test of electrogalvanizing is within 72 hours. Special sealants are also used to make the neutral salt spray test reach more than 200 hours, but the price is expensive, which is 5 to 8 times that of general galvanizing. The torque-preload consistency of electrogalvanized fasteners is poor and unstable, and is generally not used for connections in important parts. In order to improve the torque-preload consistency, the method of applying lubricating substances after plating can also be used to improve and improve the torque-preload consistency.

　　2. Phosphating

　　A basic principle Phosphating is cheaper than galvanizing, but its corrosion resistance is worse than galvanizing. Oil should be applied after phosphating, and its corrosion resistance is greatly related to the performance of the oil applied. For example, after phosphating, applying general anti-rust oil, the neutral salt spray test is only 10 to 20 hours. Applying high-grade anti-rust oil can last for 72 to 96 hours. But its price is 2 to 3 times that of general phosphating oiling.

　　There are two common types of non-standard fasteners phosphating, zinc phosphating and manganese phosphating. Zinc phosphating has better lubrication performance than manganese phosphating, and manganese phosphating has better corrosion resistance and wear resistance than galvanizing. Its operating temperature can reach 225 degrees to 400 degrees Fahrenheit (107 to 204 degrees Celsius). Especially for the connection of some important parts. Such as the connecting rod bolts and nuts of the engine, cylinder heads, main bearings, flywheel bolts and wheel bolts and nuts. Phosphating high-strength bolts can also avoid hydrogen embrittlement problems, so in the industrial field, bolts above grade 10.9 are generally treated with phosphating surface treatment.

　　3. Oxidation blackening

　　Blackening + oiling is a very popular coating for industrial fasteners because it is the cheapest and looks good before the oil runs out. Since blackening has almost no anti-rust ability, it will rust quickly after oiling. Even in the presence of oil, the neutral salt spray test can only reach 3 to 5 hours.

　　4. Electroplating cadmium

　　Cadmium coating has good corrosion resistance, especially in marine atmospheric environment, its corrosion resistance is better than other surface treatments. The waste liquid treatment cost in the process of electroplating cadmium is high, and its price is about 15~20 times that of electroplating zinc. Therefore, it is not used in general industries and is only used in some specific environments. For example, it is used for non-standard fasteners for oil drilling platforms and HNA aircraft.