High temperature resistance, corrosion resistance - How do automotive plastic parts improve the durability of the engine compartment?
Publish Time: 2025-04-02
In terms of improving the durability of the car engine compartment, high temperature and corrosion resistance automotive plastic parts play a vital role. These high-performance plastic parts can not only withstand the high temperature environment in the engine compartment, but also effectively resist the corrosion of various chemicals, thereby extending the service life of various components in the engine compartment and improving the reliability and safety of the whole vehicle.1. Application of high temperature resistant plastic partsPPS (polyphenylene sulfide): PPS is a high-performance special engineering plastic with excellent high temperature resistance and can work continuously at high temperatures above 200°C. It is very suitable for the engine compartment and battery system of new energy vehicles, and can ensure the stability of physical properties in high temperature environments.PPA (high temperature nylon): PPA shows high heat resistance by introducing benzene rings into traditional polyamide resins. The long-term use temperature is about 170°C, and the heat deformation temperature is also quite high (about 290℃), with excellent welding resistance.PEEK (Polyetheretherketone): PEEK injection molded parts have excellent high temperature resistance, with a glass transition temperature of about 143°C and a melting point of up to 334°C. In the high temperature environment of the engine, PEEK injection molded parts can maintain stable physical and chemical properties and are not easily deformed or damaged.PPSU (Polyphenylene sulfone): PPSU can be used for a long time at temperatures up to 180°C without deformation, far exceeding the temperature resistance limit of traditional plastic materials.Component design: In view of the high temperature environment in the engine compartment, the design of plastic components needs to consider heat dissipation performance, such as adding heat sinks, optimizing flow channel design, etc., to reduce the operating temperature of the components. At the same time, the structure of the components should be as simple as possible to reduce the concentration points of thermal stress and improve the heat resistance of the components.2. Application of corrosion-resistant plastic componentsPPS: PPS has excellent corrosion resistance to a variety of chemical substances and is not affected by environments such as acids, alkalis and refrigerants. It is particularly suitable for various components in automotive thermal management systems.PPSU: PPSU can remain stable in a wider range of chemical media, including strong acids, strong alkalis and various organic solvents, making it an ideal choice for engine steam cover materials.PEEK: PEEK injection molded parts have good tolerance to most chemicals, can resist the erosion of chemicals such as fuel, lubricating oil, coolant, etc., and maintain the stable performance of the parts.Surface treatment: Surface treatment of plastic parts, such as spraying anti-corrosion coating, electroplating, etc., can further improve their corrosion resistance. Select appropriate coating materials and processes to ensure good bonding between the coating and the substrate, as well as the corrosion resistance of the coating itself.3. Comprehensive application and advantagesLightweight design: High-performance plastic parts have a lower density than traditional metal materials, which helps to reduce the weight of the engine compartment and improve the fuel economy and handling performance of the vehicle. For example, using PEEK injection molded parts to replace traditional metal parts in parts such as the engine's intake manifold and oil pan can significantly reduce the weight of the engine.Improve durability: High-temperature and corrosion-resistant plastic parts can withstand the harsh working environment in the engine compartment, reduce component damage and replacement frequency, and thus reduce maintenance costs. These high-performance plastic parts also have excellent mechanical properties and wear resistance, which can extend the service life of the parts.Enhanced safety: The stability and reliability of high-performance plastic parts help improve the safety of the entire vehicle. For example, using PEEK injection molded parts in the seals and gaskets of the engine can effectively prevent the leakage of fuel, lubricating oil, etc., ensuring the normal operation of the engine.In summary, high temperature and corrosion resistance automotive plastic parts play an important role in improving the durability of the engine compartment. By selecting suitable materials, optimizing component design, and performing surface treatment, the performance and reliability of these plastic parts can be further improved, thereby extending the service life of various components in the engine compartment and improving the performance and safety of the entire vehicle.
