Usually, after a vehicle has been driven for some time, some abnormal symptoms will appear. After inspection, it will be found that it is due to the wear, corrosion or cracking of parts. What exactly is the cause of such symptoms?

Five major factors:

1. Wear: The phenomenon where the metal on the friction surface of a part is constantly lost during relative motion is called wear, which involves the combined effects of physical, chemical, mechanical and metallurgical factors. For the wear of a surface, it may be caused by a single wear mechanism or a combination of wear mechanisms. The occurrence of wear will cause changes in the shape, size and surface properties of parts, gradually reducing the working performance of parts.

Ii. Corrosion: The corrosion of metal parts refers to the surface damage phenomenon that occurs due to chemical or electrochemical reactions between the surface and the surrounding medium. Corrosion damage always starts from the metal surface and then progresses rapidly or slowly inward, causing changes in the surface's shape and resulting in irregularly shaped cavities, spots and other damaged areas. The result of corrosion is the formation of new substances on the metal surface. Over time, this will lead to the damage of the parts.

Iii. Cavitation: Cavitation typically occurs on the outer walls of diesel engine cylinder liners, turbine blades, water pump parts, and hydraulic pumps, etc. The phenomenon is rather complex and is the result of the combined effects of mechanical, chemical substances, and electrochemical reactions. Simply put, it occurs when the liquid contains impurities or abrasives, and the corrosion rate is very fast.

Iv. Fracture: Fracture refers to the phenomenon where a part undergoes local cracking or splitting into several parts under the sole or combined effects of mechanical force, heat, magnetism, sound, corrosion, etc. Fracture is an important cause of part failure. It refers to the complete fracture of metallic materials when local cracks develop to the crack size of the part and the external load borne by the remaining cross-section exceeds its strength limit under different conditions. Fracture is one of the most dangerous forms of damage during the use of parts. Fractures often cause major accidents and have serious consequences.

V. Deformation: After the worn parts inside the car are repaired, although they regain their original size, the effect after assembly is far less than before. This situation is mainly due to the deformation of parts, which disrupts the mutual positional accuracy between components and affects the interrelationships among the constituent parts.

If a vehicle shows any of these five conditions, it is recommended to replace it. Even after a simple repair, the same problem may still occur in a short time, which is both time-consuming and laborious. In daily use, high-quality maintenance products should be chosen. Long-term use of inferior products will also accelerate the damage of parts.