SEND INQUIRY
How much does coating treatment improve the corrosion resistance of the wheel hub?
2024-10-31
- Protective effect of forming an isolation layer
- The coating treatment forms a continuous protective film on the surface of the wheel hub. This film can effectively isolate the aluminum alloy matrix of the wheel hub from corrosive media in the outside world, such as moisture, oxygen, salt, etc. For example, in a humid environment, water vapor in the air is easy to condense into small water droplets on the metal surface, and the oxygen dissolved in the water will react with the metal to cause corrosion. The protective film after coating can prevent oxygen and moisture from directly contacting the surface of the wheel hub, greatly reducing the possibility of corrosion.
- For vehicles that often run in coastal areas, the sea breeze contains a large amount of salt. Salt will accelerate the corrosion process of metals because salt ions will destroy the oxide film on the metal surface and make the metal more easily oxidized. The wheel hub after coating can resist the erosion of salt and prevent corrosion spots from appearing on the surface of the wheel hub.
- Enhance chemical stability
- The coating itself has certain chemical stability. Many wheel hub coatings contain corrosion-resistant chemical substances, such as epoxy resin. Epoxy resin coatings have good chemical corrosion resistance and can resist the erosion of acids and alkalis and other chemical substances.
- When the wheel hub comes into contact with some chemical substances, such as snow melting agents on the road (usually containing chemical components such as chloride), automobile brake fluid, etc., the coating layer can prevent these chemical substances from reacting with the wheel hub matrix chemically, thereby protecting the structural integrity of the wheel hub.
- Improve weather resistance
- Coating can improve the weather resistance of the wheel hub, enabling it to resist the influence of environmental factors such as ultraviolet rays and temperature changes. Ultraviolet rays will age and embrittle metal materials, and high-quality coating materials can absorb and reflect ultraviolet rays, reducing their damage to the wheel hub matrix.
- In different seasons, the wheel hub will experience large temperature changes. For example, in summer when the temperature is high, the surface temperature of the wheel hub may be very high, and in winter when it is cold, the temperature will be very low. This temperature change will cause the metal material to expand and contract thermally. In the long run, it may cause micro-cracks and other defects on the wheel hub surface. The coating layer can alleviate the influence of this thermal stress and prevent corrosive media from the outside from entering the inside of the wheel hub through micro-cracks during the temperature change process, thereby improving the corrosion resistance of the wheel hub.
In general, the corrosion resistance of a wheel hub after proper coating treatment can be several times or even more higher than that of an uncoated wheel hub. The specific degree of improvement also depends on factors such as the quality of the coating, the coating process, and the usage environment of the wheel hub.