Posted on 2015-12-28 Dacromet, is a kind of zinc powder, aluminum powder, chromic acid and deionized water as the main component of the new anti-corrosion coatings.
Because the Dacromet coating have high corrosion resistance, but also can ensure no hydrogen embrittlement, high strength anti-corrosion truck chassis and bracket, connecting pieces, exposed parts and fasteners, such as various special-shaped steel frame, bolt (including
Riding bolt, wheel bolts, etc.), nuts, etc.. Foreign car has clearly suggested than fastening level 10.9 thing to use of Dacromet coating.
Corrosion around the engine and other heat environment of metal products, such as insulation board, exhaust pipe, radiator, engine cylinder head and other parts. The traditional passivation film will be destroyed at about 70 DEG C, the corrosion resistance decreased sharply, and the curing temperature of Dacromet coating is about 300 degrees, chromate polymer coating containing no crystalline water, coating is not easy to be destroyed at high temperatures and exhibit excellent corrosion resistance to.
The truck elastic parts such as anti-corrosion, hoop, semi-circular hoop, various types of springs, spring etc.. These parts of the strength and hardness are higher, electroplating processing will produce hydrogen embrittlement, such as hydrogen is not complete, long time under dynamic load are prone to tearing or corrosion fatigue, will bring security to the vehicle, especially for the truck, the working environment is relatively poor, so for those parts of the surface processing requirements are higher however, Dacromet coating has high corrosion resistance, high weatherability, surface treatment is very suitable for this type of auto parts.
A variety of shapes of the truck on the complex pipe, cavity parts of the anti-corrosion, such as engine exhaust pipe, muffler, etc.. If this kind of parts is used in electroplating, the coating is not uniform, even if the coating is not uniform, which may cause a sharp drop in the corrosion resistance, which directly affects the performance and service life of automobile parts.