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Application of Dacros technology

  • Categories:NEWS
  • Author:Minchuang Fitting
  • Origin:Original
  • Time of issue:2021-09-12
  • Views:226

(Summary description):1. Anti-corrosion of small and medium supports, connectors, exposed parts and fasteners of all kinds of high strength chassis of trucks, such as vario···

Application of Dacros technology

(Summary description):1. Anti-corrosion of small and medium supports, connectors, exposed parts and fasteners of all kinds of high strength chassis of trucks, such as vario···

  • Categories:News
  • Author:Minchuang Fitting
  • Origin:Original
  • Time of issue:2021-09-12
  • Views:226
Information

1. Anti-corrosion of small and medium supports, connectors, exposed parts and fasteners of all kinds of high strength chassis of trucks, such as various special-shaped steel supports, bolts (including riding bolts, wheel bolts, etc.), nuts, etc. Foreign countries have clearly recommended the use of dacro-coated anticorrosion for fasteners of grade 10.9 or higher on automobiles, because dacro-coated not only has high corrosion resistance, but also can guarantee no hydrogen embrittability. High strength steel has the risk of hydrogen embrittleness in the process of pickling and electroplating. Although hydrogen can be dehydrogenated by heat treatment, it is difficult to remove it completely. The daccro coating process does not require pickling and activation, and does not lead to the electrochemical reaction of hydrogen evolution, which avoids the phenomenon of hydrogen embrittleness.

2, around the engine and other high heat environment of metal parts of the anti-corrosion, such as heat insulation board, exhaust pipe, radiator, engine cylinder head and other parts. The passivation film on the surface of the traditional galvanized layer will be destroyed at about 70℃, and the corrosion resistance decreases sharply. However, the curing temperature of the Dacro coating is about 300℃. The chromate polymer in the coating does not contain water of crystallization, and the coating is not easy to be destroyed at high temperature, showing excellent corrosion resistance. The appearance of the parts treated by dacro process is almost unchanged at 250℃ for a long time, and the corrosion resistance is very strong.

3, the anti-corrosion of various elastic parts of trucks, such as hoop, semicircle clamp, all kinds of springs, plate springs, etc. These parts strength and hardness of the demand is higher, electroplating processing can produce hydrogen embrittlement, such as incomplete to hydrogen, for a long time under dynamic load are prone to tearing or corrosion fatigue, can bring safe hidden trouble to the car, especially for truck, its working environment is bad, so the surface treatment requirements for these parts is higher, corresponding and dacromet coating with high corrosion resistance, High weather resistance, very suitable for this type of automotive parts surface treatment.

4, truck on a variety of complex shape of pipe, cavity parts, such as engine exhaust pipe, muffler, etc.. If such parts are electroplated, due to the complex shape of such parts and the limitations of electroplating process, the coating formed is not uniform, and even leakage plating may occur, which will make the corrosion resistance of the parts decline sharply, and directly affect the performance and service life of automobile parts. And tak Luo Gongyi adopting impregnating way, there is no levelling ability in the process of electroplating and depth ability is bad, and the penetration of dacromet fluid has excellent ability, in close contact with the aperture can form good protective film, especially suitable for tube and cavity complex automobile parts of anticorrosion, some assembly parts after assembled as appropriate to dacromet. In addition, dacro coating is also not by a variety of oil, antifreeze, cleaning agent and other chemical products, chemical resistance, weather resistance are also very good, so dacro is very suitable for truck chassis and automotive external parts of the corrosion.


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