Thermal spray aluminum anti-corrosion coating on steel structure surface

       Thermal spray aluminum anti-corrosion coating on steel structure surface:

Steel structures are generally exposed to the outdoors and are in various environments for a long time (such as industrial cities, fields, mines, oceans, etc.). The erosion of different water quality media in these environments will cause steel structures to be corroded to varying degrees. According to the information, About one-tenth of the steel produced in the world every year turns into rust, and about 30% of steel equipment fails due to corrosion. Under normal circumstances, due to electrochemical corrosion of steel in the atmosphere and water medium, the corrosion rate is very high in the absence of protection. Ordinary paint protection is used, due to the low adhesion strength of the paint to the steel substrate, resistance to erosion and particles. Due to the low wear ability and other reasons, it is often easy to cause local coating loss and shedding, which will cause the steel substrate to rust, resulting in the shedding of large areas of air bubbles, resulting in protection failure in the short term.

The supersonic arc spraying technology is used to thermally spray aluminum on the steel surface, and the sealing treatment is applied to prepare a long-lasting protective coating. On the other hand, when the coating has pores, cracks or damage, because aluminum is a very active metal, it is easy to combine with oxygen to form a dense and hard oxide protection layer. It can effectively prevent the further oxidation of the aluminum coating, that is to say, the thermal sprayed aluminum coating can effectively isolate the substrate and the environment, which should greatly reduce the contact between the substrate and the atmospheric environment and effectively prevent the possibility of atmospheric corrosion. Thereby enhancing the service life of the steel surface.