Fasteners anticorrosive layer maintenance matters needing attention

Stainless steel fasteners are made from metal, and metal corrosion method mainly has four aspects, namely the nature of the material itself, the use of the environment, data and environment of the interface, and improve the design of metal structures.

If manufactured complete corrosion resistant alloy to stainless steel fasteners, unless there are special requirements, otherwise the concept of the economy, it is not really interstate or fasteners, the appearance of corrosion environment factor is the complete isolation, also does not work in practice, can be very difficult. Metal structure design can be improved in a certain situation down to improve the effects of special circumstances, but most of the design of stainless steel fasteners, cannot be fully corrected, and the maintenance work is not for rendering, so it couldn't handle basic problem, as long as the corrosion on the interface, i.e. appearance anti-corrosion treatment methods widely used at present.

Stainless steel fasteners appearance anticorrosive treatment is refers to the use of various method applying maintenance in the metal surface layer, its effect is the metal from the corrosive environment, to reduce the corrosion process, or reduce corrosive medium in contact with the metal surface, in order to avoid or reduce the purpose of the corrosion.

Stainless steel fasteners, maintenance layer should be able to agree with the following request:

1, corrosion resistance, abrasion resistance, high hardness,

2, tight structure, sound, small pore.

3, with the substrate metal separation of solid and good bond.

4, the average spread and has a certain thickness.

While maintaining layer is usually divided into two categories, metal coating and non-metallic coating, metal coating is with strong corrosion resistance of metal or alloy in easy to corrosion of metal appearance maintenance layer, the coating and coating. Produce metal coating method and quite a few varieties, including * is common electroplating method, followed by the molten metal dip process (hot dip plating) appearance and chemical treatment. Non-metallic coating is refers to the use of organic polymer materials such as paint, and inorganic materials such as ceramics, the metal equipment or parts constitute maintenance layer on the surface, the maintenance medium complete isolation layer to substrate metal and environment, avoid matrix metal because of contact corrosion medium in stainless steel standard parts and form corrosion.