Three common stainless steel surface treatment processes for stainless steel electroplating
There are many methods for surface treatment of stainless steel, such as: electroplating, anodizing, sandblasting, painting, passivation, pickling, degreasing, degreasing, rust removal, etc. The three common stainless steel surface treatment processes are as follows:
1. Passivation of stainless steel
The recommended appearance for this process must be iron-free. The presence of stainless steel particles on the surface of any iron, cast iron, mild steel, medium carbon steel or low alloy steel will promote pitting corrosion of "free" iron and stainless steel on its surface. This is a very serious problem, so passivation is only used for stainless steel and stainless iron. The primary purpose of stainless steel passivation is to prevent oxidation and corrosion of the stainless steel surface.
2. Pickling of stainless steel
The purpose of stainless steel pickling treatment is to remove the oxide scale on the surface of stainless steel after high temperature welding, heat treatment or hot working. It also eliminates red rust corroded steel or iron or steel particle contamination. Please note that if there is no acid to clean the surface after pickling, the surface will soon begin to rust and corrode. This results in reduced corrosion resistance of the underlying steel outer skin.
The stainless steel pickling process can be applied to the surface treatment of all 200, 300 and 400 series stainless steels. All pickling operations result in a slight dimensional change while the metal surface will remove impurities, so the result is to some extent a matte visual brightness that may also be a significant reduction in scale. Heat treatment in vacuum or a well-controlled atmosphere, such as bright annealing, eliminates the need for pickling and usually results in a better bright finish to the stainless steel.
3. Stainless steel cleaning agent degreasing and degreasing
Stainless steel surface treatment The pre-treatment of any process must first remove grease, cutting fluid, drawing compounds and other lubricants, etc., before the surface heat treatment or final passivation treatment of stainless steel parts can be carried out. It is also necessary for stainless steel parts to be further welded before the degreasing process is carried out to prevent the pickup of carbon at high temperatures. Stainless steel electroplating usually uses stainless steel cleaning agent, which only needs to be soaked at room temperature for 1-8 minutes to remove any oil stains. The operation is simple, the labor intensity is low, it can be used repeatedly, and the production cost is effectively reduced. In cleaning operations with other metals, cleaning rates can be increased through the use of brushing, spraying or mixing operations.