Stainless steel surface coloring treatment

Aluminum alloy due to light weight, high specific strength, good corrosion resistance, non-magnetic, good formability and low temperature performance is widely used in a variety of welding structure products, the use of aluminum alloy instead of steel plate welding material, the weight of the structure can be reduced by more than 50%.

Stainless steel coloring not only gives stainless steel products a variety of colors, increase the variety of products, and improve the wear resistance and corrosion resistance of products.

There are several stainless steel coloring methods as follows:

(1) Chemical oxidation coloring method: that is, in a specific solution, through chemical oxidation to form the color of the film, there are dichromate method, mixed sodium salt method, sulfurization method, acid oxidation method and

Alkaline oxidation. Generally, Inco method is used more, but to ensure the same color of a batch of products, the reference electrode must be used to control.

⑵ Electrochemical coloring method: it is the color of the film formed by electrochemical oxidation in a specific solution.

⑶ Ion deposition oxide coloring method chemical method: that is, the stainless steel workpiece in the vacuum coating machine for vacuum evaporation plating. For example: titanium plating hand case, watch belt, general

It's golden yellow. This method is suitable for bulk product processing. Because the investment is large and the cost is high, it is not economical to produce small quantities.

(4) High temperature oxidation coloring method: it is in a specific molten salt, immersed in the workpiece to maintain a certain process parameters, so that the workpiece form a certain thickness of oxide film, and show a variety of different colors.

⑸ Gas phase cracking staining method: more complex, less used in industry.