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Introduction to the surface treatment method of cryogenic liquid CO2 tank
Date: Nov 30, 2019
Jianshen tank continues the previous article to introduce two other methods of surface treatment of cryogenic liquid CO2 tank. Surface mirror bright treatment method: According to the complexity of stainless steel products and different user requirements, mechanical polishing, chemical polishing, electrochemical polishing and other methods can be used to achieve the mirror gloss of cryogenic liquid CO2 storage tanks. Surface coloring treatment: Stainless steel coloring not only gives stainless steel products a variety of colors, increases the variety of product colors, but also improves the wear resistance and corrosion resistance of the product.
There are several methods of stainless steel coloring: chemical oxidation coloring: the color of the film formed by chemical oxidation in a specific solution, including dichromate method, mixed sodium salt method, sulfurization method, acid oxidation method and alkaline oxidation method . Generally, the INCO method is used more, but to ensure the uniform color of a batch of products, a reference electrode must be used to control it.
Electrochemical coloring: The color of a film formed by electrochemical oxidation in a specific solution. 
Ion deposition oxide coloring chemical method: Place stainless steel workpieces in a vacuum coating machine for vacuum evaporation plating. For example: titanium-plated watch cases and watch bands are usually golden yellow. This method is suitable for high-volume product processing. Because of the large investment and high cost, small batches are not cost effective.
High-temperature oxidation coloring method: It is immersed in a certain molten salt to keep the workpiece at a certain process parameter, so that the workpiece forms an oxide film with a certain thickness and presents various colors. Gas-phase cracking and coloring method: It is more complicated and it is rarely used in industry. The above are the several methods for the surface treatment of liquid carbon dioxide storage tanks. I hope it will be helpful to everyone.
There are several methods of stainless steel coloring: chemical oxidation coloring: the color of the film formed by chemical oxidation in a specific solution, including dichromate method, mixed sodium salt method, sulfurization method, acid oxidation method and alkaline oxidation method . Generally, the INCO method is used more, but to ensure the uniform color of a batch of products, a reference electrode must be used to control it.
Electrochemical coloring: The color of a film formed by electrochemical oxidation in a specific solution.
High-temperature oxidation coloring method: It is immersed in a certain molten salt to keep the workpiece at a certain process parameter, so that the workpiece forms an oxide film with a certain thickness and presents various colors. Gas-phase cracking and coloring method: It is more complicated and it is rarely used in industry. The above are the several methods for the surface treatment of liquid carbon dioxide storage tanks. I hope it will be helpful to everyone.
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