Pickling of the outer surface of stainless steel equipment

Purpose: To perform a thorough acid cleaning and passivation of stainless steel, removing various types of oils, rust, scale, weld spatter, and other contaminants; after treatment, the surface becomes a uniform silver-white color. This process **improves the corrosion resistance of stainless steel**, and it is suitable for various types of stainless steel parts, sheets, and related equipment. 　　Features: Simple to operate, easy to use, cost-effective. It also contains high-efficiency corrosion inhibitors and antifog agents to prevent excessive corrosion and hydrogen embrittlement in metals, as well as to suppress the formation of acid fog. It is particularly suitable for small, complex workpieces in situations where coating is not feasible, and it outperforms similar products on the market. 　　Usage: Depending on the type of stainless steel and the severity of oxidation, it can be used in its pure form or diluted with water at a ratio of 1:1 to 1:4 ； Ferritic, martensitic, and austenitic stainless steels with low nickel content (such as 420, 430, 200, 201, 202, 300, 301, etc.) are used after dilution, while austenitic stainless steels with higher nickel content (such as 304, 321, 316, 316L, etc.) are soaked in their original form ； It is generally used at room temperature or after being heated to 50–60 degrees. Soak it for 3–20 minutes or longer (the exact time and temperature should be determined by the user based on their own testing), until the surface dirt is completely removed and a uniform silver-white color appears, with a uniform and dense passivation film formed. After treatment, remove it and rinse it thoroughly with clean water; it is advisable to rinse it further with alkaline water or lime water to neutralize it.