Stainless Steel Pipe Fittings

Several processes of pickling and passivation on the surface of stainless steel plate

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When the surface of the stainless steel plate is not annealed (for example, the surface after welding), drilling mud residue, rust-proof film, or ferrite impregnated with stainless steel after the molding process, the corrosion resistance of the stainless steel material will be directly affected. At this point you need to use acidic oil cleaning agent to do the appropriate cleaning and maintenance operations on the stainless steel surface.
Stainless steel pickling passivation can completely remove impurities and promote the formation of a new passivation layer, which is a complete chemical reaction process. It can not only clean the surface of the stainless steel plate, but also can form a completely uniform silver white on the surface of the treated stainless steel plate. According to actual tasks, stainless steel plates with different structures and surface sizes can use different pickling products.
First look at the stainless steel pickling passivation paste, this product is used to deal with the surface of the larger stainless steel plate or surface weld around the weld spot, oxide layer color, as long as the uniform smear on the surface of the stainless steel plate, wait until The surface of the stainless steel plate is completely uniform and white.
Followed by the stainless steel pickling passivation solution, which is mainly used for the pickling of small serial parts, such products are easy to immerse, usually using plastic containers soaked at room temperature, and even can achieve high efficiency pickling and passivation done synchronously, such as stainless steel After the surface of the board has been pickled and passivated, the maximum salt spray resistance can reach about 500 hours.
In addition to the pickling spray, this process is suitable for pickling large stainless steel surfaces (including wall panels, containers) as well as non-removable structures or difficult-to-access structures such as bridge components. Pickling sprays can increase application control.
There is also ablation pickling. This technique can remove the surface tension and internal stress of the stainless steel plate material by specifically removing the 3-5 micron surface, and also remove surface microcracking.
However, no matter which process is used, the treated surface acid must be completely cleaned. It is best to use high-pressure cleaning.
Source: China Stainless Steel Plates Manufacturer – Yaang Pipe Industry Co., Limited (

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Stainless Steel

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