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How to solve the blackening of the weld mark of stainless steel pipe welding?

by:HHGG     2021-04-21
How to solve the blackening of the weld mark of stainless steel pipe welding? 2018-12-26 Today, I saw a processor on Baidu Qu0026A and asked: 'While the stainless steel pipe is welded, there are those weld marks, which are black and dark. How to solve it?' In fact, it is usually on the market. Most of the solutions are these types: weld bead treatment agent, weld bead treatment liquid, stainless steel passivation paste, stainless steel passivation liquid and so on. These are all common methods, and the price is relatively low. The stainless steel pickling solution can be used as appropriate, of course, it can also be blackened and completely polished. In addition, the root causes and solutions for the darkening of stainless steel pipes after pickling are as follows: There are two basic reasons for the blackening of stainless steel pipes after pickling: one is that the oil stains are not completely removed, and many residues are formed after pickling. Surface layer of stainless steel pipe. Secondly, excessive pickling will also cause blackening of the surface of the stainless steel pipe. If the darkened area can be removed by hand, just use the film stripping solution, which can quickly eliminate the gray-black things caused by pickling. Apply this kind of potion directly to the place where the surface of the stainless steel part is darkened by pickling, and clean it with water after the gray and black completely fade. The above is for your reference only, to find a suitable solution for you according to the specific situation.  
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