How to deal with blackened stainless steel tubes?

In fact, according to the normal situation, good quality stainless steel tube in normal use will not turn black. If the stainless steel tube products in long-term use black, because the action of air in the stainless steel tube produced a layer of oxide film, the main role of this oxide film is to keep the stainless steel internal metal elements do not continue to be oxidized. This oxide film does not need to be rubbed off, it does not damage the pipe. This does not happen with quality stainless steel produced by Budweiser Steel Co.,LTD.

We will find that different materials of stainless steel tube because of the difference in element content, the color of the oxide film will be different, but they have no effect on the tube, in this case there is no need to do other processing. But if you think it affects the appearance, you can go to the stainless steel pipe processing center to do a polishing treatment, you can easily solve the problem.

If the phenomenon of blackening occurs in stainless steel pipe welding, this is because the welding gas is not pure enough or high temperature oxidation, etc., the use of the following three methods can avoid this kind of thing.
1.The purity of argon gas used in stainless steel tube welding to pure argon, from the outer surface of the stainless steel tube alone, pure argon to be more obvious than the general argon gas welding out the brightness of some.
2. The back of the argon gas to do a good job of protection, it is important to do after the stainless steel pipe factory steel pipe welding back protection, otherwise, high-temperature oxidation will lead to the back of the defect through the weld layer oxidation, with welding slag grinding back of the weld, which can effectively protect the back of the oxidation after the weld.
3.Can be done on the back side coated with back protection agent, is a kind of argon gas protection can be omitted, coated with a thickness of about 1 mm can be, and then in the front welding, in the back to form a thin film to form a protective layer.
Zhejiang Bewell® Steel Industry Co.,Ltd. is a professional manufacturer and supplier of 304 austenitic stainless steel seamless steel pipe in China. For many years, we have been specialising in producing various types of Bewell® stainless steel seamless tubes. Our products have good price advantage and cover most of the European market. We look forward to being your long-term partner in China. We welcome new and existing customers to come and buy from us.