304 stainless steel pipe actually still black?

[guidebook] : In fact, according to the normal production process, good 304 stainless steel tube processing will not appear after making this situation. If 304 stainless steel tube long-term application of blackening and darkening, this is due to the role of the air 304 stainless steel tube formed a layer of oxidation film, this layer of oxidation film is the key role is to maintain the maintenance of stainless steel...

304 stainless steel tube

In fact, according to the normal production process, good 304 stainless steel tube processing will not appear after making this situation. If 304 stainless steel tube long-term application of blackening and darkening, this is due to the role of the air 304 stainless steel tube formed a layer of oxidation film, this layer of oxidation film is the key role is to maintain the maintenance of stainless steel tube inside the metal materials will not be oxidized, this layer of oxidation film without intentionally rubbing down the pipe is not harmful. Of course, different materials rust steel pipe due to some differences in the composition of chemical elements, so the oxidized film color will be different, but will not affect the normal use of the pipe. This kind of situation does not have to deliberately deal with, if you feel unattractive, you can go to the stainless steel pipe manufacturers to polish and sand down, it can be easily solved.

If it is not 304 rusty steel pipe welding, 304 stainless steel pipe inside and outside the surface of the black, yellow this is due to the weld gas purity or the back of the high temperature oxidation and other reasons, pay attention to the following three points can prevent the occurrence of such a situation.

1, the 304 stainless steel tube welding application of argon purity to pure argon, from the stainless steel tube outer surface alone, pure argon than Pu argon welding chromaticity significantly brighter.

2, the back of the argon gas to get good maintenance, 304 stainless steel pipe after welding to do back maintenance, otherwise, high temperature oxidation will cause the back of the weld layer through the oxidation caused by the shortcomings of the back of the weld layer, polishing and polishing the back of the weld with the slag, therefore, after the maintenance of the back of the oxidation can be reasonably avoided.

2, you can do in the back to smear the back of the protective agent, is a kind of argon protection can be saved, coated with about 1mm thickness can be. Subsequently in the front welding, in the back of the formation of a thin film into a protective layer.

If it is a long time ago found 304 stainless steel pipe weld marks black can choose pickling passivation paste clean up, is to use acid to the surface of the gray-black oxidized layer of etching off, followed by cold water to clean neatly, it can be. Therefore, in order to better prevent 304 stainless steel pipe appear this kind of blackened advice, it is proposed to pick a quality assurance stainless steel pipe manufacturer.