Can Stainless Steel Capillary Rust in Wet Places?

Stainless steel capillary is called stainless steel, mainly because it has good corrosion resistance, can prevent its rust, so that it can be used in each acid and base environment. Especially with the continuous development of stainless steel production technology, the probability of our stainless steel products to rust is greatly reduced.

Although the occurrence of rust is reduced, it does not mean that it will not occur. So what factors affect the occurrence of rust at present?

Factor one: Chloride ion corrosion Chloride ion in nature is the most exist in an example, everywhere, such as salt, sweat, seawater, soil and so on. Although stainless steel has good corrosion resistance, but in the presence of a large number of chloride ions in the environment, corrosion performance is relatively weak, resulting in rust phenomenon. Therefore, the use of stainless steel is environmental requirements, can not be used in the environment containing a large number of chloride ions.

Factor two: without solid solution treatment in general stainless steel in addition to carbon elements, there are other metal alloy elements. At present, stainless steel among the more alloying elements are nickel, manganese, chromium and so on. The increase of these metal elements will improve the performance of stainless steel, but if the solution treatment is not carried out, then the matrix alloy content is low, the corrosion resistance is poor, which will be corroded by the corrosion factor in the environment.

Factor three: Innate intergranular corrosion Materials that do not contain titanium and niobium have a tendency to intergranular corrosion. At present, most of the stainless steel material in our country has not added titanium and niobium. Although the surface of the stainless steel is not likely to corrode, the inside of it is beginning to corrode. At the same time, in the process of machining, some behaviors will accelerate the intergranular corrosion, such as welding. As long as these factors are properly dealt with, rust can be reduced.

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