The main elements of stainless steel are iron, nickel and chromium, which are alloy products of these three metals. The three metals can be produced in different proportions. The resulting stainless steel products also have different properties and different appearances. When the iron content is constant, the higher the chromium content, the brighter the stainless steel wire, and the higher the nickel content, the darker. If the content of chromium and nickel does not change, the content of iron will become darker when the content of iron increases. This is the judgment of the initial appearance of the product.
If the blackening occurs during use, it is caused by oxidation, that is, the iron contained in it will quickly turn black when heated and oxidized, and there is no sign of rust.
In the production process, the lubrication of the wire drawing machine is not good enough, the friction resistance is too large, the surface heating of the stainless steel wire causes the segregation of the metal elements in the steel wire, the alloy composition is analyzed, and the surface becomes black.
There is no single reason for the blackening of stainless steel wire mesh. To solve this problem, we need to solve it from many aspects.
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