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Stainless steel rod
Oct 20, 2017

Stainless steel rods are divided into stainless steel round bar, stainless steel square bar, stainless steel hexagonal bar

Stainless steel pitting

cause:

Stainless steel pitting occurs in the presence of iodine, chlorine, bromine and other aqueous environment. The reason for the generation of stainless steel pitting is that the chloride ion is the active anion, is easily adsorbed, squeezed by oxygen atoms, and the cation in the passivation film reacts to produce soluble chloride, destroys the passivation film, forms the pores, forms the pitting corrosion stage , In this stage the formation of occlusion circuit, the occurrence of current corrosion [2].


Precautions:

1, in the known pitting may occur in the environment to choose the appropriate stainless steel, the experiment shows that molybdenum (Mo) or manganese (Mn) content of the higher stainless steel, the ability to resist pitting stronger;

2, control and stainless steel contact with the liquid pH, chloride concentration and temperature;

3, cathodic protection, anode protection or both take these two protective measures;

4, as far as possible the use of better quality stainless steel, such as 316 or 316L, to improve the corrosion resistance of stainless steel rods.








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