The corrosion resistance of ferritic stainless steel is better than that of martensitic type

In addition to being used in wet corrosion, stainless steel products are also used in high temperature because they contain a large amount of Cr and have excellent high temperature performance. The properties required by heat-resistant stainless steel are not only used in general heat treatment furnace materials and industrial heat-resistant components, thermal power boilers and reactor materials in the chemical industry and other industrial fields, but also widely used in automobile exhaust system components and household heaters. and other daily necessities.

In the process of stainless steel electroplating, in order to make up for the weakness of stainless steel, which is soft, not wear-resistant and has a large friction coefficient, electroplating is often used to improve the surface hardness and self-lubricating properties of stainless steel drive shafts and other matching parts. Stainless steel is a metal that is easily passivated on the surface, and the surface passivation film must be removed before electroplating. Equal coating. Generally, in the corrosive wear process where abrasive wear is dominant, martensitic stainless steel should be used, and in the corrosive wear process where corrosion is dominant, austenitic stainless steel should be used. The corrosion resistance of ferritic stainless steel processing is better than that of martensitic type and inferior to that of austenitic type. But its price is lower than the austenitic type.

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