JIMI STEEL MILL LIMITED

When selecting stainless steel in corrosive environment, in addition to having a detailed understanding of the specific service conditions of stainless steel, the main factors to be considered include: corrosion resistance, strength, toughness and physical properties, processing, formability, resources, price and difficulty of obtaining.

Corrosion resistance includes rust resistance and resistance to acid, alkali, salt and other corrosive media, as well as oxidation resistance, vulcanization, chlorination and fluorination at high temperature. Since different stainless steels are mainly selected to solve various corrosion problems encountered in practical engineering, how to improve the corrosion resistance of stainless steel in corrosive environment is the first thing to be considered by material selection personnel. Corrosion is the damage caused by chemical or electrochemical action between metal and medium, and corrosion resistance refers to the ability of stainless steel to resist the corrosion damage of medium. Therefore, when corrosion resistance is involved in material selection, the following points should be paid attention to.

The standard of corrosion resistance is artificially determined. It should be recognized and used, but it can not be bound by it. The specific standard of corrosion resistance should be determined according to the specific application requirements. At present, grade 10 standard is mostly used for the corrosion resistance of stainless steel. Which grade is selected as the corrosion resistance requirement should consider the characteristics of equipment and parts (thickness and size). Requirements for service life and product quality (such as impurities, color and purity). Generally speaking, level 1 ~ 3 standards can be selected for equipment, instruments and components requiring smooth mirror or precise size during use;