What are the factors affecting the corrosion of Jiangsu bimetal liner?

Published:

2022-11-25

The selection of wear-resistant and anti-corrosion pipes and equipment is particularly important, which completely solves the problems of wear-resistant and anti-corrosion in the chemical industry, such as running, emitting, dripping and leaking. The following is a brief introduction to the use of Jiangsu bimetal liner in the chemical industry. 1、 Reasons for corrosion damage of Jiangsu bimetal liner: 1. Overtemperature and overpressure during operation, imperfect equipment management and careless thinking are also the main reasons for corrosion. 2. There are many corrosive media in chemical production, such as acid, alkali, salt, water, oxygen, etc., which is one of the main reasons for corrosion. 3. The unreasonable layout design, improper material selection, low manufacturing and processing quality, surplus welding, lack of anti-corrosion methods or poor construction quality of the bimetal composite liner provide an environment for corrosion damage. 2、 Connotative elements of corrosion damage of Jiangsu bimetal liner: 1. The rougher the appearance of the parts, the more likely they are to corrode. If the surface has oxide film, it is corrosion resistant. 2. Different metals have different corrosion resistance abilities with respect to different media. 3. Metal corrosion is fast at the places where the shape of equipment layout changes suddenly, such as openings, gaps or dead corners. 4. The coarser the metal grains, the faster the corrosion. On the contrary, the slower it is, for example, stainless steel has higher corrosion resistance than cast iron. 3、 Jiangsu bimetallic liner plate constitutes the external elements of corrosion damage: 1. The greater the external force or residual stress on the components of the bimetal composite liner, the faster the corrosion. 2. The type, chemical composition, concentration, pH value, impurities, moisture and oxygen content of the medium are the external causes of corrosion. 3. The faster the medium moves, the more likely it is to corrode. It will erode the protective film, causing vortex, turbulence and cavitation, leading to severe impact wear and cavitation corrosion. 4. Stress and fatigue. On the one hand, the occurrence of equipment stress is formed during processing, such as the deformation stress of cold processing and the arrangement stress of hot processing; On the other hand, the parts subject to pressure or rotation in the work will also cause stress. The effect of these stresses will lead to the internal distortion of the bimetallic composite liner, thus reducing the electrode potential of this part and aggravating the corrosion of the micro battery. 5. The higher the temperature and pressure of the medium, the faster the corrosion. As corrosion is a chemical reaction, the corrosion rate will be increased by 1-3 times for every 15% temperature rise. With the increase of temperature, the dispersion speed increases, and the resistance of electrolyte decreases, so the reaction of corrosive battery is accelerated. Jingjiang Yongxin Special Steel Co., Ltd. specializes in the production of bimetallic liner, mainly engaged in: Jiangsu bimetallic liner, bimetallic composite liner, rod mill liner, mining bimetallic composite liner, ball mill bimetallic composite liner, rod mill bimetallic composite liner, rod mill bimetallic liner, semi-automatic mill liner, super large ball mill bimetallic composite liner and other products. Welcome to consult and cooperate!