How to carry out anti-corrosion treatment for automotive spraying equipment?
What are the anti-corrosion methods for drying equipment in painting equipment? Most drying equipment consists of welded parts, flat plates, and cylinders. For the desiccant treatment of dryers for different purposes, the following describes some of the experience of drying equipment in material anti-corrosion and manufacturing methods.
1. Discussion on the welding of austenitic nickel-chromium stainless steel Many of the drying equipments are plate welded structural parts, and most of the plates are 1Cr18Ni9Ti (18-8 type). Corrosion, fracture and other problems often occur during the welding process. Seriously affect product life and performance. The difference between austenitic stainless steel and ordinary carbon steel is that the thermal conductivity is poor, the expansion coefficient is large when heated, and the resistance value is high. Due to these characteristics of austenitic steels, special welding processes are required for welding. Intergranular corrosion is one of the main problems of high alloy steel. This steel itself has high corrosion resistance, but the corrosion resistance is reduced during the welding process. Corrosion forms of austenitic steels during welding include: integral, local, and intergranular corrosion. A domestic factory introduces foreign drying equipment. The stainless steel frame of the bag filter has caused intergranular corrosion due to the improper welding method, which destroys the structure of the material. The material contains acidic components during the drying process, and the steel frame quickly breaks.