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Common troubles and treatments of stainless steel welded water tanks

Apr 11, 2017

Because of the widespread chlorine ion (Cl-) in the industrial and living water, the metallic hot water containers are always in the corrosive environment of the Cl-water under 80 ℃, which is prone to localized corrosion and limited their service life. Compared with homogeneous corrosion (chemical corrosion), local corrosion (electrochemical corrosion) speed is much faster, the danger is much larger, often lead to leakage failure. In the water containing Cl-medium, the most vulnerable to corrosion of stainless steel tanks is the welding zone, because the area by the high-temperature heating, microstructure and performance degradation, corrosion resistance also decreased.

Stainless steel tank material is generally CR stainless steel, because of the material without nickel, the water tank welding site in the process of use of corrosion leakage problems are more common. The traditional method of repairing welding is difficult, the influence of heating stress can cause more damage; brush epoxy resin corrosion resistant material due to the surface adhesion and expansion coefficient of performance impact, or will appear cracking, peeling and other phenomena aggravating corrosion. Aiming at different equipments, different operating states, different corrosion leakage forms, adopting the corresponding technical products, it can be fast, simple and effective protection equipment, especially because of the chemical corrosion resistance of polymer composites. The adhesive performance, such as the comprehensive performance, avoids the traditional repair welding and the protection of traditional corrosion-resistant materials, so that the repair of equipment life or even more than the new equipment, fundamentally solve the cause of corrosion leakage, to help enterprises improve equipment management level, reduce maintenance costs, Improve the competitiveness of enterprises.