Main factors affecting tubesheet corrosion

The main factors affecting tubesheet corrosion are:
(1) Medium composition and concentration: the influence of concentration is different. For example, in hydrochloric acid, the greater the concentration, the more serious the corrosion. Carbon steel and stainless steel are severely corroded in sulfuric acid with a concentration of about 50%, but the corrosion decreases sharply when the concentration increases to more than 60%.

(2) Impurities: harmful impurities include chloride ion, sulfur ion, cyanide ion, ammonia ion, etc. these impurities will cause serious corrosion in some cases.

(3) Temperature: corrosion is a chemical reaction. The corrosion rate increases by about 1 - 3 times when the temperature increases by 10℃, but there are exceptions.

(4) PH value: generally, the smaller the pH value, the greater the corrosion of metal.

(5) Flow rate: in most cases, the greater the flow rate, the greater the corrosion.
At present, polymer composite materials can be used for anti-corrosion protection of tubesheet, which has excellent adhesion performance, temperature resistance and chemical corrosion resistance. The material is solid and has no volatile substances. It can be used safely in a closed environment without shrinkage. In particular, the material has good isolation bimetallic corrosion, excellent erosion resistance and excellent anti-corrosion performance. The corrosion and leakage of the repaired parts are fundamentally eliminated, which can provide a long-term protective coating for the parts.