Main factors affecting tube sheet corrosion

The main factors affecting tube sheet 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 corrode severely in sulfuric acid with a concentration of about 50%, but when the concentration increases to more than 60%, the corrosion drops sharply;

(2) Impurities: Harmful impurities include chloride ions, sulfide ions, cyanide ions, ammonia ions, etc. These impurities can cause severe corrosion in some cases;

(3) Temperature: Corrosion is a chemical reaction. When the temperature is increased by 10℃, the corrosion rate will increase by about 1 to 3 times, but there are exceptions;

(4) PH value: Generally, the smaller the PH value, the greater the corrosion of the metal;

(5) Flow rate: In most cases, the greater the flow rate, the greater the corrosion.

At present, polymer composite materials can be used to protect the tube sheet from corrosion. It 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. Shrinkage, especially the material's good isolation of bimetallic corrosion and excellent erosion resistance, excellent anti-corrosion performance, fundamentally eliminates the corrosion and leakage of the repaired part, and can provide a long-term protective coating for the components.