Cooling tower material generally is given priority to with carbon steel, stainless steel and copper, carbon steel material of the tube plate when used as
cooling tower, the tube plate and the column tube weld corrosion leakage often occurs, the leakage into the cooling water system will result in environmental pollution and the waste materials.
Cooling tower, which of the tubesheet and shell and tube welding general use manual arc welding, weld shape defects of different level, such as depression, porosity, slag, weld stress distribution is not uniform.
When using tube plate parts contact with industrial cooling water, and the impurities in the industrial cooling water, salt, gas, microbes can constitute the corrosion of tube plate and weld.
Studies have shown that both fresh water and sea water, industrial water will have all kinds of ions and dissolved oxygen, especially the change of chloride ions and oxygen concentration, play an important role on the corrosion of the metal shape.
In addition, the complexity of the metal structure will also affect the corrosion morphology.
According to cooling tower anticorrosive problem, traditional methods is given priority to with repair welding, the repair welding is easy to make the tube plate internal stress is generated, it is difficult to eliminate, may cause leakage of cooling tower tubesheet weld again.
The current western countries adopt the method of polymer composite materials for their own protection.
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