Plate heat exchanger plates are used in plate heat exchangers to isolate media and perform heat exchange. They are an important part of plate heat exchangers. Its main materials are stainless steel (SUS304.316), titanium and titanium palladium (Ti, Ti-Pd), 20Cr, 18Ni, 6Mo (254SMO), alloy (C276) and copper (H68).What are the corrosion protection measures for stainless steel plate heat exchangers?
(1) Certain conditions are required for chloride ion pitting in stainless steel plate heat exchangers. When the chloride ion concentration in water is less than 2 μg / g, pitting is difficult to occur. Therefore, controlling the concentration of chloride ions in the water not exceeding the standard is a more effective and fundamental way to prevent pitting corrosion of stainless steel plates.
(2) When the stainless steel plate heat exchanger is cleaning the plate, the surface of the plate is damaged due to improper methods. It destroys the original protective film, increases the surface roughness, and increases the corrosion rate.Therefore, you cannot use a sharp tool to scrape the scars on the surface of the plate, nor can you use a cleaning agent containing hydrochloric acid. The result of this method is that the plate is cleaned and looks new, but the surface of the plate is not shiny and feels rough. This method is very harmful to the plate and should be prohibited.