One saltwater treatment session: regarding the corrosion resistance of electromagnetic flowmeters with carbon steel + polyester paint, or those made of stainless steel
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This post was last edited by sunjl1981 on 2013-1-6 23:47. In the PVC process, during the treatment of brine, corrosion-resistant tantalum electrodes or HAC electrodes are used for measuring both the brine and FeCl3. In such a working environment, for the housing and flanges of electromagnetic flowmeters, should we choose carbon steel with polyester paint or stainless steel? Because saltwater and FeCl3 are highly corrosive, although under favorable conditions there should be no problems with the materials used for the casing and flanges, in adverse environments, which of these two methods is more suitable? After all, stainless steel flanges or enclosures cannot withstand the corrosion caused by these two types of media. If there is a medium leakage or environmental corrosion, which option is better? # + + .
The original poster is referring to chlor-alkali processes, not PVC. Seawater and ferric chloride cause similar corrosion to carbon steel and stainless steel, including the vapor from seawater; therefore, anti-corrosion materials must be used on the surface of steel