Ten case histories are cited to show ways in which cathodic protection principles can be applied to chemical process equipment. Materials and items of equipment for which case histories are reported include a Type 316 stainless steel cooling coil in sodium hypochlorite, lead pipe coils in barium chloride, mild steel in chemically pure 73 percent caustic, reactor cells in 10 percent hydrochloric acid, Type 302 stainless steel in dilute sulfuric acid-organic acid mixture, copper steam coils in zinc chloride, and copper heating coils in ammonium chloride.
Criteria for protection were found to differ considerably from that generally accepted for iron or steel in substantially neutral environments. Although process applications usually require laboratory development, cathodic protection may often provide an economical solution to corrosion problems. 5.2.4
