Corrosion Behavior of TP304 Stainless Steel Condenser Tubes in Different Operation Conditions

Potentiodynamic anodic polarization was adopted to detect the pitting potentials of TP304 stainless steel condenser tubes in different operation conditions and the law of pitting was achieved. The results proved that TP304 stainless steel had excellent resistance to pitting under normal operation and scaling conditions of condensers,without rapid corrosion perforation on large areas. When different amounts of hydrochloric acid added to circulating water,the pitting resistance of TP304 stainless steel varied in aerobic condition:it was fine when the hydrochloric acid concentration was 0.03%;rapid corrosion perforation occurred when the concentration was 0.07% or 0.2%;rapid uniform corrosion thinning mainly occurred when the concentration was 0.5%. Based on the analysis results,some recommendations have been proposed to prevent corrosion leakage of TP304 stainless steel tubes for condenser.