Abstract
Anodic dissolution of steel 40Kh in a sulfuric acid electrolyte containing Cl− ions is studied by analyzing the experimental dependence of anodic current on the specimen potential. The dependences of the critical passivation current, anodic current at −0.15 to 0.55 V (Ag/AgCl), and passivation current on the concentration of Cl− ions (c) are determined. The maximum value of c for the passivation at 0.55–1.6 V (Ag/AgCl) is refined. The dependence of the specimen’s steady-state potential on c is determined and its decrease is related to an abrupt increase in the anodic current at the passivation potentials.
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