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Abstract Electrochemical method was used to study the effects of the passive film, polarization potential and the pH value of the solution on the permeation behavior of hydrogen in a stable austenitic stainless steel 310. The diffusion coefficient of hydrogen at 25℃ in this steel was determined to be(1.2+0.1)×10~-8cm~2/sec,and that of the passive film was estimated to be about 10~(-17)cm~2/sec. The saturated hydrogen permeation current increased with the decrease of the pH value of the solution; it also increased not only with the increase of cathodic polarization potential, but also with the increase of anodic polarization potential if it is above the breakdown potential of the passive film. The anodic polarization curves of the hydrogen charged specimens in 0.1N H_2SO_4 solution were shifted to the right, i. e., hydrogen increases the anodic reactivity of the austenitic stainless steel. Furthermore, hydrogen charged solution treated specimens exhibited a tendency toward intergranular corrosion.
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Received: 25 June 1984
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Cite this article:
Zhao Keqing (Anshan Research Institute of Iron and Steel) Xiao Jimei Hu Maopu (Beijing University of Iron and Steel Technology). INVESTIGATION ON THE PERMEATION BEHAVIOR OF HYDROGEN IN STABLE AUSTENITIC STAINLESS STEEL. J Chin Soc Corr Pro, 1984, 4(3): 179-186.
URL:
https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1984/V4/I3/179
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