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| THE ELECTROCHEMICAL BEHAVIOR WITHIN SCC CRACKS OF 30CrMnSi STEEL |
| He Yedong Yu Zongji (Beijintt Institute of Aeronautics & Astronautics) |
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Cite this article:
He Yedong Yu Zongji (Beijintt Institute of Aeronautics & Astronautics). THE ELECTROCHEMICAL BEHAVIOR WITHIN SCC CRACKS OF 30CrMnSi STEEL. J Chin Soc Corr Pro, 1988, 8(2): 141-147.
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Abstract The electrochemical behavior within the SCC cracks of 30CrMnSi steel in 3.5％NaCl solution or in 5％K_2Cr_2O_7+0.1％NaCl solution was studied. The distribution of potential, pH value and Cl~- concentration under different polarized potentials was measured. It was found that the crack tip potential versus pH value and the potential-versus Cl~- concentration relationships are both linear. Based on the electrochemical model of microcell and multi-electrode system, the electrochemical difference between corrosion crack and crevice was explained and the correlation between electrochemical behavior within the crack and the cracking sensitivity was established.
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Received: 25 April 1988
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