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J Chin Soc Corr Pro  1990, Vol. 10 Issue (2): 109-118    DOI:
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EFFECT OF THIOCYANATE ION ON THE ELECTROCHEMICAL BEHAVIOR OF IRON IN THE ACIDIC PERCHLORATE AND SULPHATE SODIUM SOLUTIONS
Liang Fen Cao Chunan Lin Haichao Wang You and Zhou Shenqi (Institute of Corrosion and Protection of Metals; Academia Sinica)
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Abstract  The effect of thiocyanate ion on the electrochemical behavior of armc6 iron in deoxygenated acidic perchlorate and sodium sulphate solutions(total ionic strength 1N) has been investigated by means of galvanostatic polarization measurements under steady-state conditions. The results of investigations show that the electrochemical behavior of iron in perchlorate solutions in the absence and presence of SCN~- is identical with that obtained in the corresponding sodium sulphate solutions. In different SCN"-concentration ranges thiocyanate ion exerts quite different influence on the electrochemical behavior of iron. At low SCN"-concentration range(C_(SCN~-≤0.05N) thiocyanate ion inhibits both iron anodic dissolution and hydrogen evolution reactions, in higher SCN~-- concentration solutions(C_(SCN~-≥0.lN) thiocyanate ion acts as an accelerator for iron anodic dissolution but impedes hydrogen evolution process on iron electrode. Kinetic models which may elucidate the experimental results are proposed.
Received:  25 April 1990     
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Liang Fen Cao Chunan Lin Haichao Wang You and Zhou Shenqi (Institute of Corrosion and Protection of Metals; Academia Sinica). EFFECT OF THIOCYANATE ION ON THE ELECTROCHEMICAL BEHAVIOR OF IRON IN THE ACIDIC PERCHLORATE AND SULPHATE SODIUM SOLUTIONS. J Chin Soc Corr Pro, 1990, 10(2): 109-118.

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https://www.jcscp.org/EN/     OR     https://www.jcscp.org/EN/Y1990/V10/I2/109

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