The effects of dissolved lead on the anodic dissolution behavior of Alloy 690 (UNS N06690) were experimentally investigated in an alkaline solution that is used to simulate the environment in a nuclear steam generator crevice. Lead inoculation and scratch techniques were applied to exclude the inference of the impact of oxidization of the metallic lead deposit. It has been found that lead deposit can promote transient dissolution on the bare metal surface in the alkaline crevice solution before a fully passive state is achieved. The experimental measurements suggest that the promoted transient dissolution is likely to result from the selected dissolution of nickel. The presence of dissolved lead contamination may retard the passivation or repassivation of the alloy. The effect of lead contamination is very limited on the uniform anodic dissolution of the alloy at stable passive state in the alkaline crevice solution.
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1 September 2009
Research Article|
September 01 2009
Condition for Lead-Induced Corrosion of Alloy 690 in an Alkaline Steam Generator Crevice Solution Available to Purchase
B.T. Lu;
B.T. Lu
*Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta,
Canada
T6G 2G6.
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J.L. Luo;
J.L. Luo
‡
*Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta,
Canada
T6G 2G6.‡Corresponding author. E-mail: [email protected].
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B. Peng;
B. Peng
*Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta,
Canada
T6G 2G6.
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A. Palani;
A. Palani
*Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta,
Canada
T6G 2G6.
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Y.C. Lu
Y.C. Lu
**Component Life Technology, Stn. 80, Atomic Energy of Canada Ltd., Chalk River Laboratories, Chalk River, Ontario,
Canada
K0J 1J0.
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‡Corresponding author. E-mail: [email protected].
Online ISSN: 1938-159X
Print ISSN: 0010-9312
NACE International
2009
CORROSION (2009) 65 (9): 601–610.
Citation
B.T. Lu, J.L. Luo, B. Peng, A. Palani, Y.C. Lu; Condition for Lead-Induced Corrosion of Alloy 690 in an Alkaline Steam Generator Crevice Solution. CORROSION 1 September 2009; 65 (9): 601–610. https://doi.org/10.5006/1.3319163
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