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10229 Effects of Cold Work on the Corrosion Susceptibility of Steam Generator Tubing Alloy

Picture for 10229 Effects of Cold Work on the Corrosion Susceptibility of Steam Generator Tubing Alloy
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Product Number: 51300-10229-SG
ISBN: 10229 2010 CP
Author: Renkang Zhu, Baotong Lu, Jingli Luo and Yucheng Lu
Publication Date: 2010
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The cold work effect on the corrosion susceptibility of UNS N08800 alloy is studied using scanning electrochemical microscopy (SECM) and nanoindentation techniques. The indent was used to introduce the localized plastic deformation An increased reactivity was detected under SECM at the bottom surface of some indents, implying that plastic deformation reduces the corrosion resistance of the alloy material under simulated steam generator crevice chemistry conditions. The in-situ nanoindentation measurements indicated that the effect of corrosion-induced surface plasticity was more pronounced in the cold worked material. These observations suggest that a cold worked material may enhance the SCC susceptibility of material under service conditions.

Key words: Cold work, Surface hardness, Surface reactivity
The cold work effect on the corrosion susceptibility of UNS N08800 alloy is studied using scanning electrochemical microscopy (SECM) and nanoindentation techniques. The indent was used to introduce the localized plastic deformation An increased reactivity was detected under SECM at the bottom surface of some indents, implying that plastic deformation reduces the corrosion resistance of the alloy material under simulated steam generator crevice chemistry conditions. The in-situ nanoindentation measurements indicated that the effect of corrosion-induced surface plasticity was more pronounced in the cold worked material. These observations suggest that a cold worked material may enhance the SCC susceptibility of material under service conditions.

Key words: Cold work, Surface hardness, Surface reactivity
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