Electrochemical Interpretation of a Stress Corrosion Cracking of Thermally Treated Ni Base Alloys in a Lead Contaminated Water-Reference-Cited by-同舟云学术

Electrochemical Interpretation of a Stress Corrosion Cracking of Thermally Treated Ni Base Alloys in a Lead Contaminated Water

Published:2007-06 Issue: Volume:124-126 Page:1545-1548
ISSN:1662-9779
Container-title:Solid State Phenomena
language:
Short-container-title:SSP

Author:

Hwang Seong Sik¹,Lim Yun Soo¹,Kim Hong Pyo¹,Kim Joung Soo¹,Thomas Larry²

Affiliation:

1. Korea Atomic Energy Research Institute

2. Pacific Northwest National Laboratory

Abstract

Since the PbSCC(Lead stress corrosion cracking) of alloy 600 tubing materials was reported by Copson and Dean in 1965, the effect of lead on a corrosion film and cracking morphology have been continually debated. An electrochemical interaction of lead with the alloying elements of SG tubings was studied and the corrosion products were analyzed. It was found that lead enhanced the anodic dissolution of alloy 600 and alloy 690 in the electrochemical test. The lead preferentially dissolved the Cr from the corrosion film of alloy 600 and alloy 690 in alkaline water. The lead ion seemed to penetrate into the TG crack tip and react with the corrosion film. A selective Cr depletion was observed to weaken the stability of the passive film on the alloys. Whereas passivity of Ni became stable in lead containing solution, Cr and Fe passivity became unstable.

Publisher

Trans Tech Publications, Ltd.

Subject

Condensed Matter Physics,General Materials Science,Atomic and Molecular Physics, and Optics

Link

https://www.scientific.net/SSP.124-126.1545.pdf

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