Paper Title:
Stress Corrosion Cracking of Alloy 600 in a High-Temperature Water Containing Sulfate and Thiosulfate
  Abstract

The stress corrosion cracking (SCC) susceptibility of Alloy 600 MA has been studied in deaerated 0.01 M sodium sulfate (Na2SO4) and sodium thiosulfate (Na2S2O3) solutions at 340°C. Pre-strained reverse U-bend (RUB) specimens are tested using a static-autoclave system. The specimens show an intergranular SCC and a higher resistance to SCC in a Na2S2O3 solution than in a Na2SO4 solution. The results of the deposits and surface analyses by using XRD and SEM/EDS confirm the existence of the sulfides. The SCC of Alloy 600 MA is associated with the reduced sulfur species and protective oxide film properties formed on the alloy surface in the Na2SO4 and Na2S2O3 solutions.

  Info
Periodical
Key Engineering Materials (Volumes 277-279)
Edited by
Kwang Hwa Chung, Yong Hyeon Shin, Sue-Nie Park, Hyun Sook Cho, Soon-Ae Yoo, Byung Joo Min, Hyo-Suk Lim and Kyung Hwa Yoo
Pages
644-648
DOI
10.4028/www.scientific.net/KEM.277-279.644
Citation
E. H. Lee, K. M. Kim, U. C. Kim, "Stress Corrosion Cracking of Alloy 600 in a High-Temperature Water Containing Sulfate and Thiosulfate ", Key Engineering Materials, Vols. 277-279, pp. 644-648, 2005
Online since
January 2005
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