Effect of Temperature and Electrolyte Composition on the Susceptibility of Alloy 22 to Localized Corrosion

Day, S.D. ; Evans, K.J. ; Ilevbare, G.O.

United States. Department of Energy. Yucca Mountain Project Office.

关键词: Fluorides;    Nitrates;    36 Materials Science;    Electrochemical Corrosion;    Electrolytes;   

DOI  :  10.2172/808030
RP-ID  :  NONE
RP-ID  :  NONE
RP-ID  :  808030

美国|英语

来源: UNT Digital Library

【 摘 要 】

The study of the electrochemical behavior of Alloy 22 has been carried out in various concentrated environments using different sample configurations. Comparisons were made between the electrochemical behaviors of Alloy 22 in concentrated chloride solutions, and in concentrated chloride solutions with nitrate ions (NO{sub 3}{sup -}). In other experiments, the effect of fluoride ions (F{sup -}) was investigated. These comparative studies were performed at various temperatures. The rate of corrosion was found to increase with increase in temperature. The presence of nitrate ions reduced corrosion attack on Alloy 22. F{sup -} was found to be more benign to Alloy 22 compared with chloride ions (Cl{sup -}). However a combination of F{sup -} and Cl{sup -} was found to initiate deeper crevices compared with the only Cl{sup -} in the electrolyte.