2009•Pressure vessel TechnologyRequires access
Study on the Corrosion Resistance of Hastelloy C-2000 Alloy
DU Dong-xing
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Abstract
Intergranular corrosion,pitting and stress corrosion cracking(SCC) behaviors of Hastelloy C-2000 alloy were studied by experiments.The effect of environment factors,stress and solution heat treatment on SCC susceptivity of the alloy was evaluated.The result shows that Hastelloy C-2000 alloy has high resistance to general corrosion and SCC in acidic NaCl solution at room temperature.However,the alloy has higher intergranular corrosion susceptivity,and the welded joint has remarkable selective corrosion at heat-affected zone in sulfuric acid and ferric sulfate mixed solution due to the rich Mo precipitated phase.Shot peening and solution heat treatment can improve the resistance of general corrosion and SCC of the alloy matrix and welded joint.