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Comparison of stress corrosion cracking behavior of Fe13Cr5Ni- and Fe17Cr5.5Ni- based high chromium stainless steels in HPHT CO2 environments

The stress corrosion cracking (SCC) behavior of Fe13Cr5Ni- and Fe17Cr5.5Ni-based alloys in HTHP CO2 environments was investigated through slow strain rate tests (SSRT) and electrochemical methods. The results show that a remarkable decrease in tensile strength and elongation to failure was observed when testing in CO2 environment as compared with air. Fe17Cr5.5Ni-based alloys possessed better SCC resistance than Fe13Cr5Ni-based alloys. The increase of Cr and Ni content tended to enhance the resistance to SCC and pitting corrosion. The SCC behaviors of Fe13Cr5Ni- and Fe17Cr5.5Ni-based alloys were closely associated with the repassivation capacity and the resistance to pitting corrosion.

Product Number: 51320-14695-SG
Author: Yameng Qi, Chunxia Zhang, Zhonghua Zhang
Publication Date: 2020
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