The corrosion behavior of several nickel alloys was examined in laboratory tests designed to evaluate materials for H2S service. Resistance to hydrogen embrittlement, sulfide stress-corrosion cracking and chloride stress-corrosion cracking was evaluated. Cathodically charged tensile specimens and steel-coupled C-rings were used to characterize hydrogen embrittlement in a 5% NaCl/0.5% acetic acid solution saturated with H2S. C-rings in 15% to 25% sodium chloride solutions containing H2S and CO2 were used to study stress-corrosion cracking at elevated temperatures of 177°C (350°F) and 204°C (400°F). The results indicate that hydrogen embrittlement is best resisted by cold- worked or age-hardened alloys having yield strengths under 1103 MPa (160 ksi). For resistance to chloride stress-corrosion cracking, alloys with more than 40% nickel should be used.

Subject
Hydrogen embrittlement, Materials, Nickel based alloys, Tubes, Molybdenum alloys, Commercial alloys, Sodium chloride solution, C ring stress corrosion testing, Aluminum alloys, Alloys, Yield strength, Hydrogen, Chloride stress corrosion cracking
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1982
Association for Materials Protection and Performance (AMPP)
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