Stress Corrosion Cracking of SPV490Q Steel Weld Joints in H₂S Solution with Different Concentrations

The stress corrosion properties of SPV490Q weld joint in H2S solution with different concentrations were studied using WOL specimens.The crack propagation rate da/dt and critical stress corrosion factor KISCC of SPV490Q weld were gotten by experiments.The results show that with increasing concentration of H2S in solution the critical stress corrosion factor KISCC decreased,the stress corrosion crack propagation rate da/dt increased,and the resistance to stress corrosion cracking of SPV490Q steel weld joint in H2S solutions decreased.