Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : December 22, 2018 - December 24, 2018
Evaluation test of high-pressure hydrogen gas should be carried out more simplified. As an alternative approach in high-pressure hydrogen gas test, to simulate the hydrogen gas environment SSRT was performed with cathodically charged. Specimen was used a low-alloy steel, SCM435 with the tensile strength of 1000 MPa. The tensile properties was evaluated with cathodic charging with 3%NaCl solution and the current density of 400 A/m2. The results of the tensile properties of the pre-charge only were almost consistent with the test results in the room temperature atmospheric pressure, the effects of hydrogen was not confirmed. On the other hand, test results were charged continuously to the tensile strength after the pre-charge, decrease in ductility due to hydrogen was observed. From the above results, hydrogen affects embrittlement are those charged in the elastic range.
