International Hydrogen Conference (IHC 2016): Materials Performance in Hydrogen Environments
Development of an In Situ Measuring Cell to Non-Destructive, Local Measurement of Diffusible Hydrogen Content in Steels
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Cubic body-centered, high-strength steels with a tensile strength over 800-1000 MPa are particularly suspectible to hydrogen induced delayed cracking. The reason for such material-damages is a certain concentration of diffusible hydrogen existing in the metal matrix. The analysis of this hydrogen content is therefore necessary for a safe application of high-strength components. Conventional methods of analysis destroy the component to be examined, provide just integral data of the whole measured sample volume and gather harmless hydrogen at high temperatures (molecular or constrained in traps). The electrochemical measuring method shown here reveals that the diffusible hydrogen content can be determined by non-destructive measurement of oxidation current and correlation with exact measurement techniques as HCA (Hydrogen Collecting Analysis).