Abstract
In this study, the pitting corrosion susceptibility and its role on the hydrogen embrittlement behaviour of AZ80 magnesium alloy were studied using slow strain rate testing (SSRT), electrochemical technique and immersion test method. The electrochemical and immersion tests in chloride-containing solution revealed severe pitting corrosion in the alloy. The SSRT results of the alloy under continuously-exposed conditions in chloride-containing solution and in distilled water showed that the mechanical properties of the alloy deteriorated considerably in both the solutions. Pre-exposure of the alloy in distilled water did not show any considerable change in the mechanical properties of the alloy, however in chloride-containing solution a significant loss in the mechanical properties was noticed. Cleavage facets were observed in the vicinity of the localized attacked region of the alloy pre-exposed in chloride-containing solution. Interestingly, desiccating the pre-exposed (in chloride-containing solution) samples reduced the loss in the mechanical properties, which could be attributed to reversible hydrogen. Thus, the study suggests that pitting corrosion facilitates hydrogen entry into the alloy and causes hydrogen embrittlement.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
