A Mg alloy with no hydrogen evolution during dissolution

Hydrogen evolution is normally associated with the corrosion or dissolution of Mg alloys in aqueous solutions. This work studied the corrosion behavior of sputtered pure Mg, Mg 82 Zn 18 (at.%), Mg 64 Zn 36 (at.%), and pure Zn in 3.5% NaCl solution. Mg 64 Zn 36 had (i) an amorphous microstructure with some nano-scale grains, (ii) a corrosion rate substantially lower than that of pure Mg, and (iii) no hydrogen evolution during corrosion or anodic dissolution, because the positive corrosion potential retarded the cathodic hydrogen evolution. This is a new route to prevent hydrogen evolution during Mg corrosion, which has never previously been realized. & COPY; 2021 Chongqing University. Publishing services provided by Elsevier B.V. on behalf of KeAi Communications Co. Ltd. This is an open access article under the CC BY-NC-ND license ( http://creativecommons.org/licenses/by-nc-nd/4.0/ ) Peer review under responsibility of Chongqing University

Automated summary

This study investigated the corrosion behavior of different alloys in a salt solution and found that Mg 64 Zn 36 alloy has an amorphous microstructure, lower corrosion rate, and no hydrogen evolution during corrosion. This is a new approach to prevent hydrogen evolution during Mg alloy corrosion.