A Mg alloy with no hydrogen evolution during dissolution
Fuyong Cao, Bo Xiao, Ziming Wang, Tao Ying, Dajiang Zheng, Andrej Atrens, Guang‐Ling Song
Abstract
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, Mg82Zn18 (at.%), Mg64Zn36 (at.%), and pure Zn in 3.5% NaCl solution. Mg64Zn36 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.
Topics & Concepts
DissolutionCorrosionMaterials scienceCathodic protectionAlloyMicrostructureMetallurgyHydrogenAqueous solutionAmorphous solidAnaerobic corrosionChemical engineeringInorganic chemistryElectrochemistryChemistryPhysical chemistryElectrodeCrystallographyOrganic chemistryEngineeringMagnesium Alloys: Properties and ApplicationsHydrogen Storage and MaterialsCorrosion Behavior and Inhibition