Initial micro-galvanic corrosion behavior between Mg2Ca and α-Mg via quasi-in situ SEM approach and first-principles calculation
Galvanic cell
Galvanic anode
Immersion
Galvanic corrosion
DOI:
10.1016/j.jma.2021.06.017
Publication Date:
2021-07-24T11:07:31Z
AUTHORS (7)
ABSTRACT
The initial micro-galvanic corrosion behavior of Mg‒30wt%Ca alloy only containing Mg2Ca and α-Mg was studied by immersion testing in a 0.9% NaCl solution at 37 °C. quasi-in situ SEM TEM results show that corroded easier than α-Mg, indicating acted as an anode. work function (Φ) for calculated first-principles is significantly lower compared to α-Mg. Volta potential measured scanning Kelvin probe force microscope reveals the had relatively low (ψ) value. Φ ψ values indicate electrochemical nobility, which consistent with experimental phenomenon.
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