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Influence of Heat Treatment Temperature on Corrosion Characteristics of Biodegradable EW10X04 Mg Alloy Coated with Nd
Author(s) -
Katarivas Levy Galit,
Aghion Eli
Publication year - 2016
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201500253
Subject(s) - materials science , corrosion , microstructure , alloy , intermetallic , metallurgy , polarization (electrochemistry) , chemistry
The effect of heat treatment temperature (150, 350, and 550 °C) on corrosion of biodegradable EW10X04 Mg alloy coated with Nd was tested in PBS solution. The microstructure was examined by SEM, XRD, and XPS analysis and corrosion resistancewas evaluated by immersion test,potentiodynamic polarization and EIS analysis. Comparatively the complex microstructure of the surface obtained after heat treatment at 350 °C has the best corrosion resistance. This was mainly due to the formation of a nearly continuous network of Mg 41 Nd 5 that acts as a protective barrier around α‐Mg grains. The heat treatment at 150 °C was not effective in creating a similar protective network. In the heat treatment at 550 °C, a new intermetallic phase (Mg 3 Nd)was formed having a detrimental effect on corrosion resistance.