Effect of Microstructure on Layered Double Hydroxides Film Growth on Mg-2Zn-xMn Alloy
Source abstract
Abstract
The poor corrosion resistance of magnesium (Mg) alloys significantly restricts their wide applications. The preparation of a layered double hydroxides (LDHs) film can provide effective corrosion protection for Mg alloys. Nevertheless, research on the effect of the Mg alloy microstructure on LDHs film growth is paid less attention, which was studied in detail in this work. Herein, a Mg-2Zn-xMn alloy with different Mn contents was produced, and an LDHs film was then synthesized on their surfaces. The addition of Mn causes a different microstructure in the Mg-2Zn-xMn alloy, which is gradually refined with increasing Mn content, further affecting the surface morphology, surface chemistry, and corrosion protection of the LDHs film. When the Mn content is 1 wt.% (x = 1), the LDHs film presents the best corrosion protection, with the lowest corrosion current density. No obvious corrosion product could be observed by the naked eyes on the surface. By contrast, severe corrosion occurs on the Mg-2Zn-0Mn alloy (x = 0). Finally, the LDHs film growth mechanism was proposed.
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Research context
OpenAlex topics: Magnesium Alloys: Properties and Applications · Layered Double Hydroxides Synthesis and Applications · Corrosion Behavior and Inhibition
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400044, China
Funding
National Natural Science Foundation of China · Chongqing Postdoctoral Scientific Research Foundation
References (23)
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