|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||Energy Technologies and CO2 Management Symposium
||E-49: Enabling Corrosion-resistant Magnesium Through Cross-linking Polymerized Inorganic Sol Coatings
||Wei Wang, Xiaona Yang, Yong Fan, Xiaobo Chen
|On-Site Speaker (Planned)
Magnesium (Mg) alloys, the lightest structural materials, suffer from poor corrosion resistance. Sol-gel coating is a common method to protect Mg alloys from corrosive attacks, however, the protective efficiency is compromised owing its inherent weakness. Herein, a SiO2@ZrO2 based sol coating with defect-free and high-stability characteristics was prepared through mimicking the epoxy-curing mechanism to address the corrosion issues of pure Mg. The occurrence of cross-linking process, analogues to a compact polymer, and incorporation of stable inorganic compounds, synergically enable the resulting sol coatings strong adhesion and superior protection to Mg in NaCl solution. Post-exposure observation manifests that surface morphology and topography of the coatings remain intact and no evident corrosion products over 672 h immersion. This work illustrates a simple and effective strategy for improving corrosion-resistance of Mg-based materials.