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Endowing magnesium with the corrosion-resistance property through cross-linking polymerized inorganic sol–gel coating
RSC Advances ( IF 3.9 ) Pub Date : 2021-1-22 , DOI: 10.1039/d0ra09408k Wei Wang 1 , Xiao-Na Yang 1 , Yang Wang 1 , Yong Fan 1 , Jia-Ning Xu 1
RSC Advances ( IF 3.9 ) Pub Date : 2021-1-22 , DOI: 10.1039/d0ra09408k Wei Wang 1 , Xiao-Na Yang 1 , Yang Wang 1 , Yong Fan 1 , Jia-Ning Xu 1
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The design of a highly adhesive, defect-free and low-temperature sol–gel coating for the protection of magnesium alloys is desirable yet challenging. In this study, a novel SiO2-based sol–gel coating is developed by a ring-opening addition reaction. Notably, the integration of individual sol clusters endows the sol–gel coating with a smooth and compact surface morphology, and eliminates the potential corrosion site of the low-temperature-prepared sol–gel coating. Besides, the as-obtained sol–gel coating exhibits excellent metallic adhesion nature. Most importantly, it increases the overall impedance modulus by 27 times than that of the conventional strategy and decreases the corrosion rate from 3.8 ± 0.5 mg cm−2 per day (commercial chromate conversion coating) to 0.5 ± 0.2 mg cm−2 per day.
中文翻译：
通过交联聚合无机溶胶凝胶涂层赋予镁耐腐蚀性能
用于保护镁合金的高附着力、无缺陷和低温溶胶-凝胶涂层的设计是理想但具有挑战性的。在本研究中，通过开环加成反应开发了一种新型SiO 2基溶胶-凝胶涂层。值得注意的是，各个溶胶簇的整合赋予溶胶-凝胶涂层光滑致密的表面形貌，并消除了低温制备的溶胶-凝胶涂层的潜在腐蚀位点。此外，所获得的溶胶凝胶涂层表现出优异的金属附着力。最重要的是，它使整体阻抗模量比传统策略提高了27倍，并将腐蚀速率从每天3.8 ± 0.5 mg cm -2 （商业铬酸盐转化涂层）降低到每天0.5 ± 0.2 mg cm -2 。
更新日期：2021-01-22
中文翻译：
通过交联聚合无机溶胶凝胶涂层赋予镁耐腐蚀性能
用于保护镁合金的高附着力、无缺陷和低温溶胶-凝胶涂层的设计是理想但具有挑战性的。在本研究中，通过开环加成反应开发了一种新型SiO 2基溶胶-凝胶涂层。值得注意的是，各个溶胶簇的整合赋予溶胶-凝胶涂层光滑致密的表面形貌，并消除了低温制备的溶胶-凝胶涂层的潜在腐蚀位点。此外，所获得的溶胶凝胶涂层表现出优异的金属附着力。最重要的是，它使整体阻抗模量比传统策略提高了27倍，并将腐蚀速率从每天3.8 ± 0.5 mg cm -2 （商业铬酸盐转化涂层）降低到每天0.5 ± 0.2 mg cm -2 。
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