Abstract Based on a two-step plasma surface activation process (O2 followed by N2 plasma), silk fibroin coating was prepared on Mg-Zn-Ca alloy without conversion layer to retard the corrosion. This method achieved homogenized surfaces with better hydrophilicity and increased functional groups, significantly improving the adhesion force. The corrosion resistance of coated magnesium alloy was significantly enhanced compared to that of bare samples. Nanoscratch combined with corrosion behavior indicated that the remarkably improvement of anticorrosion ability attributed to the protective layer and the increased adhesion force. Our findings provided more possibilities for corrosion protection of degradable metals.

中文翻译：

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通过两步等离子体活化增强丝素蛋白涂层的可生物降解 Mg-Zn-Ca 合金的粘附和防腐

摘要 基于两步等离子体表面活化工艺（O2后N2等离子体），在Mg-Zn-Ca合金上制备了丝素蛋白涂层，没有转化层以延缓腐蚀。该方法实现了具有更好亲水性和更多官能团的均质表面，显着提高了粘附力。与裸试样相比，涂层镁合金的耐腐蚀性能显着提高。纳米划痕结合腐蚀行为表明，由于保护层和附着力的增加，防腐能力的显着提高。我们的发现为可降解金属的腐蚀保护提供了更多可能性。