Yan Yonghui, Liu Xiaoli, Xiong Hanqing, Zhou Jun, Yu Hui, Qin Chunling, Wang Zhifeng
School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300401, China.
School of Materials Science and Engineering, Hebei University of Science & Technology, Shijiazhuang 050018, China.
Nanomaterials (Basel). 2020 May 15;10(5):947. doi: 10.3390/nano10050947.
Mg-based metallic glasses (MGs) are widely studied due to their high elasticity and high strength originating from their amorphous nature. However, their further application in many potential fields is limited by poor corrosion resistance. In order to improve this property, an MgO nanoplate array layer is first constructed on the surface of Mg-based MGs by cyclic voltammetry (CV) treatments. In this situation, the corrosion resistance and hydrophilicity of the material are enhanced. Then, stearic acid (SA) can effectively adhere onto the surface of the MgO layer to form a superficial hydrophobic film with a water contact angle (WCA) of 131°. As a result, the SA coated MgO hydrophobic film improves the corrosion resistance of Mg-based MGs in 3.5 wt.% NaCl solution obviously. In addition, the effects of four technological parameters (solution concentration, sweep rate, cycle number, and reaction temperature) in the CV process on the morphology and size of nano-products are investigated in detail. The work proposes a new method for the creation of nanostructures on the surface of materials and provides a new idea to increase the corrosion resistance of MGs. The related method is expected to be applied in wider fields in future.
镁基金属玻璃（MGs）因其非晶态本质所具有的高弹性和高强度而受到广泛研究。然而，其在许多潜在领域的进一步应用受到耐腐蚀性差的限制。为了改善这一性能，首先通过循环伏安法（CV）处理在镁基金属玻璃表面构建了氧化镁纳米片阵列层。在这种情况下，材料的耐腐蚀性和亲水性得到增强。然后，硬脂酸（SA）能够有效地附着在氧化镁层表面，形成水接触角（WCA）为131°的表面疏水膜。结果，涂覆硬脂酸的氧化镁疏水膜显著提高了镁基金属玻璃在3.5 wt.%氯化钠溶液中的耐腐蚀性。此外，还详细研究了循环伏安过程中四个工艺参数（溶液浓度、扫描速率、循环次数和反应温度）对纳米产物形态和尺寸的影响。这项工作提出了一种在材料表面创建纳米结构的新方法，并为提高金属玻璃的耐腐蚀性提供了新思路。预计相关方法未来将在更广泛的领域得到应用。
