镁合金超疏水环氧复合涂层的制备与性能
Preparation and properties of superhydrophobic epoxy composite coatings on magnesium alloys
查看参考文献28篇
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文摘
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传统的超疏水表面的制备过程比较复杂,机械稳定性差,这严重制约了超疏水表面的实际应用。采用“黏合剂+纳米粒子”的方法,在镁合金表面制备一种无氟、持久稳定的超疏水环氧复合涂层。接触角测试结果表明,复合涂层的接触角最高可达160.2°,且在3.5%(质量分数)NaCl溶液中浸泡30天后,接触角仍然高达103°;EIS结果表明,在5个加速老化循环周期后,复合涂层的|Z|_(0.01Hz)仍高于109Ω·cm~2,展现出优异的耐盐雾性能和耐蚀性能;摩擦磨损实验结果显示,在19.6N的载荷下机械摩擦8h后,复合涂层的|Z|_(0.01Hz)高达1.84×10~9Ω·cm~2。通过“空气垫”的屏障作用,复合涂层能够为镁合金提供高效且持久的腐蚀防护,“黏合剂+纳米粒子”策略为超疏水涂层的制备提供了新的思路。 |
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其他语种文摘
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The traditional preparation process of superhydrophobic surfaces(SHS)is complicated and the mechanical stability of SHS is less than satisfactory in most cases,which seriously restricts the practical application.The“binder+nanoparticles”strategy was used to prepare a nonfluorinated, durable and stable superhydrophobic epoxy composite coating on magnesium alloy.The contact angle test results show that the maximum contact angle of the composite coating is 160.2°,and the contact angle is still as high as 103°even after 30days of soaking in 3.5%(mass fraction)NaCl solution;EIS results indicate that the |Z|_(0.01Hz) of the composite coating is still above 109 Ω·cm~2 even after five accelerated aging cycles,demonstrating excellent resistance to salt fog and anticorrosion performance; Friction and wear test results reveal that the |Z|_(0.01Hz) of the composite coating is as high as 1.84×10~9 Ω·cm~2 after mechanical friction under 19.6Nload for 8h.Due to the excellent blocking barrier of “air cushion”,the composite coating can provide efficient and durable corrosion protection for magnesium alloy and the “adhesive+nanoparticles”strategy provides a new direction for the preparation of superhydrophobic coating. |
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来源
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材料工程
,2022,50(8):124-132 【核心库】
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DOI
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10.11868/j.issn.1001-4381.2021.001109
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关键词
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镁合金
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超疏水涂层
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腐蚀防护
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环氧涂层
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地址
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1.
上海航天精密机械研究所, 上海, 201600
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华中科技大学化学与化工学院, 武汉, 430074
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宁东能源化工基地管委会, 银川, 750411
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1001-4381 |
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学科
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原子能技术 |
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基金
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国家自然科学基金
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文献收藏号
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CSCD:7308150
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