ZHANG Huijie*,ZHANG Zhenjun.Study on Preparation a nd Corrosion Resistance of Superhydrophobic Coating on 16Mn Steel for Construction[J].Plating & Finishing,2022,(3):7-11.[doi:10.3969/j.issn.1001-3849.2022.03.002]
建筑用16Mn钢超疏水膜层的制备及耐蚀性研究
- Title:
- Study on Preparation a nd Corrosion Resistance of Superhydrophobic Coating on 16Mn Steel for Construction
- Keywords:
- superhydrophobic coating; micronano hierarchical structure; phosphating film; cerium salt passivation; stearic acid modification
- 分类号:
- TG178
- 文献标志码:
- A
- 摘要:
- 为提高建筑用 16Mn 钢的耐蚀性，采用磷化处理、铈盐钝化再经过硬脂酸修饰在 16Mn 钢表面制备出超疏水膜层。表征了膜层微观形貌和成分，并测试了表面粗糙度、水滴接触角和耐蚀性。结果表明：铈盐钝化、硬脂酸修饰后磷化膜的微观形貌、成分和表面粗糙度存在差异，导致表面润湿性和耐蚀性不同。只是通过增加表面粗糙度的方式无法制备出超疏水膜层，膜层呈亲水性或超疏水性与其耐蚀性之间存在关联性。钝化 - 修饰磷化膜表面水滴接触角达到 150.7° ，表现出超疏水性还具有良好的耐蚀性，能有效抑制 16Mn 钢腐蚀从而提高其耐蚀性。原因是钝化 - 修饰磷化膜表面形成微纳米粗糙结构，有利于俘获空气形成气垫，对腐蚀介质具有较好的阻隔作用，有效抑制腐蚀并降低腐蚀程度。
- Abstract:
- ： In order to improve the corrosion resistanc e of 16Mn steel for construction ， superhydrophobic film was prepared on the surface of 16Mn steel by phosphating treatment ， cerium salt passivation and stearic acid modification. The micro-morphology and components of the film were characterized ， and the surface roughness ， water drop contact angle and corrosion resistance were tested. The results showed that the micro-morphology ， components and surface roughness of the phosphating films were different after cerium salt passivation and stearic acid modification ， and the wettability and corrosion resistance were different. Superhydrophobic film can not be prepared only by increasing the surface roughness ， and the hydrophilicity or superhydrophobicity of the film was related to the corrosion resistance. The water drop contact angle on the surfac e of p assivation-modified phosphating film reached 150.7° ， showing superhydrophobicity and good corrosion resistance ， which can effectively inhibit the corrosion of 16Mn steel and improve its corrosion resistance. The reason was that the passivation-modified phosphating film has micro-nano rough structure ， which was conducive to capturing air and forming air cushion ， and has a good barrier effect on corrosive media ， effectively inhibiting corrosion and reducing corrosion degree.
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备注/Memo
收稿日期： 2021-07-23 修回日期： 2021-08-17 作者简介： 张慧洁（ 1983 —），女，硕士，副教授，主要研究方向：建筑材料、腐蚀与防护等， E-mail ： Szjzx0050@126.com 基金项目： 中国高等教育学会职业技术教育分会课题（ GZYYB2018149 ）、陕西省职业技术教育学会课题（ SZJZX-1803 ）