A hydrophobic coating with superior corrosion resistance via anodizing and organic immersion treatment on TiB2/7050-Al composite

IF 2 4区材料科学 Q3 MATERIALS SCIENCE, COATINGS & FILMS

Thin Solid Films Pub Date : 2025-08-06 DOI:10.1016/j.tsf.2025.140766

Jie Huang , Zhiping Wang , Yue Gong , Yixiang Xu , Jiaqiang Chang , Zhaohe Gao , Zhaoxuan Wu , Mingliang Wang , Haowei Wang

{"title":"A hydrophobic coating with superior corrosion resistance via anodizing and organic immersion treatment on TiB2/7050-Al composite","authors":"Jie Huang , Zhiping Wang , Yue Gong , Yixiang Xu , Jiaqiang Chang , Zhaohe Gao , Zhaoxuan Wu , Mingliang Wang , Haowei Wang","doi":"10.1016/j.tsf.2025.140766","DOIUrl":null,"url":null,"abstract":"<div><div>A hydrophobic coating was fabricated on the surface of TiB<sub>2</sub>/7050-Al composite through a two-step process involving aluminum anodizing oxidation (AAO) followed by stearic acid (SA) immersion treatment. Compared to the uncoated TiB<sub>2</sub>/7050-Al composite, the hydrophobic coating demonstrated significantly enhanced corrosion resistance, as evidenced by electrochemical testing and salt spray corrosion testing exceeding 300 h. The coated surface exhibited a contact angle of 115.6°, with corrosion resistance improved by an order of magnitude. This enhancement was attributed to the transition from hydrophilic to hydrophobic surface wettability, resulting from the formation of aluminum stearate on the surface. Meanwhile, with the increase in stearic acid concentration, the corrosion potential of the coating initially shifted towards positive direction and then towards negative direction, while the corrosion current density initially decreased and then increased. The corrosion resistance of the coating was optimal when the concentration of stearic acid was 0.75 mol/L. The relative mechanism and coating microstructure were discussed and characterized by multi methods. This work presented an effective approach to significantly enhance the corrosion resistance of protective coatings on Al matrix composites.</div></div>","PeriodicalId":23182,"journal":{"name":"Thin Solid Films","volume":"826 ","pages":"Article 140766"},"PeriodicalIF":2.0000,"publicationDate":"2025-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Thin Solid Films","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0040609025001658","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MATERIALS SCIENCE, COATINGS & FILMS","Score":null,"Total":0}

引用次数: 0

Abstract

A hydrophobic coating was fabricated on the surface of TiB₂/7050-Al composite through a two-step process involving aluminum anodizing oxidation (AAO) followed by stearic acid (SA) immersion treatment. Compared to the uncoated TiB₂/7050-Al composite, the hydrophobic coating demonstrated significantly enhanced corrosion resistance, as evidenced by electrochemical testing and salt spray corrosion testing exceeding 300 h. The coated surface exhibited a contact angle of 115.6°, with corrosion resistance improved by an order of magnitude. This enhancement was attributed to the transition from hydrophilic to hydrophobic surface wettability, resulting from the formation of aluminum stearate on the surface. Meanwhile, with the increase in stearic acid concentration, the corrosion potential of the coating initially shifted towards positive direction and then towards negative direction, while the corrosion current density initially decreased and then increased. The corrosion resistance of the coating was optimal when the concentration of stearic acid was 0.75 mol/L. The relative mechanism and coating microstructure were discussed and characterized by multi methods. This work presented an effective approach to significantly enhance the corrosion resistance of protective coatings on Al matrix composites.

查看原文本刊更多论文

通过阳极氧化和有机浸泡处理，在TiB2/7050-Al复合材料上制备了具有优异耐腐蚀性能的疏水涂层

采用铝阳极氧化(AAO) +硬脂酸（SA）浸泡处理两步法制备了TiB2/7050-Al复合材料表面的疏水涂层。电化学测试和超过300 h的盐雾腐蚀测试表明，与未涂覆的TiB2/7050-Al复合材料相比，疏水涂层的耐蚀性显著增强。涂层表面的接触角为115.6°，耐蚀性提高了一个数量级。这种增强归因于从亲水性到疏水性的表面润湿性的转变，这是由硬脂酸铝在表面上形成的。同时，随着硬脂酸浓度的增加，涂层的腐蚀电位先向正方向移动后向负方向移动，腐蚀电流密度先减小后增大。当硬脂酸浓度为0.75 mol/L时，涂层的耐蚀性最佳。采用多种方法对其机理和涂层组织进行了探讨和表征。为提高铝基复合材料防护涂层的耐蚀性提供了一条有效途径。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Thin Solid Films 工程技术-材料科学：膜

CiteScore

4.00

自引率

4.80%

发文量

381

审稿时长

7.5 months

期刊介绍： Thin Solid Films is an international journal which serves scientists and engineers working in the fields of thin-film synthesis, characterization, and applications. The field of thin films, which can be defined as the confluence of materials science, surface science, and applied physics, has become an identifiable unified discipline of scientific endeavor.