引用本文:欧宝立,汪雨微,段俊,郭艳,支倩.BTA@SPANI-POSS环氧涂层的制备及防腐性能[J].中国表面工程,2022,35(4):161~171
Ou Baoli,Wang Yuwei,Duan Jun,Guo Yan,Zhi Qing.Preparation and Anticorrosive Performance of BTA@SPANI-POSS Epoxy Coating[J].China Surface Engineering,2022,35(4):161~171
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BTA@SPANI-POSS环氧涂层的制备及防腐性能
欧宝立1,2, 汪雨微1, 段俊1, 郭艳1, 支倩1
1.湖南科技大学材料科学与工程学院 湘潭 411201;2.高端装备界面科学与技术全国重点实验室 北京 100084
摘要:
为提高环氧涂层在腐蚀环境下的防腐性和持久性，合成一种负载有缓蚀剂苯并三唑(BTA)的苯并三唑@磺化聚苯胺功能化倍半硅氧烷(BTA@SPANI-POSS)，随后将 BTA@SPANI-POSS 与环氧树脂共混得到 BTA@SPANI-POSS 环氧涂料， 最后在 Q235 碳钢上制备数种复合环氧涂层。通过红外光谱、紫外可见光谱、扫描电子显微镜对 BTA@SPANI-POSS 的结构、 缓蚀性能、表面形貌进行表征，利用接触角测量仪、电化学工作站研究所制备涂层的疏水性能和防腐性能。研究表明，随着 SPANI-POSS 的添加，涂层沾湿性能降低。电化学阻抗谱(EIS)和塔菲尔极化曲线测试结果表明，与 SPANI-POSS 环氧涂层相比，负载有 BTA 的 BTA@SPANI-POSS 环氧涂层对金属基底具有更高和更持久的保护能力，其中试样 EB1.5%的腐蚀电流密度 icorr为 16.67 ? A·cm?2 ，其极化电阻 Rp为 2.467 M?·cm2 ，具有较低的腐蚀动态速率。在 3.5 wt.% NaCl 溶液中浸泡 15 d 后环氧涂层仍具有良好的防腐蚀效果，其阻抗值 Z0.01Hz 仍保留有第 1 d 时的 26.89%，表现出优异的长期稳定性和防腐性能。归因于 SPANI-POSS 与 BTA 之间的协同作用，所制备的 BTA@SPANI-POSS 环氧涂层在浸泡过程中与碳钢基底发生络合反应，从而起到长时间的保护作用。
关键词:  磺化聚苯胺  纳米粒子  缓蚀剂  环氧涂层  防腐性能
DOI：10.11933/j.issn.1007-9289.20210427001
分类号:TG156;TB114
基金项目:国家自然科学基金(51775183，51905167)、湖南省自然科学基金(2021JJ30259，2020JJ5197)、清华大学高端装备界面科学与技术全国重点实验室开放基金(SKLTKF21B17)和湖南省普通高等学校教学改革研究(湘教通[2019]291 号)资助项目
Preparation and Anticorrosive Performance of BTA@SPANI-POSS Epoxy Coating
Ou Baoli1,2, Wang Yuwei1, Duan Jun1, Guo Yan1, Zhi Qing1
1.School of Materials Science and Engineering, Hunan University of Science and Technology, Xiangtan 411201 , China;2.State Key Laboratory of Tribology in Advanced Equipment, Tsinghua University, Beijing 100084 , China
Abstract:
Benzotriazole (BTA) is loaded on sulfonated polyaniline functionalized polyhedral oligomeric silsesquioxane (SPANI-POSS) to obtain benzotriazole @ sulfonated polyaniline functionalized polyhedral oligomeric silsesquioxane (BTA@SPANI-POSS). Then BTA@SPANI-POSS is blended with epoxy resin to obtain BTA@SPANI-POSS epoxy coating. Finally, several composite epoxy coatings are prepared on Q235 carbon steel. The structure, slow-release properties and surface morphology of BTA@SPANI-POSS are characterized by infrared spectroscopy, ultraviolet-visible spectroscopy and scanning electron microscopy. The hydrophobic and anticorrosive properties of the coating are studied by contact angle measuring instrument and electrochemical workstation. The results show that with the addition of SPANI-POSS, the wettability of the coating decreases. The electrochemical impedance spectroscopy (EIS) and tafel curve test results show that compared with SPANI-POSS epoxy coating, BTA@SPANI-POSS epoxy coating loaded with BTA have higher and longer protection ability for metal substrate, in which the corrosion current density icorr of EB1.5% is 16.67 ? A·cm?2 , and its polarization resistance Rp is 2.467 M?·cm2 . After soaking in 3.5 wt.% NaCl solution for 15 d, the epoxy coating still has a good anti-corrosion effect, and its impedance value Z0.01Hz is still 26.89% of that of the first day, showing excellent long-term stability and anti-corrosion performance. Owing to the synergistic effect between SPANI-POSS and BTA, the prepared BTA@SPANI-POSS epoxy coating reacts complexly with the carbon steel substrate during soaking, thus playing a long-term protective role.
Key words:  SPANI  nanoparticle  corrosion inhibitor  epoxy coating  anticorrosion performance
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