A novel acid-responsive HNTs-based corrosion inhibitor for protection of carbon steel

作者：Xing, Xuteng; Wang, Jihui^*; Li, Qiushi; Hu, Wenbin; Yuan, Jing

来源：Colloids and Surfaces A: Physicochemical and Engineering Aspects , 2018, 553: 295-304.

DOI：10.1016/j.colsurfa.2018.05.072

• HNTs
• Corrosion inhibitor
• Control release
• Inhibition efficiency

In this work, a novel Cu-BTA-Na2MoO4-HNTs corrosion inhibitor was reported by loading Na2MoO4 and benzotriazole (BTA) into halloysite nanotubes (HNTs), followed by incorporated insoluble Cu-BTA complex stoppers M the end of tubes through the interaction between BTA and Cu2+. For Cu-BTA-Na2MoO4-HNTs, BTA can not only participate in the stoppers preparation of Cu-BTA complex extending the release time of Na2MoO4, but also act as another corrosion inhibitor similar with Na2MoO4. Very importantly, the obtained Cu-BTA-Na2MoO4 HNTs is also responsive to acid medium, owing to the decomposition of the insoluble Cu-BTA complex in acid solution. In addition, the Q235 steel in 3.5% NaCl + 1.0 g/L Cu-BTA-Na2MoO4-HNTs shows higher inhibition efficiency than Q235 steel in 3.5% NaCl, such as the inhibition efficiency can be improved to 60.39% M 48 h by the synergistic effect between Na2MoO4 and BTA. Therefore, Cu-BTA-Na2MoO4-HNTs is a promising efficient and acid-response corrosion inhibitor for carbon steel.

• 出版日期2018-9-20
• 单位水利工程仿真与安全国家重点实验室; 天津大学