Wang Feng, Ge Hong-Hua, Wu Kai, Sha Jun-Yi, Wang Le-Tian, Wan Chuan, Zhao Yu-Zeng, Meng Xin-Jing
Shanghai University of Electric Power, Shanghai Engineering Research Center of Energy-Saving in Heat Exchange Systems, Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power, Shanghai 200090, China.
J Nanosci Nanotechnol. 2018 Dec 1;18(12):8327-8332. doi: 10.1166/jnn.2018.16421.
The influence of Al2O3 nanoparticles on corrosion inhibition of benzotriazole (BTA) in brass/ simulated water system was studied by potentiodynamic polarization curve and electrochemical impedance spectroscopy (EIS). The results show that BTA has good corrosion inhibition effect on brass. Al2O3 nanoparticles could reduce the corrosion inhibition performance of BTA. The higher the concentration of Al2O3 nanoparticles in simulated water, the lower corrosion inhibition performance of BTA. The isothermal adsorption of BTA on brass surface in simulated water and Al2O3 nanofluids was analyzed. The results indicated that the adsorption of BTA on brass surface followed the Langmuirs' adsorption isotherm, the adsorption Gibbs free energy ΔG was less than -40 kJ/mol, corresponding to chemical adsorption, in both simulated water and Al2O3 nanofluids. The -ΔG value of BTA on brass surface decreased in Al2O3 nanofluids, indicating the weakening of the BTA adsorption on the brass surface. Surface analysis of brass samples by optical microscope and X-ray diffraction confirmed the above results.
通过动电位极化曲线和电化学阻抗谱（EIS）研究了Al2O3纳米颗粒对黄铜/模拟水体系中苯并三唑（BTA）缓蚀性能的影响。结果表明，BTA对黄铜具有良好的缓蚀效果。Al2O3纳米颗粒会降低BTA的缓蚀性能。模拟水中Al2O3纳米颗粒的浓度越高，BTA的缓蚀性能越低。分析了BTA在模拟水和Al2O3纳米流体中在黄铜表面的等温吸附情况。结果表明，在模拟水和Al2O3纳米流体中，BTA在黄铜表面的吸附均遵循朗缪尔吸附等温线，吸附吉布斯自由能ΔG小于-40 kJ/mol，对应化学吸附。在Al2O3纳米流体中，BTA在黄铜表面的-ΔG值降低，表明BTA在黄铜表面的吸附减弱。通过光学显微镜和X射线衍射对黄铜样品进行表面分析证实了上述结果。
