The inhibition action of a nonionic surfactant of tween-80 on the corrosion of cold rolled steel (CRS) in sulfuric acid (H_2SO_4) has been investigated by weight loss and potentiodynamic polarization methods. Atomic force microscope (AFM) provided the CRS surface conditions. The results show that tween-80 is a good inhibitor in 1.0 M H_2SO_4, and its adsorption obeys Langmuir adsorption isotherm. Effects of temperature (20-50 ℃) and acid concentration (0.5-7.0 M) on the inhibition action were investigated. Polarization curves show that tween-80 is a mixed-type inhibitor in sulfuric acid, but prominently inhibits the cathodic reaction. The results obtained from weight loss and potentiodynamic polarization are consistent, and the inhibition action could also be evidenced by AFM images.
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机译：通过重量损失和电位动力学极化方法研究了吐温80非离子表面活性剂对冷轧钢（CRS）在硫酸（H_2SO_4）中腐蚀的抑制作用。原子力显微镜（AFM）提供了CRS的表面条件。结果表明，吐温80是1.0 M H_2SO_4的良好抑制剂，其吸附符合Langmuir吸附等温线。研究了温度（20-50℃）和酸浓度（0.5-7.0M）对其抑制作用的影响。极化曲线表明，吐温80是硫酸中的混合型抑制剂，但能显着抑制阴极反应。从减肥和电位动力学极化获得的结果是一致的，并且抑制作用也可以通过AFM图像证明。
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