Li Dongyi, Zhang Panpan, Guo Xinyu, Zhao Xiaowei, Xu Ying
College of Chemistry and Chemical Engineering, Henan University Kaifeng 475004 China
School of Pharmacy and Chemical Engineering, Zhengzhou University of Industrial Technology Zhengzhou 451150 China.
RSC Adv. 2019 Dec 11;9(70):40997-41009. doi: 10.1039/c9ra04218k. eCollection 2019 Dec 9.
The inhibitory effect of radish leaf extract (RLE) on mild steel corrosion in 0.5 M HSO was studied by the weight loss method and the electrochemical method. The results demonstrated that the efficiency of inhibition increased with an increase in the concentration of RLE and decreased with an increase in temperature. The inhibition performance reached 93% with 300 mg L at 298 K. RLE behaved as a mixed-type inhibitor based on the cathode. The inhibition mechanism involved the adsorption of the active ingredients of RLE on the mild steel surface to prevent corrosion. The adsorption followed the Langmuir adsorption isotherm, and physical and chemical adsorption coexisted. The results were supported by SEM, quantum chemical calculations, FTIR and UV-visible spectroscopy analyses.
采用失重法和电化学方法研究了萝卜叶提取物（RLE）对0.5 M H₂SO₄中低碳钢腐蚀的抑制作用。结果表明，缓蚀效率随RLE浓度的增加而提高，随温度的升高而降低。在298 K下，300 mg/L的RLE缓蚀性能达到93%。基于阴极，RLE表现为混合型缓蚀剂。缓蚀机理涉及RLE活性成分在低碳钢表面的吸附以防止腐蚀。吸附遵循朗缪尔吸附等温线，物理吸附和化学吸附共存。扫描电子显微镜（SEM）、量子化学计算、傅里叶变换红外光谱（FTIR）和紫外可见光谱分析结果支持了上述结果。
