National Engineering Research Center of Light Alloy Net Forming, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China.
School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China.
Sci Rep. 2022 May 5;12(1):7367. doi: 10.1038/s41598-022-10900-x.
Zingiber officinale Roscoe extract, Raphanus sativus L. extract, Rheum palmatum extract, Coptis chinensis extract, Glycyrrhiza uralensis extract (GUE), Potentilla discolor extract (PDE) and Taraxacum officinale extract (TOE) were screened for the green corrosion inhibitors of AZ91 alloy in saline environment. The experiment results demonstrated that GUE, PDE and TOE can significantly enhance the corrosion resistance of AZ91 alloy by 73.4, 87.6 and 84.6%, respectively. Surface characterization using FTIR, UV-Vis and XPS revealed that the organic compounds of GUE, PDE and TOE can interact with the alloy surface to form a protective physisorbed film, effectively mitigating the corrosion process of AZ91 alloy. The present results may be helpful to discover the new green inhibitors with high inhibition efficiency for AZ91 alloy.
生姜提取物、萝卜提取物、大黄提取物、黄连提取物、甘草提取物（GUE）、翻白草提取物（PDE）和蒲公英提取物（TOE）被筛选为 AZ91 合金在盐环境中的绿色缓蚀剂。实验结果表明，GUE、PDE 和 TOE 分别可使 AZ91 合金的耐腐蚀性提高 73.4%、87.6%和 84.6%。利用傅里叶变换红外光谱（FTIR）、紫外可见光谱（UV-Vis）和 X 射线光电子能谱（XPS）进行表面特性分析表明，GUE、PDE 和 TOE 的有机化合物可以与合金表面相互作用，形成物理吸附膜，有效减缓 AZ91 合金的腐蚀过程。本研究结果可能有助于发现具有高抑制效率的新型绿色 AZ91 合金缓蚀剂。
