无患子果皮提取物的纳微米聚集体对钢的高效缓蚀

High efficient corrosion inhibition of steel by nano-micro aggregates of Sapindus mukorossi Gaertn peel extracts

为寻求绿色、可持续与具备大规模应用潜能的天然植物提取物作为缓蚀剂,选择具有表面活性剂性质的无患子果皮提取物作为研究对象。通过简便乙醇回流萃取获得无患子果皮提取物。在室温条件下,无患子果皮提取物在DMF(N,N-二甲基甲酰胺)/HCl水溶液的混合溶液(体积比50/50,1.0 mol/L HCl溶液)中能够发生自组装产生有序的纳微米聚集材料。傅里叶变换红外光谱(FT-IR)与X射线光电子能谱(XPS)研究表明了无患子果皮提取物聚集体能够对Q235钢表面产生化学吸附作用。利用电化学方法研究了无患子果皮提取物聚集体吸附在钢表面后,在1.0 mol/L盐酸水溶液中的缓蚀性能。结果表明无患子果皮提取物聚集体能够有效抑制钢被盐酸腐蚀,最大缓蚀效率达到90%以上。

To seek green,sustainable and natural plant extracts with the potential for large-scale application as corrosion inhibitors,this article selects the extracts of the Sapindus mukorossi Gaertn peels with surfactant properties as the research object.Hence,this article uses Sapindus mukorossi Gaertn peel extracts(SMGPE)with surfactant properties as the study candidate.This survey presents efficient extraction of Sapindus mukorossi Gaertn peels by simply refluxing ethanol solution.It is shown that SMGPE can process orderly nano-micro meters aggregation in DMF/HCl(volume ratio:50/50,1.0 mol/L HCl solution)mixed solution through self-organization at the room temperature.The results show that the predominantly strong chemical adsorption of formed SMGPE aggregates on the studied Q235 steel specimens is suggested through the detection of FT-IR,Raman as well as XPS spectroscopy.This study further determines the corrosion inhibition effect of the stable SMGPE aggregates for the studied steel specimens in 1.0 mol/L HCl aqueous solution based on electrochemical method.The results suggest that the SMGPE aggregates can inhibit corrosion of the steel specimens in HCl solution efficiently,and the greatest corrosion inhibition efficiency is over 90%.