Extract of Silybum marianum (L.) Gaertn Leaves as a Novel Green Corrosion Inhibitor for Carbon Steel in Acidic Solution

被引:1
|
作者
Wang, Yubin [1 ,2 ]
Li, Lingjie [2 ]
He, Jinbei [3 ]
Sun, Baojiang [1 ]
机构
[1] China Univ Petr East China, Sch Petr Engn, Qingdao 266580, Peoples R China
[2] CNPC Engn Technol Res Co Ltd, Tianjin 300451, Peoples R China
[3] Hubei Jingyu Mat Co Ltd, Wuhan 430073, Peoples R China
关键词
corrosion; corrosion inhibitor; Silybum marianum (L.) Gaertn; adsorption; PERFORMANCE; GRAPHENE; IRON; XPS;
D O I
10.3390/ma17194794
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
In this work, leaves of Silybum marianum (L.) Gaertn were extracted by a one-step extraction method using ethanol as a solvent, and the Silybum marianum (L.) Gaertn extract (SMGE) was firstly employed as a green corrosion inhibitor for carbon steel in 0.5 mol/L H2SO4. The corrosion inhibition performance was studied using weight loss and electrochemical methods, and the anti-corrosion mechanism of SMGE is further analyzed through some surface characterizations and theoretical calculations. The results indicate that SMGE can act as a mixed-type corrosion inhibitor and possess superior corrosion inhibition performance for carbon steel in H2SO4 solution, and the optimum corrosion inhibition efficiency reached 93.06% at 800 ppm SMGE combined with 60 ppm KI. The corrosion inhibition efficiency increased with the rising inhibitor concentration. Surface characterizations illustrated that the inhibitor could physico-chemically adsorb on a metal surface, forming a hydrophobic, protective film.
引用
收藏
页数:12
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