New anti-corrosion inhibitor (3ar,6ar)-3a,6a-di-p-tolyltetrahydroimidazo[4,5-d]imidazole-2,5(1 h,3h)-dithione for carbon steel in 1 M HCl medium: gravimetric, electrochemical, surface and quantum chemical analyses

Arabian Journal of Chemistry

Abduvali Kholikov¹  Morteza Hosseini²  Guobao Xu³  Khamdam Akbarov³  Elyor Berdimurodov⁴  Aboubakr M. Abdullah⁵ 

[1] Corresponding author at: Karshi State University, Department of Natural Science, Kashkadaryo Region, Karshi City, kuchabog 17, 180100, Uzbekistan.;University of Science and Technology of China, Hefei, China;Faculty of Chemistry, National University of Uzbekistan, Tashkent 100034, Uzbekistan;Faculty of Natural Sciences, Karshi State University, Karshi 180100, Uzbekistan;State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China;

关键词: Corrosion;    Carbon steel;    Acid corrosion;    Acid inhibition;    Electrochemical calculation;   

DOI  :  

来源: DOAJ

【 摘 要 】

The inhibition of (3ar,6ar)-3a,6a-di-p-tolyltetrahydroimidazo[4,5-d]imidazole-2,5(1 h,3h)-dithione (TTHIIDT) for carbon steel was full characterized in a 1 M hydrochloride acid environment at various inhibitor concentrations and temperatures by the gravimetric, electrochemical, surface and quantum chemical analyses. The obtained results confirmed that the inhibition efficiency of TTHIIDT was over 95–97% and nearly stable in the rise of temperature and concentration; TTHIIDT was mixed type inhibitor and effectively influenced both anodic and cathodic corrosion reactions; a protective hydrophobic thin layer of this inhibitor on the carbon steel surface is more stable and non soluble in 1 M HCl medium; this inhibitor adsorbed endothermically on the carbon steel surface by the chemical and physical adsorption processes. The quantum chemical calculations supported the experimental results and showed that the inhibition efficiency is depends on the structure of inhibitor.

【 授权许可】

Unknown