Effects of 1-pyrrolidinedithiocarbamate and 2,5-dimercapto-1,3,4-thiadiazole on lead corrosion behavior in chloride medium

被引：0
|
作者：
Qafsaoui, W. [1 ]
Taouil, A. Et [2 ]
Tran, T. T. M. [3 ]
Cachet, H. [3 ]
Joiret, S. [3 ]
机构：
[1] Univ Chouaib Doukkali, Fac Sci El Jadida, BP 20, El Jadida 24000, Morocco
[2] Univ Franche Comte, Inst UTINAM, CNRS, UMR 6213, 30 Ave Observ, F-25009 Besancon, France
[3] Sorbonne Univ, CNRS, Lab Interfaces & Syst Electrochim, LISE, F-75005 Paris, France
来源：
JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2023年 / 940卷
关键词：
Organic coatings; Polarization; EIS; Surface characterization; Neutral inhibition; CHEMICAL MECHANISMS; FILM THICKNESS; INHIBITION; WATER; ACID; SURFACE; DISSOLUTION; CHEMISTRY; IMPEDANCE; KINETICS;
D O I：
10.1016/j.jelechem.2023.117501
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
The adsorption and corrosion protection of 1-pyrrolidinedithiocarbamate (PDTC) and 2,5-dimercapto-1,3,4thiadiazole (DMTD) on bare Pb were investigated. Surface analyses revealed that for high concentration (i.e 10 mM), the organic molecules are strongly adsorbed on Pb surface. In 30 g.L-1 NaCl, Pb corrosion current was highly decreased and anodic passivation was very efficient. EIS measurements and simulations enabled to evaluate organic films thickness, anodic charge transfer resistance Rta and metal/film interface resistivity rho 0. Efficient Pb corrosion protection was confirmed. Results obtained from Young and power law models showed that EIS parameters are not much dependent on the chosen analytical expression.
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页数：11
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