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Thiocarbohydrazide-crosslinked chitosan as a bioinspired corrosion inhibitor for protection of stainless steel in 3.5% NaCl
Sustainable Chemistry and Pharmacy ( IF 5.5 ) Pub Date : 2020-01-20 , DOI: 10.1016/j.scp.2020.100213
Khadija EL. Mouaden , D.S. Chauhan , M.A. Quraishi , Lahcen Bazzi

A facile single-step synthesis was performed to cross-link chitosan with thiocarbohydrazide to yield thiocarbohydrazide-chitosan (TC-Cht) which was for the first time evaluated as an inhibitor for corrosion of stainless steel in 3.5% NaCl solution. A comprehensive electrochemical analysis employing electrochemical impedance spectroscopy (EIS), potentiodynamic polarization (PDP), and cyclic voltammetry (CV) was undertaken and showed that the TC-Cht acts by adsorption on the steel surface and exhibits mixed type behavior with predominantly cathodic nature. The adsorption of TC-Cht molecules on the surface of stainless steel followed the Langmuir isotherm. The TC-Cht showed a high inhibition efficiency of >94% at 500 mg L−1 concentration. Surface investigation using SEM and EDX supported the inhibitor adsorption on the steel surface.



中文翻译:

硫代碳酰肼交联的壳聚糖作为生物启发的缓蚀剂,用于在3.5%NaCl中保护不锈钢

进行了简便的单步合成,将壳聚糖与硫代碳酰肼交联,生成了硫代碳酰肼-壳聚糖(TC-Cht),该化合物首次被评估为在3.5%NaCl溶液中腐蚀不锈钢的抑制剂。进行了使用电化学阻抗谱(EIS),电势极化(PDP)和循环伏安法(CV)的全面电化学分析,结果表明TC-Cht通过吸附在钢表面上起作用,并表现出主要是阴极性质的混合型行为。TC-Cht分子在不锈钢表面的吸附遵循Langmuir等温线。TC-Cht在500 mg L -1时显示出大于94%的高抑制效率浓度。使用SEM和EDX进行的表面研究支持抑制剂在钢表面的吸附。

更新日期:2020-01-20
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