Center of Research Excellence in Corrosion, Research Institute, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia.
Applied Chemistry-Physics Team, Faculty of Sciences, Ibn Zohr University, B.P.8106 Cité Dakhla, Agadir, Morocco.
Int J Biol Macromol. 2020 Jun 1;152:234-241. doi: 10.1016/j.ijbiomac.2020.02.283. Epub 2020 Feb 25.
Chitosan was chemically functionalized using aminotriazolethiol in a facile single-step synthesis. The macromolecule was evaluated as an inhibitor for corrosion of stainless steel in 3.5% NaCl solution. A detailed electrochemical investigation employing electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PDP) was performed, which showed that the inhibitor acts by adsorption on the steel surface and shows a mixed type behavior with the prevalence of cathodic behavior. The new inhibitor aminotriazolethiol-modified chitosan (ATT-Cht) exhibited excellent water solubility and behaved as an efficient inhibitor against corrosion of stainless steel in 3.5% NaCl showing a corrosion inhibition efficiency of 97.8% at a concentration as low as 100 mg L. The results of surface studies using scanning electron microscopy along with energy dispersive X-ray spectroscopy supported the adsorption of the inhibitor on the steel surface.
壳聚糖通过氨基三唑硫醇在简单的一步合成中进行化学功能化。该大分子作为不锈钢在 3.5%NaCl 溶液中腐蚀的抑制剂进行了评估。采用电化学阻抗谱(EIS)和动电位极化(PDP)进行了详细的电化学研究，结果表明抑制剂通过在钢表面吸附起作用，并表现出混合行为，阴极行为占主导地位。新型抑制剂氨基三唑硫醇修饰壳聚糖（ATT-Cht）具有优异的水溶性，在 3.5%NaCl 中对不锈钢的腐蚀表现出高效的抑制作用，在低至 100mg/L 的浓度下，腐蚀抑制效率达到 97.8%。使用扫描电子显微镜和能谱仪进行表面研究的结果支持抑制剂在钢表面的吸附。
