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首页> 外文期刊>International Journal of Electrochemical Science >Corrosion Inhibition Effect of 5-Azidomethyl-8- Hydroxyquinoline on AISI 321 Stainless Steel in Phosphoric Acid Solution
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Corrosion Inhibition Effect of 5-Azidomethyl-8- Hydroxyquinoline on AISI 321 Stainless Steel in Phosphoric Acid Solution

机译：5-氮杂甲基-8-羟基喹啉对磷酸溶液中AISI 321不锈钢的腐蚀抑制作用

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摘要

In the present paper, 5-Azidomethyl-8-hydroxyquinoline (AMHQ), a synthesized molecule, has been evaluated as a corrosion inhibitor for AISI 321 stainless steel in 5.5 M phosphoric acid solution, using chemical and electrochemical methods such as, hydrogen gas evolution, potentiostatic tests, potentiodynamic polarization, and impedance measurements (EIS). The obtained results show that the inhibition ability is enhanced with increasing concentrations of AMHQ and decreased with temperature. Potentiodynamic polarization curves showed that the AMHQ was acting as a mixed type inhibitor, by adsorption on both anodic and cathodic sites of Alloy 321. EIS measurements revealed that the dissolution of Alloy 321 is controlled by a mechanism of pure activation. The AMHQ is adsorbed on Alloy 321 surface according to the Langmuir isotherm adsorption model and thermodynamic parameters of the adsorption were also determined. Functional density theory (DFT) was used to modelize the interactions between the molecular structure of AMHQ and stainless steel surface.
机译：在本文中，5-氮杂甲基-8-羟基喹啉（AMHQ），合成分子，已被评估为5.5M磷酸溶液中AISI 321不锈钢的腐蚀抑制剂，使用氢气进化等化学和电化学方法，电位性试验，电位动力学极化和阻抗测量（EIS）。得到的结果表明，随着AMHQ浓度的增加并随温度降低而增强了抑制能力。电位动力学偏振曲线表明，通过对合金321的阳极和阴极部位的吸附吸附，AMHQ作为混合型抑制剂。EIS测量显示，合金321的溶解是通过纯活化的机制控制的。根据Langmuir等温吸附模型和吸附的热力学参数，AMHQ吸附在合金321表面上。功能密度理论（DFT）用于塑造AMHQ和不锈钢表面的分子结构之间的相互作用。

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