首页> 外文期刊>International Journal of Electrochemical Science >WL, I-E and EIS Studies on the Corrosion Behaviour of Mild Steel by 7-substituted 3-methylquinoxalin-2(1H)-ones and thiones in Hydrochloric Acid Medium
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WL, I-E and EIS Studies on the Corrosion Behaviour of Mild Steel by 7-substituted 3-methylquinoxalin-2(1H)-ones and thiones in Hydrochloric Acid Medium

机译:WL,I-E和EIS研究了7-取代的3-甲基喹喔啉-2(1H) - 盐酸培养基中的温和钢的腐蚀行为

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The present study examines the use of some 7-R-3-methylquinoxalin-2(1H)-ones and thiones, namely3-methylquinoxalin-2(1H)-one (Q=O), 3-methylquinoxalin-2(1H)-thione (Q=S), 7-chloro-3- methylquinoxalin-2(1H)-one (Cl-Q=O) and 7-chloro-3-methylquinoxalin-2(1H)-thione (Cl-Q=S) forcorrosion and dissolution protection of mild steel in 1 M HCl. The inhibiting efficiency of the differentinhibitors under study is evaluated by means of weight loss and electrochemical techniques(potentiodynamic curves and impedance measurements). The experimental results reveal that Q=S >Cl-Q=S > Q=O > Cl-Q=O. The variation in inhibiting efficiency mainly depends on the type andnature of the chlorine group and the substitution of an atom of oxygen by a sulphur atom. Polarizationcurves exhibit that these quinoxaline derivatives are predominately cathodic type inhibitors and mixed- type in the case of Q=S in molar hydrochloric acid. The inhibiting efficiency increases with the-3 quinoxaline derivatives and reaches the maximum value of ca. 90 % in the case of Q=S at 10 M. Theresults obtained from weight loss and electrochemical studies are in reasonable good agreement andfollow the same trend. The adsorption of quinoxaline derivatives on the mild steel obeys to theLangmuir isotherm model.
机译:本研究检查了一些7-R-3-甲基喹喔啉-2(1H) - 酮和酮,Nameely3-甲基喹喔啉-2(1H) - ON(Q = O),3-甲基喹喔啉-2(1H) - Thione(Q = S),7-氯-3-甲基喹喔啉-2(1H) - 酮(Cl-Q = O)和7-氯-3-甲基喹喔啉-2(1H) - 硫酮(CL-Q = S) 1M HCl中温和钢的抗腐蚀性和溶出保护。通过重量损失和电化学技术(电位曲线和阻抗测量)评估DIMICAL的抑制效率(电位曲线和阻抗测量)。实验结果表明Q = S> CL-Q = S> Q = O> CL-Q = O.抑制效率的变化主要取决于氯基团的型Andnature,并通过硫原子取代氧原子。极化细胞表明,这些喹喔啉衍生物主要是阴极型抑制剂和混合型在摩尔盐酸中的Q = S的情况下。抑制效率随-3喹喔啉衍生物增加,达到CA的最大值。 90%的Q = S在10米的Q = S的情况下。从体重减轻和电化学研究中获得的结果是合理的良好协议,并遵循相同的趋势。喹喔啉衍生物对低碳钢犬对龙岗MUIR等温模型的吸附。

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