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Studies on adsorption and corrosion inhibitive properties of quinoline derivatives on N80 steel in 15% hydrochloric acid

机译:N80钢在15%盐酸中喹啉衍生物的吸附与缓蚀性能研究。

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This paper deals with the N80 steel corrosion protection study in 15% HCl which was carried by three quinoline derivatives namely 3-acetyl-1-(4-methylbenzylideneamino) quinolin-2-one (AQ-1), 3-acetyl-1-(4 hydroxy benzylideneamino) quinolin-2-one (AQ-2), 3-acetyl-1-(3-nitrobenzylideneamino) quinolin-2(1H)-one (AQ-3) using gravimetric, electrochemical, and quantum chemical studies. Tafel polarization showed that AQs are mixed type inhibitors but dominantly affect cathodic reaction more. The observed results reveal that AQ-1 is the best inhibitor. All the three inhibitors were found to obey the Langmuir adsorption isotherm. Scanning electron microscopy (SEM) micrographs supports the protection of the N80 steel by AQs. Quantum chemical study reveals that the inhibitors have a tendency to get protonated and this protonated form has greater tendency to get adsorbed onto the N80 steel surface.
机译:本文研究了N80钢在15%HCl中的腐蚀防护研究,该研究由三种喹啉衍生物即3-乙酰基-1-(4-甲基苄叉基氨基)喹啉-2-酮(AQ-1),3-乙酰基-1- (4羟基苄叉基氨基)喹啉-2-酮(AQ-2),3-乙酰基-1-(3-硝基苄叉基氨基)喹啉-2(1H)-酮(AQ-3)使用重量,电化学和量子化学研究方法。 Tafel极化表明AQ是混合型抑制剂,但对阴极反应的影响更大。观察结果表明,AQ-1是最好的抑制剂。发现所有这三种抑制剂均符合Langmuir吸附等温线。扫描电子显微镜(SEM)显微照片支持AQ对N80钢的保护。量子化学研究表明,抑制剂具有质子化的趋势,并且该质子化形式具有更易于吸附在N80钢表面的趋势。

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