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The effect of some Schiff bases on the corrosion of aluminum in hydrochloric acid solution

机译：某些席夫碱对盐酸溶液中铝腐蚀的影响

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The inhibition effect of Schiff bases benzylidene-(2-methoxy-phenyl)-amine (A), (2-methoxy-phenyl)-(4-methyl-benzylidene)-amine (B), (4-chloro-benzylidene)-(2-methoxy-phenyl)-amine (C) and (4-nitro-bezylidene)-(2-methoxy-phenyl)-amine (D) on the corrosion of aluminum in 1 M HCl has been studied by polarization, electrochemical impedance spectroscopy (EIS) and weight loss measurements. It has been found that all the studied Schiff bases are excellent inhibitors. Maximum inhibition was obtained for 0.01 M Schiff base A. Results show that the inhibition efficiency increases with decreasing in temperature and increasing in concentration of Schiff base. Polarization curves reveal that the used inhibitors are mixed type inhibitors. The surface adsorption of the Schiff bases leads to a decrease of double,layer capacitance as well as an increase of polarization resistance. The inhibitor performance depends strongly on the type of function groups substituted on benzene ring. The adsorption of used compounds on the aluminum surface obeys a Langmuir isotherm and has a physical mechanism. Thermodynamic parameters for both dissolution and adsorption processes were determined. The quantum chemical study of the corrosion inhibition efficiency of the Schiff bases on Al in molar HCl was carried out. (c) 2005 Elsevier B.V. All rights reserved.
机译：席夫碱亚苄基-（2-甲氧基-苯基）-胺（A），（2-甲氧基-苯基）-（4-甲基-亚苄基）-胺（B），（4-氯-亚苄基）-的抑制作用通过极化，电化学阻抗研究了（2-甲氧基-苯基）-胺（C）和（4-硝基-亚苄基）-（2-甲氧基-苯基）-胺（D）对铝在1 M HCl中的腐蚀光谱（EIS）和减肥测量。已经发现所有研究的席夫碱都是优异的抑制剂。对于0.01 M的席夫碱A，获得了最大的抑制作用。结果表明，随着温度的降低和席夫碱浓度的增加，抑制效率增加。极化曲线表明所用抑制剂是混合型抑制剂。席夫碱的表面吸附导致双层电容的减少以及极化电阻的增加。抑制剂的性能在很大程度上取决于在苯环上取代的官能团的类型。用过的化合物在铝表面的吸附遵循朗缪尔等温线并具有物理机制。确定了溶解和吸附过程的热力学参数。进行了Schiff碱对Al的HCl缓蚀作用的量子化学研究。 （c）2005 Elsevier B.V.保留所有权利。

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