The inhibitive action of azure A (AA) against the corrosion of mild steel (MS) in 0.5 M H2SO4 soln. was studied by gravimetric and electrochem. techniques. The inhibition efficiency increased with increase in concn. of AA. The adsorption of AA on mild steel surface obeys Langmuir adsorption isotherm. Polarization measurements showed that the studied inhibitor is mixed type with significant redn. of cathodic and anodic current densities. Electrochem. impedance spectroscopy measurements revealed that the charge transfer resistance increases with increase in the concn. of AA. Various thermodn. and adsorption parameters were evaluated and discussed. The inhibition efficiency of AA synergistically increased by the addn. of KI. The relation between inhibition efficiency and mol. structure of AA is discussed by considering quantum chem. parameters. [on SciFinder(R)]
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机译：天青A（AA）在0.5 M H2SO4溶液中对低碳钢（MS）腐蚀的抑制作用。用重量法和电化学法研究。技术。抑制效率随浓度的增加而增加。 AA。低碳钢表面上AA的吸附遵循Langmuir吸附等温线。极化测量结果表明，所研究的抑制剂为混合型，具有明显的红色。阴极和阳极电流密度。电化学。阻抗谱测量显示电荷转移电阻随浓度的增加而增加。 AA。各种thermodn。对吸附参数进行了评估和讨论。 Addn协同提高了AA的抑制效率。 KI。抑制效率与摩尔比的关系。通过考虑量子化学讨论了AA的结构。参数。 [在SciFinder（R）上]
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