Department of Chemistry, Periyar University, Salem 636011, Tamil Nadu, India.
Carbohydr Polym. 2013 Jun 5;95(1):288-94. doi: 10.1016/j.carbpol.2013.02.069. Epub 2013 Mar 7.
Glucose, gellan gum, and hydroxypropyl cellulose were studied against the acid corrosion of cast iron by means of weight loss, potentiodynamic polarization, and AC impedance spectroscopy techniques. The inhibition efficiency was found to increase with increasing concentration of the inhibitors. The effect of immersion time and temperature were also studied. The addition of potassium iodide to the corrosion-inhibition system showed both antagonism and synergism toward inhibition efficiency. Polarization studies revealed the mixed-type inhibiting nature of the carbohydrates. The adsorption of inhibitors on the cast iron surface obeys Langmuir adsorption isotherm model, both in presence and absence of KI. Physical interaction between the inhibitor molecules and the iron surface was suggested by the thermochemical parameters, rather than chemical interaction.
葡萄糖、结冷胶和羟丙基纤维素通过失重法、动电位极化和交流阻抗谱技术研究了对抗铸铁酸腐蚀的作用。发现随着抑制剂浓度的增加，抑制效率增加。还研究了浸泡时间和温度的影响。向腐蚀抑制体系中添加碘化钾对抑制效率表现出拮抗和协同作用。极化研究表明碳水化合物具有混合型抑制特性。抑制剂在铸铁表面的吸附遵循 Langmuir 吸附等温线模型，无论是在有 KI 还是没有 KI 的情况下。通过热化学参数表明，抑制剂分子与铁表面之间的相互作用是物理相互作用，而不是化学相互作用。
