用极化曲线和交流阻抗技术测定了钢在含不同浓度甲基红的 1.0 mol/ L HCl和 0 .5 m ol/ L H2 SO4+0 .5 mol/ L Na2 SO4溶液中的腐蚀速率和传递电阻 ,求出了缓蚀效率。结果表明 ,甲基红无论是在 HCl溶液中或是在0 .5 mol/ L H2 SO4+0 .5 ...用极化曲线和交流阻抗技术测定了钢在含不同浓度甲基红的 1.0 mol/ L HCl和 0 .5 m ol/ L H2 SO4+0 .5 mol/ L Na2 SO4溶液中的腐蚀速率和传递电阻 ,求出了缓蚀效率。结果表明 ,甲基红无论是在 HCl溶液中或是在0 .5 mol/ L H2 SO4+0 .5 mol/ L Na2展开更多
The corrosion rate and interface capacity of steel in 0.5mol/L H 2SO 4+0 5mol/L Na 2SO 4 solution containing methyl red were measured by curve-fitting method of polarization data and Ac impedance technique at 20℃.The...The corrosion rate and interface capacity of steel in 0.5mol/L H 2SO 4+0 5mol/L Na 2SO 4 solution containing methyl red were measured by curve-fitting method of polarization data and Ac impedance technique at 20℃.The degree of coverage of methyl red on steel surface was calculated.The degree of coverage was found to increase with the increasing of concentration of methyl red.The experimental data were treated with adsorption kinetic theory,too.It was found that adsorption of methyl red on steel surface in the acidic solutions was a substitution adsorption process and one water molecule was displaced by each adsorbed methyl molecule.The experimental result shows that at 20℃ the adsorption behavior follows the isotherm θ/ =1/55.5exp[27808-972 θ)/RT ].The ideal surface adsorption free energy was calculated.The interface capacity of steel decreases with the increasing of the degree of surface coverage in acidic solutions at 20℃.展开更多
基金The project was supported by the National Natural Science Foundation of China(20903028)Scientific Research Foundation for Returned Scholars from Ministry of Education of China,and Scientific Research Foundation for Yangcheng Scholar,China(10A041G)~~
文摘用极化曲线和交流阻抗技术测定了钢在含不同浓度甲基红的 1.0 mol/ L HCl和 0 .5 m ol/ L H2 SO4+0 .5 mol/ L Na2 SO4溶液中的腐蚀速率和传递电阻 ,求出了缓蚀效率。结果表明 ,甲基红无论是在 HCl溶液中或是在0 .5 mol/ L H2 SO4+0 .5 mol/ L Na2
文摘The corrosion rate and interface capacity of steel in 0.5mol/L H 2SO 4+0 5mol/L Na 2SO 4 solution containing methyl red were measured by curve-fitting method of polarization data and Ac impedance technique at 20℃.The degree of coverage of methyl red on steel surface was calculated.The degree of coverage was found to increase with the increasing of concentration of methyl red.The experimental data were treated with adsorption kinetic theory,too.It was found that adsorption of methyl red on steel surface in the acidic solutions was a substitution adsorption process and one water molecule was displaced by each adsorbed methyl molecule.The experimental result shows that at 20℃ the adsorption behavior follows the isotherm θ/ =1/55.5exp[27808-972 θ)/RT ].The ideal surface adsorption free energy was calculated.The interface capacity of steel decreases with the increasing of the degree of surface coverage in acidic solutions at 20℃.
