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1005634961
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| We have investigated how the effectiveness of a corrosion inhibitor added to an aqueous solution to suppress the corrosion rate of steel is reduced by the addition of sand. The equilibrium adsorption isotherms of the inhibitor with respect to both the steel surface (consisting of iron carbonate under the corrosion conditions used here) and the sand surface have been measured. The results enable the quantitative calculation of how the surface concentration of inhibitor at the steel surface is reduced by sand addition. Combining the adsorption information with measurements of how the steel corrosion rate depends on the inhibitor surface concentration enables the quantitative prediction of the inhibitor effectiveness as a function of sand concentration. Excellent agreement is obtained between calculated and measured values of the inhibitor performance as functions of both inhibitor and sand concentrations. This methodology demonstrates how the optimization of a corrosion inhibitor formulation for specific application conditions should take into account the parasitic adsorption of the inhibitor onto the competitor surfaces present. |
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爱与雨下: 金币+1 2012-11-24 17:26:16
Carena: 金币+10, 翻译EPI+1, 金币代发 2013-01-06 17:31:10
爱与雨下: 金币+1 2012-11-24 17:26:16
Carena: 金币+10, 翻译EPI+1, 金币代发 2013-01-06 17:31:10
| 我们研究了砂子是如何对抑制钢铁腐蚀的抗腐蚀剂水溶液产生不利影响的。测量了关于钢铁表面（在此腐蚀条件下，表面由碳酸铁组成）和砂子表面的抗腐蚀剂的平衡吸附等温线。结果实现了关于表面抗腐蚀剂浓度因砂子的存在而减小的数值计算。 综合吸附信息并测量抗腐蚀剂浓度对钢铁腐蚀速率的影响关系，就能够预测抗腐蚀剂效率关于砂子浓度的函数关系。关于抗腐蚀剂浓度和砂子浓度的抗腐蚀剂效果的函数计算值和测量值之间相互吻合。此方法体系表明了在优化用于特定环境的抗腐蚀剂配方时，应该考虑到抗腐蚀剂在竞争物表面的寄生式吸附。 |
2楼2012-11-24 16:48:25
1005634961 
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3楼2012-11-24 19:48:11