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本文简要描述三点法测定东工—855洗涤液缓蚀效率的原理和实验。应用平衡电位附近(过电位的绝对值在20～70mv 之间)的一些极化数据,可以求得铸铁和纯铁在含缓蚀剂与不含缓蚀剂的2.28N HCl 溶液中腐蚀电流密度,从而能算出缓蚀效率。本法快速简便,所得结果与失重法的结果比较接近。
This article briefly describes the principle and experiment of three-point method to determine the corrosion inhibition efficiency of Donggong-855 detergent. Applying some polarization data near the equilibrium potential (absolute value of overpotential between 20 ~ 70mv), we can get the corrosion current density of cast iron and pure iron in 2.28N HCl solution with and without corrosion inhibitor , Which can calculate the inhibition efficiency. This method is quick and easy, and the result obtained is close to the result of weightlessness method.