环保型复合缓蚀剂的制备与性能

为了解决碳钢在含有NaCl溶液中的腐蚀问题，在硅酸钠溶液中复配其他缓蚀组分，制备环保型复合缓蚀剂，通过Tafel极化曲线，盐水浸泡实验，扫描电子显微镜（SEM）对缓蚀剂的性能进行表征．实验结果表明：在室温条件下含缓蚀剂的NaCl水溶液（质量分数5％）对碳钢的腐蚀速率明显降低，缓蚀率达到85．58％，SEM分析显示碳钢表面形成了一层致密的钝化膜；随着腐蚀体系的温度、搅拌速度升高以及碳钢浸泡时间的延长，缓蚀效率不断下降．

Preparation and Properties of Environmental Compound Inhibitor

In order to resist the corrosion of carbon steel in NaC1 solution, the environmental inhibitor was prepared by add- ing other inhibitors in sodium silicate solution. The performance evaluation of inhibitor was characterized by Tafel polariza- tion curves, salt water immersion tests and scanning electron microscope. The experiment results show that 5% NaC1 solution containing inhibitor can decrease the corrosion rate of carbon steel apparently under the condition of indoor temperature. The inhibition efficiency is 85.58%, and the photographs of SEM show that a uniform and compact passive film was formed on the surface of carbon steel, with the increase of temperature, stirring speed in corrosion system and the extension of time for carbon steel immersion in corrosion system, the efficiency of inhibitor gradually decrease.