用硫代甲酰二肼与聚琥珀酰亚胺合成了新型改性聚天冬氨酸(PASP/CD).其次,使用红外光谱(FT-IR)和核磁共振氢谱(NMR)对PASP/CD进行了结构表征.最后,采用质量法、电化学法、原子力显微镜(AFM)、接触角和扫描电镜及能谱研究了 P ASP/CD在0.5 mol/L盐酸溶液中对碳钢的缓蚀行为.结果表明,PASP/CD作为混合型缓蚀剂,在盐酸溶液中加入PASP/CD后,体系的电荷转移电阻显著增加.PASP/CD的浓度为80 mg/L时缓蚀效率最高,达到91.48％,远高于PASP;与PASP相比,PASP/CD的缓蚀性能受温度的影响较小.AFM图和粗糙度数据可知PASP/CD具有良好的腐蚀抑制性能.发现PASP/CD的缓蚀作用是由于其侧链上的新官能团在钢表面的物理和化学吸附作用成膜的结果.研究为拓宽绿色水处理剂聚天冬氨酸的综合性能提供技术支持.
Study on corrosion inhibition of carbon steel by a new type of corrosion inhibitor
A novel modified polyaspartic acid(PASP/CD)was synthesized from thiocarbazide and polysuccinim-ide.Secondly,the structure of PASP/CD was characterized by infrared spectroscopy(FTIR)and hydrogen nu-clear magnetic resonance spectroscopy(NMR).Finally,the corrosion inhibition behavior of PASP/CD on car-bon steel was studied by gravimetry,electrochemical method,atomic force microscope(AFM),contact angle and scanning electron microscope and energy spectrum(SEM/EDS)in 0.5 mol/L hydrochloric acid solution.The results show that when PASP/CD is added into hydrochloric acid solution as a mixed corrosion inhibitor,the charge transfer resistance of the system increases significantly.When the concentration of PASP/CD is 80 mg/L,the corrosion inhibition efficiency reaches 91.48％,which is much higher than PASP.Compared with PASP,the corrosion inhibition performance of PASP/CD is less affected by temperature.The figures and roughness data of AFM show that PASP/CD has good corrosion inhibition performance.It is found that the in-hibition effect of PASP/CD is due to the physical and chemical adsorption of new functional groups on the steel surface.This work provides technical support for broadening the comprehensive properties of green water treat-ment agent polyaspartic acid.
万方数据
维普
