期刊名称：Journal of Materials and Environmental Science
印刷版ISSN：2028-2508
出版年度：2016
卷号：7
期号：7
页码：2513-2525
出版社：University of Mohammed Premier Oujda
摘要：This work based on the study of corrosion, scale-forming and microorganism inhibition of copper in Moroccan cooling water system by Sodium gluconate (SG), Cetyltrimethyl ammonium bromide (CTAB) and their mixture using electrochemical measurements coupled to scanning electron microscopy (SEM). It is found that the SG inhibits cathodic reactions indicating that it is acted as a cathodic type inhibitor and its inhibition is about 95 % at 10 -3 M. In addition, the results showed that the CTAB acts as a mixed-type inhibitor and the best inhibition is at 15 ppm. So, the synergistic effect between SG and CTAB was investigated. It is showed that the CTAB addition decreased the performance of the SG from 95 % to 88 % and the performance of the mixture increase with immersion time. However, the polarization curves showed that this mixture acts as mixed-type inhibitor. The potential of zero charge (PZC) of copper was determined by AC impedance, and the mechanism of adsorption was discussed. Finally, the SEM observations confirmed that the mixture was a corrosion, scale and microorganism inhibitor after one day of immersion.
关键词：Corrosion inhibition; scaling and microorganism; Copper; cooling water systems; Formulation; SEM
