Corrosion and scale processes and their inhibition in simulated cooling water systems by monosaccharides derivatives: Part I: EIS study

详细信息    查看全文

• 作者：R. Touir ; N. Dkhireche ; M. Ebn Touhami ; M. Lakhrissi ; B. Lakhrissi ; M. Sfaira
• 关键词：Corrosion and scale ; Simulated cooling water ; EIS ; Inhibition ; Monosaccharide
• 刊名：Desalination
• 出版年：2009
• 出版时间：25 December 2009
• 年：2009
• 卷：249
• 期：3
• 页码：922-928
• 全文大小：769 K

文摘

A study of the ordinary mild steel/cooling water interface, with and without inhibitor, was carried out using electrochemical impedance spectroscopy (EIS). EIS spectra in uninhibited medium reveal that a layer of corrosion and scale products is formed naturally and evolves with the immersion time. Monosaccharides derivatives were used as corrosion inhibitors. Most of them exhibit good behaviour against corrosion of ordinary steel in simulated water systems. Their inhibiting efficiency increases with concentration rise and depends on molecular structure especially –OH groups' position on two adjacent carbons and their number. In addition, the effect of MoO₄²⁻ on the corrosion inhibition in the presence of the best inhibitor was also studied by EIS. The addition of MoO₄²⁻ enhanced the inhibition efficiency.