Kinetics of Corrosion Inhibition of Aluminum in Acidic Media by Water-Soluble Natural Polymeric Pectates as Anionic Polyelectrolyte Inhibitors

Materials

Refat M. Hassan¹ 

[1] Chemistry Department, Faculty of Science, Assiut University, Assiut 71516, Egypt

关键词: corrosion;    inhibitors;    aluminum;    pectates;    kinetics;    mechanisms;   

DOI  :  10.3390/ma6062436

来源: mdpi

【 摘 要 】

Corrosion inhibition of aluminum (Al) in hydrochloric acid by anionic polyeletrolyte pectates (PEC) as a water-soluble natural polymer polysaccharide has been studied using both gasometric and weight loss techniques. The results drawn from these two techniques are comparable and exhibit negligible differences. The inhibition efficiency was found to increase with increasing inhibitor concentration and decrease with increasing temperature. The inhibition action of PEC on Al metal surface was found to obey the Freundlich isotherm. Factors such as the concentration and geometrical structure of the inhibitor, concentration of the corrosive medium, and temperature affecting the corrosion rates were examined. The kinetic parameters were evaluated and a suitable corrosion mechanism consistent with the kinetic results is discussed in the paper.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.