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

Chemistry Department, Faculty of Science, Assiut University, Assiut 71516, Egypt
Chemistry Department, Faculty of Applied Sciences, Umm Al-Qura University, Makkah Al-Mukarramah 13401, Saudi Arabia Kingdom
Author to whom correspondence should be addressed.
Materials 2013, 6(6), 2436-2451;
Received: 2 April 2013 / Revised: 24 May 2013 / Accepted: 29 May 2013 / Published: 17 June 2013
(This article belongs to the Special Issue Corrosion Monitoring and Control)
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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. View Full-Text
Keywords: corrosion; inhibitors; aluminum; pectates; kinetics; mechanisms corrosion; inhibitors; aluminum; pectates; kinetics; mechanisms

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Hassan, R.M.; Zaafarany, I.A. Kinetics of Corrosion Inhibition of Aluminum in Acidic Media by Water-Soluble Natural Polymeric Pectates as Anionic Polyelectrolyte Inhibitors. Materials 2013, 6, 2436-2451.

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