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International Journal of Corrosion
Volume 2019, Article ID 9020489, 6 pages
https://doi.org/10.1155/2019/9020489
Research Article

Corrosion Study of Aluminum Alloy 3303 in Water-Ethylene Glycol Mixture: Effect of Inhibitors and Thermal Shocking

1Department of Mechanical and Materials Engineering, Florida International University, Miami, Florida 33174, USA
2Center for the Study of Matter at Extreme Conditions (CeSMEC), Florida International University, Miami, Florida 33199, USA
3Department of Materials Science and Engineering, Sharif University of Technology, Tehran, Iran

Correspondence should be addressed to Mohammad Asadikiya; ude.uif@500dasam

Received 3 April 2018; Revised 4 December 2018; Accepted 20 December 2018; Published 10 January 2019

Academic Editor: Flavio Deflorian

Copyright © 2019 Mohammad Asadikiya et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Three types of corrosion inhibitors consisting of sodium diphosphate (Na2H2P2O7), sodium benzoate (NaC7H5O2), and sodium tetraborate (Na2B4O7) were evaluated to analyze their effectiveness to inhibit the aluminum alloy 3303 (UNS A93303) against corrosion, in water-ethylene glycol (C2H6O2) mixture. Potentiodynamic polarization tests were carried out to study the effect of each chemical. The temperature of solutions was 88°C and the aluminum samples were coupled with five other metals consisting of mild steel, stainless steel, brass, copper, and solder to include the effect of galvanic corrosion. The results showed that sodium diphosphate can effectively protect the aluminum alloy 3303 in comparison with two other chemicals. The effect of thermal shocking on the corrosivity of water-ethylene glycol solution was also investigated. It was indicated that the corrosivity of water-ethylene glycol solution increases because of thermal shocking, which oxidizes the aqueous ethylene glycol. The corrosion rate of aluminum alloy 3303 coupled with the five metals in thermal shocked water-ethylene glycol solution is 142 mpy, while it is 94 mpy in fresh water-ethylene glycol solution.