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

IF 1.5 Q4 ELECTROCHEMISTRY International Journal of Corrosion Pub Date : 2019-01-10 DOI:10.1155/2019/9020489

Mohammad Asadikiya, Y. Zhong, M. Ghorbani

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引用次数: 13

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.

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3303铝合金在水-乙二醇混合物中的腐蚀研究:缓蚀剂和热冲击的影响

评价了由二磷酸钠（Na2H2P2O7）、苯甲酸钠（NaC7H5O2）和四硼酸钠（Na2B4O7）组成的三种缓蚀剂对铝合金3303（UNS A93303）在水-乙二醇（C2H6O2）混合物中的缓蚀效果。进行了电位动力学极化试验，以研究每种化学物质的影响。溶液温度为88°C，铝样品与其他五种金属结合，包括软钢、不锈钢、黄铜、铜和焊料，以包括电偶腐蚀的影响。结果表明，与其他两种化学物质相比，二磷酸钠能有效地保护3303铝合金。研究了热冲击对水-乙二醇溶液腐蚀性的影响。结果表明，乙二醇水溶液的腐蚀性是由于热冲击氧化乙二醇水而增加的。3303铝合金与五种金属在热冲击水乙二醇溶液中的腐蚀速率为142 mpy，而它是94 mpy在淡水乙二醇溶液中。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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