Effects of Surfactants on the Corrosion Behavior of Aluminum Alloy in Graphene Nanofluid

Solid State Phenomena Pub Date : 2024-02-15 DOI:10.4028/p-7hmnpl

A. Borode, Noor A. Ahmed, P. Olubambi

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Abstract

In this study, the corrosion behavior of aluminum alloy was investigated in graphene nanoplatelet (GNP) nanofluids prepared with different surfactants. The surfactants include sodium dodecylbenzene sulfonate (SDBS), sodium dodecyl sulfate (SDS), Tween 80, and Gum Arabic (GA). The corrosion properties of the alloy in the different GNP nanofluids were evaluated using potentiodynamic polarization tests at room temperature. The surface morphology of the aluminum alloy was analyzed using a scanning electron microscope coupled with an electron dispersive spectroscopy detector. The experimental results revealed that the addition of surfactants improves the resistance of the aluminum alloy to corrosion in the nanofluid. This was attributed to the adsorption of surfactants on the surface of the alloy to form a protective film layer, which reduces moisture permeability and enhances corrosion inhibition. The addition of GA was found to exhibit the highest inhibition efficiency. This was followed by Tween 80, SDS, and SDBS, which contributes the least inhibition. XRD post-corrosion analysis also reveals the presence of aluminum oxide and aluminum hydroxide phases on the surface of electrodes immersed in all the different GNP nanofluids.

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表面活性剂对石墨烯纳米流体中铝合金腐蚀行为的影响

本研究调查了铝合金在使用不同表面活性剂制备的石墨烯纳米板（GNP）纳米流体中的腐蚀行为。表面活性剂包括十二烷基苯磺酸钠（SDBS）、十二烷基硫酸钠（SDS）、吐温 80 和阿拉伯胶（GA）。室温下通过电位极化测试评估了合金在不同 GNP 纳米流体中的腐蚀性能。使用带有电子色散光谱检测器的扫描电子显微镜分析了铝合金的表面形态。实验结果表明，表面活性剂的加入提高了铝合金在纳米流体中的抗腐蚀性。这是由于表面活性剂吸附在合金表面形成保护膜层，从而降低了透湿性，增强了缓蚀效果。研究发现，添加 GA 的缓蚀效率最高。其次是吐温 80、SDS 和 SDBS，它们的抑制作用最小。XRD 腐蚀后分析还显示，浸入所有不同 GNP 纳米流体的电极表面都存在氧化铝和氢氧化铝相。

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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Solid State Phenomena

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