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首页> 外文期刊>Journal of Materials Engineering and Performance >Effect of Surface Treatment on Bio-corrosion in Aluminum Alloy 2024-T3
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Effect of Surface Treatment on Bio-corrosion in Aluminum Alloy 2024-T3

机译：表面处理对铝合金生物腐蚀的影响2024-T3

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Bio-corrosion is one of the major problems faced in any engineering/aerospace industry. The present study focuses on understanding the effect of surface treatment on AA2024-T3 on bio-corrosion in aircraft fuel tanks. The microbial attack on aluminum alloy (2024-T3) in aircraft fuel tanks by Pseudomonas aeruginosa was studied. Substrates with (1) chromate-free surface treatment (anodization; 2) Ormosil coatings doped with inhibitors/derivatives known for antimicrobial properties were evaluated for their bio-corrosion protection efficiency as compared to bare coupons. The coupons were immersed in aviation fuel spiked with the test culture. The changes in chemical parameters of test solution like pH were monitored periodically. A probable relationship between number of organisms, changes in pH and the extracellular protein (hypothesized to be produced by organisms) were evaluated. Our studies indicated that pH did not appear to play a crucial role in biofilm formation. Surface morphology of bare and anodized AA2024-T3 coupons before and after electrochemical impedance studies (EIS) was analyzed using FE-SEM. Anodized samples with least i(corr) value of (0.075x10(-6)Acm(-2)) and corrosion rate of (0.12x10(-2)mm/y) after 60days showed distinct corrosion protection than bare and the coated samples. Additional evidence in support of corrosion protection efficiency of anodized was obtained by the biofilm barrier efficiency of 98.94%.
机译：生物腐蚀是任何工程/航空航天行业面临的主要问题之一。本研究致力于了解表面处理对AA2024-T3对飞机燃料箱中生物腐蚀的影响。研究了Pseudomonas Aeruginosa的飞机燃料箱中的铝合金（2024-T3）的微生物攻击。与裸杯相比，评估具有（1）无铬酸盐表面处理（阳极氧化; 2）掺杂有抗微生物性质所称抗微生物性质的抑制剂/衍生物的涂层的涂层。优惠券浸入了随着试验培养物飙升的航空燃料中。定期监测测试溶液的化学参数的变化。评价生物数，pH值和细胞外蛋白的变化（假设用生物体产生）之间可能的关系。我们的研究表明，pH在生物膜形成中没有发挥至关重要的作用。使用Fe-SEM分析了电化学阻抗研究（EIS之后的裸露和阳极氧化AA2024-T3优惠券的表面形态。阳极氧化样品具有最少的I（COR）值（0.075x10（-6）ACM（-2））和（0.12x10（-2）mm / y）的腐蚀速率比裸露和涂覆的样品显示出明显的腐蚀保护。通过生物膜阻挡效率为98.94％，获得了支持阳极氧化腐蚀效率的额外证据。

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