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首页> 外文期刊>Corrosion Engineering, Science and Technology >Corrosion behaviour of aircraft materials in acetate and formate based antiskid chemicals
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Corrosion behaviour of aircraft materials in acetate and formate based antiskid chemicals

机译：飞机材料在醋酸盐和甲酸盐类防滑化学品中的腐蚀行为

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摘要

Corrosion behaviour of four commercial aircraft materials, Al alloy 7075-T6, high strength steel AISI 4340, Ti alloy 9046 and Mg alloy RZ5, was studied in six commercial antiskid chemicals, one sodium acetate based, three potassium acetate based, one sodium formate based and one potassium formate based, using potentiodynamic polarisation measurements (polarisation curves) and chemical exposure tests (weight change data), combined with microstructural examinations (appearance of surfaces). The results show that among the four materials, the Ti alloy experiences least corrosion, showing pitting corrosion during the polarisation measurements and significant weight gains and discoloration in the exposure tests only in Safeway SF. In contrast to this, the Mg alloy and the high strength steel underwent corrosion in all chemicals, with severe pitting corrosion (polarisation measurements), significant weight changes and discoloration (exposure tests) being observed for the Mg alloy and discoloration (exposure tests) for the high strength steel. Accordingly, sodium formate based Safeway SF is the most corrosive of the chemicals, introducing some indications of corrosion on all materials, and potassium acetate based Safeway KA HOT and potassium formate based Meltium are the least corrosive chemicals: no signs of corrosion could be observed on the Al and Ti alloys. The results also show that based only on the salt, pH value and conductivity, corrosivity of the antiskid chemicals cannot be reliably evaluated. In this paper, explanations for these observations are presented and the similarities and differences between the results from the two types of corrosion tests are discussed.
机译：研究了六种商用防滑化学品，一种醋酸钠基，三种醋酸钾基，一种甲酸钠对四种商用飞机材料，铝合金7075-T6，高强度钢AISI 4340，钛合金9046和镁合金RZ5的腐蚀行为。一种基于甲酸钾的溶液，使用电位动力学极化测量（极化曲线）和化学暴露测试（重量变化数据），并结合微观结构检查（表面外观）。结果表明，在四种材料中，钛合金的腐蚀最少，在极化测量期间显示点蚀，仅在Safeway SF的暴露测试中显示出明显的重量增加和变色。与此相反，Mg合金和高强度钢在所有化学药品中均受到腐蚀，严重的点蚀（极化测量），Mg合金的重量显着变化和变色（暴露测试）以及Mg合金的变色（暴露测试）。高强度钢。因此，基于甲酸钠的Safeway SF是最腐蚀性的化学物质，在所有材料上均显示出腐蚀迹象，而基于乙酸钾的Safeway KA HOT和基于甲酸钾的Meltium是腐蚀性最低的化学物质：在铝和钛合金。结果还表明，仅基于盐，pH值和电导率，不能可靠地评估防滑化学品的腐蚀性。在本文中，对这些观察结果进行了解释，并讨论了两种腐蚀试验结果之间的异同。

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