Pretreatment of Aluminum Alloy 6060 by Selective Removal of Surface Intermetallics
Pretreatment of Aluminum Alloy 6060 by Selective Removal of Surface Intermetallics
复制标题
选择性去除表面金属间化合物对铝合金 6060 进行预处理
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
K. Nisancioglu
中科院分区：
文献类型：
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作者：
O. Lunder;K. Heen;K. Nisancioglu
本文研究了从6060铝合金（AA 6060 [UNS A96060]）表面去除α-Al（Fe，Mn）Si颗粒的不同方法，目的是研究这种预处理是否能降低环氧涂层表面的丝状腐蚀（FFC）敏感性。的方法，其中包括浸泡在硝酸-氢氟酸（HNO 3-HF），以及恒电位蚀刻在氯化物溶液和硝酸，分别表现出高效率，根据扫描电子显微镜（SEM）观察和阴极极化测量在0.1-M氯化钠（NaCl）溶液。从AA 6060表面去除α-Al（Fe，Mn）Si颗粒使阴极活性降低到与在无铁AA 6060模型模拟合金（AlMg0.5Si0.4）上测量的水平相似的水平。然而，虽然后者对FFC完全免疫，但表面颗粒去除处理并没有显著降低AA 6060的FFC敏感性，因为细丝生长是由阴极和阳极支持的。
Abstract Different methods of removing the α-Al(Fe,Mn)Si particles from the surface of aluminum alloy 6060 (AA6060 [UNS A96060]) have been studied, with the purpose of finding out whether such pretreatment reduces the susceptibility to filiform corrosion (FFC) of epoxy-coated surfaces. The methods, which included immersion in nitric-fluoric acid (HNO3-HF) as well as potentiostatic etching in chloride solution and nitric acid, respectively, exhibited a high efficiency according to scanning electron microscopic (SEM) observations and cathodic polarization measurements in 0.1-M sodium chloride (NaCl) solution. Removal of the α-Al(Fe,Mn)Si particles from the surface of AA6060 reduced the cathodic activity to a level similar to that measured on an iron-free AA6060 model analogue alloy (AlMg0.5Si0.4). However, while the latter was completely immune against FFC, superficial particle removal treatment did not significantly reduce the FFC susceptibility of AA6060 because filament growth was supported by cathodic a...