Study of initial stages of Al-Mg alloy corrosion in water, chloride and Cu(II) environment by a scanning Kelvin probe and XPS
Study of initial stages of Al-Mg alloy corrosion in water, chloride and Cu(II) environment by a scanning Kelvin probe and XPS
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DOI：
10.1016/s1388-2481(03)00015-8
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发表时间：
2003-02-01
影响因子：
5.4
通讯作者：
Fürbeth, W
中科院分区：
文献类型：
--
作者：
Juzeliunas, E;Sudavicius, A;Fürbeth, W
用扫描Kelvin探针（SKP）和X射线光电子能谱（XPS）研究了Al-Mg合金在水、3.5%NaCl溶液和含50 ppm Cu（II）的3.5%NaCl溶液中腐蚀初期形成的腐蚀产物层。SKP时空图像重建腐蚀样品上的溶液-空气边界。SKP检测铝镁合金表面腐蚀产物层的灵敏度可达亚纳米级。预记录表面上的伏打电位响应取决于浸泡时间（氧化层厚度）和所用溶液的种类（氧化层导电性）。在纯水中腐蚀的表面上测得的伏打电位高于暴露于3.5%NaCl或3.5%NaCl + 50 ppm Cu（II）溶液的表面上测得的伏打电位。这种差异已被解释在较高的导电性的腐蚀产物层中开发的含离子的介质。(C)2003 Elsevier Science B. V.保留所有权利。
Corrosion product layers formed during initial corrosion stages on Al-Mg alloy in water, 3.5% NaCl solution and 3.5% NaCl containing 50 ppm Cu(II) have been studied by scanning Kelvin probe (SKP) and X-ray photoelectron spectroscopy (XPS). The SKP spatio-temporal images reconstructed the solution-air boundary on corroded samples. The SKP sensitivity to detect the corrosion products layer on Al-Mg alloy was demonstrated to be in subnanometer scale. The Volta potential response on precorroded surfaces depended upon the immersion time (oxide layer thickness) and a kind of the solution used (oxide layer conductivity). The Volta potentials measured on the surfaces corroded in pure water were higher than those on the surfaces exposed to 3.5% NaCl or 3.5% NaCl + 50 ppm Cu(II) solutions. This difference has been explained in terms of higher conductivity of the corrosion product layers developed in the ion-containing media. (C) 2003 Elsevier Science B.V. All rights reserved.