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Determining the molecular composition of modified aluminum surfaces using vibrational spectroscopies

机译：使用振动光谱法测定改性铝表面的分子组成

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Abstract: The surface of aluminum alloy sheet often is chemically modified to promote wetting, corrosion resistance, and adhesion of polymeric coatings. A detailed description of the molecular composition of such pretreated surfaces usually is unknown, although this knowledge is vital in designing better surfaces. Both reflection-absorption infrared spectroscopy and surface- enhanced Raman spectroscopy have been employed to characterize thin (few tens of angstroms) films on aluminum. The results from these studies on chromate-phosphate coatings (chromium phosphate conversion coatings) and phosphonic acid anodized layers on aluminum have provided a more detailed understanding of the structure of these engineered surfaces. The nature of interaction between the pretreatment species and the aluminum substrate has been determined, and a possible orientation of these species with respect to the substrate is suggested. The strengths and limitations of both techniques are discussed within the confines of investigating rough aluminum surfaces. !24
机译：摘要：铝合金薄板的表面经常经过化学改性，以促进聚合物涂层的润湿性，耐腐蚀性和粘附性。尽管这种知识对于设计更好的表面至关重要，但通常不知道对此类预处理表面的分子组成的详细描述。反射吸收红外光谱和表面增强拉曼光谱都已被用来表征铝上的薄膜（几十埃）。这些对铝上铬酸盐-磷酸盐涂层（磷酸铬转化涂层）和膦酸阳极氧化层的研究结果提供了对这些工程表面结构的更详细的了解。已经确定了预处理物质与铝基底之间相互作用的性质，并提出了这些物质相对于基底的可能取向。在研究粗糙的铝表面的范围内讨论了这两种技术的优点和局限性。 ！24

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