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首页> 外文会议>International Symposium on State-of-the-Art Application of Surface and Interface Analysis Methods to Environmental Material Interactions: in Honor of James E.Castle's 65th Year, Mar 26-27, 2001, Washington D.C. >Applications of Synchrotron-Based Infrared Microspectroscopy (SIRMS) to Corrosion, Contamination and Coatings
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Applications of Synchrotron-Based Infrared Microspectroscopy (SIRMS) to Corrosion, Contamination and Coatings

机译：基于同步加速器的红外显微技术（SIRMS）在腐蚀，污染和涂层中的应用

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摘要

Fourier Transform Infrared (FTIR) spectroscopy is capable of characterizing both organic and inorganic bonds in surface compounds resulting from a variety of environmental interactions. In addition to the high sensitivity inherent in the technique, use of multiple combinations of sampling configurations, including the recent development of FTIR microscopy, allows for application to challenges presented by complex or rough surfaces, thick and non-conducting corrosion product layers, and thin layers with complicated chemistry. Further value has been brought to FTIR analysis of surfaces through the use of the infrared part of the synchrotron radiation spectrum provided by vacuum ultraviolet (VUV) beamlines as a source for FTIR microspectroscopy to increase signal to noise ratios and provide a bright coherent IR source. This review will present recent results from synchrotron IR studies of (1) pitting of Al aerospace alloy AA2024-T3 surfaces resulting from acetone degreasing prior to exposure to a salt mist, (2) the mechanism of corrosion protection of AA2024-T3 by chromate conversion coatings and the effect of intermetallic compounds in the alloy matrix on coating properties, and (3) the mechanism of attachment of contaminant uranium in thick corrosion product layers formed on structural carbon steel in a humid environment and the resulting complexation and removal of uranium by citric acid.
机译：傅立叶变换红外（FTIR）光谱能够表征由于各种环境相互作用而产生的表面化合物中的有机键和无机键。除了该技术固有的高灵敏度外，使用多种采样配置组合，包括FTIR显微镜的最新发展，还可以应对复杂或粗糙的表面，厚且不导电的腐蚀产物层和薄层等挑战。化学复杂的化学层。通过使用真空紫外（VUV）光束线提供的同步加速器辐射光谱的红外部分作为FTIR显微技术的来源，以提高信噪比并提供明亮的相干IR源，为表面的FTIR分析带来了更多价值。这篇综述将提供同步加速器红外研究的最新结果：（1）航空航天合金AA2024-T3表面在暴露于盐雾之前丙酮脱脂导致的点蚀；（2）铬酸盐转化对AA2024-T3的腐蚀防护机理涂层以及合金基体中金属间化合物对涂层性能的影响；（3）潮湿环境中结构碳钢上形成的厚腐蚀产物层中污染物铀的附着机理以及由此产生的柠檬酸络合和去除铀酸。

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