Direct Measurement of Trace Contamination on Metallic Surfaces Using ATR/FTIR
Hydrocarbon surface contamination on rolled aluminum sheets is generally caused by lubricants used to control friction during processing. Despite de-oiling treatments, oil residues may remain and its detection is often paramount prior to downstream processing. In the case of radiators, condensers, and evaporators, oil contamination on aluminum prevents proper brazing. When this occurs, these types of manufactured components are prone to leak. Therefore, a fast method to evaluate contamination on aluminum that requires no sample preparation is desirable.
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