FEASIBILITY OF FOURIER-TRANSFORM LASER MICROPROBE MASS-SPECTROMETRY FOR THE ANALYSIS OF LUBRICATING EMULSIONS ON ROLLED ALUMINUM

Additives from lubricating emulsions used in the rolling step of alumi nium plate production, are suspected to adhere to the surface and chan ge the surface properties of the metal. The present study aims at inve stigating the feasibility of a Fourier transform laser microprobe mass spectrometer with external ion source to characterize the organic com ponents at the metal surface, Special attention is given to the possib le interactions between the additives and the aluminium. The experimen ts primarily involve model systems, consisting of aluminium with a thi n coating of the individual components or of laboratory-made mixtures.