Abstract
The use of diffuse reflectance Fourier transform-infrared spectroscopy for the analysis of rosin flux residues on metal oxide powders, after exposure to high-temperature soldering conditions, is examined. The flux is shown to solvate some metal ions to form metal-carboxylate salt complexes. The ability of nonactivated rosin flux to remove possible corrosion products of copper-tin/lead solder joint areas is discussed.
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