A study on the corrosion processes of eutectic Bi-42Sn solder alloy
AbstractThe change of impedance in the passive, repassive states together with initial pitting process of eutectic Sn-Bi alloy is studied. Anodic polarization measures the passive, pitting, and repassive states to utilize the actual results and to assure the accuracy of the impedance results. X-ray photoelectron spectroscopy indicates that Sn oxides interact with Bi oxides to form a passive film. The dissolution of Bi accounts for the initial pitting and Sn oxides form the repassive film.
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