Some observations for effects of copper on zinc phosphate conversion coatings on aluminum surfaces
2002; Elsevier BV; Volume: 155; Issue: 1 Linguagem: Inglês
10.1016/s0257-8972(02)00027-0
ISSN1879-3347
AutoresXueliang Sun, Darija Susac, R. Li, K.C. Wong, Tim Foster, K.A.R. Mitchell,
Tópico(s)Copper Interconnects and Reliability
ResumoX-Ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and electrochemical measurements have been used to characterize zinc phosphate (ZPO) conversion coatings, formed on high-purity aluminum surfaces, after dipping in coating baths containing different concentrations of Cu2+ up to 50 ppm. Significant variations in the morphology, adhesion and corrosion protection afforded by the ZPO coatings are especially observed as the Cu2+ in the bath varies from 0 to 10 ppm. Comparisons are made with the effects of surface Cu segregation on ZPO coatings formed in a previous study made on Al-2024-T3 alloy.
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