Anticorrosive cerium-based coatings prepared by the sol–gel method
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The development of efficient anti-corrosion and environmentally friendly coating systems are needed for the replacement of the highly toxic Cr-based conversion coatings for corrosion protection of aluminum alloys. In this study, we demonstrate that the direct application of ceramic cerium-based sol–gel coatings to AA7075-T6 substrates produces high-performance anti-corrosion layers. Electrochemical experiments and analyses of the microstructure demonstrate that the protective layers are very efficient for the passivation of the alloy surfaces operating as both passive and active barrier for corrosion protection.
KeywordsSol–gel growth Active protection Passive protection Self-healing AA7075-T6 X-ray photoelectron spectroscopy (XPS)
The authors wish to thank the Brazilian Funding Institution FAPESP (Proc.: 06/50692–2, 05/04641–4 and 2004/12189–1) for the scholarships and financial support.
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