1. Instituto de Pesquisas Energéticas e Nucleares, Av. Prof. Lineu Prestes 2242, São Paulo, Brazil 05508-000.
2. Vrije Universiteit Brussel, Research Group Electrochemical and Surface Engineering, Pleinlaan 2, Brussels, Belgium 1050.
3. Institute for Technological Research, Laboratory for Corrosion and Protection, Av. Prof. Almeida Prado 532, São Paulo, Brazil 05508-901.