1. Soudap Engineering Company, 14803-655, Araraquara, Brazil.
2. São Paulo State University - UNESP, Chemistry Institute, 14800-900, Araraquara, Brazil.
3. Corrosion and Protection Centre, School of Materials, The University of Manchester, M13 9PL, Manchester, United Kingdom.
4. Materials Performance Centre, School of Materials, The University of Manchester, United Kingdom.