Combined tannate/decanoate coatings |
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| Institution: | 1. Department of Biophysics, Escola Paulista de Medicina, Universidade Federal de São Paulo, Rua Botucatu 862, 04023-062 São Paulo, Brazil;2. Applied Physics Department, Institute of Physics, University of São Paulo, Rua do Matão, Travessa R 187, 05508-900 São Paulo, Brazil;3. Department of Biochemistry, Institute of Chemistry, University of São Paulo, Avenida Prof. Lineu Prestes 748, 05508-900 São Paulo, Brazil |
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| Abstract: | This study focused on tannate and decanoate coatings on iron surfaces and their potential combinations. The properties of the coatings were evaluated using a broad range of methods: spectrophotometry, contact angles measurement, impedance spectroscopy, mass gain, glow discharge optical emission spectroscopy (GD-OES), resistometry, and exposure experiments complete with digital image analysis. A decanoate coating was superior in a humid environment (low wettability and water vapour permeability) than tannate. A combined coating, with tannate deposited initially and then sealed in a decanoate bath, appeared to provide an ideal coating. |
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