Deposition of hybrid 3-GPTMS's film on AA2024-T3: Dependence of film morphology and protectiveness performance on coating conditions |
| |
| Authors: | M Mrad MF Montemor L Dhouibi E Triki |
| |
| Affiliation: | 1. Unité de Recherche “Corrosion et Protection des Métalliques”, Ecole Nationale d’Ingénieurs de Tunis, le Bélvédère, 1002 Tunis, Tunisia;2. Institut National des Sciences Appliquées et de Technologie, Centre Urbain Nord Tunis, Tunisia;3. Instituto Superior T´ecnico, ICEMS, Department of Chemical Engineering, Av. Rovisco Pais, 1049-001 Lisboa, Portugal |
| |
| Abstract: | This paper describes the elaboration of 3-glycidoxypropyltrimethoxysilane (3-GPTMS) films onto AA2024-T3 aluminum alloy for corrosion protection.The dependence of sol–gel morphology on both precipitation under cathodic polarization and nitrate incorporation was investigated via scanning electron microscopy (SEM).Once added into silanization solution, sodium nitrate promoted the reaction of silane condensation and enhanced the film compactness.Electrochemical impedance spectroscopy results (EIS) indicated that doping silane film with NaNO3 ameliorated its barrier property and protectiveness. Silane films applied onto AA2024-T3 surface by using potentiostatic method, exhibited obviously higher corrosion resistance than those obtained by conventional “dip-coating” method. The resistance of coating is accentuated when not very negative potential was applied. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
