Deposition of hybrid 3-GPTMS's film on AA2024-T3: Dependence of film morphology and protectiveness performance on coating conditions

Fevereiro 2012

This paper describes the elaboration of 3-glycidoxypropyltrimethoxysilane (3-GPTMS) films onto AA2024-T3 aluminum alloy for corrosion protection. The dependence of solgel 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.

Autores da comunidade :

• 

  M

  Maria de Fátima Grilo da Costa Montemor

  ist23859

  Afiliações e fontes

  IST > CQE

  Centro de Química Estrutural

  IST > DEQ

  Departamento de Engenharia Química

  De: scopus

  ID: 2-s2.0-84655163937

  De: orcid

  ID: 17205629

VoR - Versão publicada

Elsevier BV

Progress in Organic Coatings

264

271

73

2-3

0300-9440

10.1016/j.porgcoat.2011.11.019

chemical-sciences - Química

Palavras-chave

• Materials Chemistry
• Organic Chemistry
• Surfaces, Coatings and Films
• General Chemical Engineering

eng - Inglês