Journal
THIN SOLID FILMS
Volume 520, Issue 24, Pages 7136-7143Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.tsf.2012.07.115
Keywords
Mussel adhesive protein; Adsorption; Films; Cross-linking; Corrosion protection; Chemical analysis; In situ AFM
Categories
Funding
- Mistra (The Foundation for Strategic Environmental Research)
- SSF program Microstructure, Corrosion and Friction Control Sweden
- Forska and Vax program
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Electrochemical measurements, in situ and ex situ atomic force microscopy (AFM) experiments and infrared reflection absorption spectroscopy (IRAS) analysis were performed to investigate the formation and stability as well as corrosion protection properties of mussel adhesive protein (Mefp-1) films on carbon steel, and the influence of cross-linking by NaIO4 oxidation. The in situ AFM measurements show flake-like adsorbed protein aggregates in the film formed at pH 9. The ex situ AFM images indicate multilayer-like films and that the film becomes more compact and stable in NaCl solution after the cross-linking. The IRAS results reveal the absorption bands of Mefp-1 on carbon steel before and after NaIO4 induced oxidation of the pre-adsorbed protein. Within a short exposure time, a certain corrosion protection effect was noted for the pre-formed Mefp-1 film in 0.1 M NaCl solution. Cross-linking the pre-adsorbed film by NaIO4 oxidation significantly enhanced the protection efficiency by up to 80%. (C) 2012 Elsevier B.V. All rights reserved.
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