Blown Soybean Oil Ceramer Coatings for Corrosion Protection

✍ Scribed by Ganghua Teng; Mark D. Soucek

• Publisher: John Wiley and Sons
• Year: 2003
• Tongue: English
• Weight: 316 KB
• Volume: 288
• Category: Article
• ISSN: 1438-7492
• DOI: 10.1002/mame.200300118

✦ Synopsis

Abstract

A series of ceramer coatings were formulated using blown soybean oil as the organic phase, and sol‐gel precursors [titanium(IV) isopropoxide, titanium(IV) diisopropoxide bisacetoacetonate, and zirconium propoxide] as the inorganic phase. The corrosion resistance of the ceramer coatings was evaluated using failure‐at‐scribe and electrochemical impedance spectroscopy (EIS) on aluminium after exposure in a Prohesion Chamber. Scanning electron microscopy (SEM) and energy dispersive X‐ray analysis (EDXA) were also used to evaluate the coatings after exposure. The ceramer coatings demonstrated higher pull‐off adhesion, impedance modulus (after exposure), and lower failure‐at‐scribe than the blown soybean oil film. It was surmised that the addition of sol‐gel precursor enhanced the corrosion protective properties of the ceramer coatings via a self‐assembling layer of metal‐oxo clusters at the film substrate (aluminium) interface.

Impedance modulus of TIP‐based ceramer coatings as a function of exposure time.

magnified imageImpedance modulus of TIP‐based ceramer coatings as a function of exposure time.