Silane Coupling Agents as Adhesion Promoters for Aerospace Structural Film Adhesives

Thiedmanu, W.; Tolan, F. C.; Pearce, P. J.; Morris, C. E. M.

doi:10.1080/00218468708071243

Cited by 52 publications

(11 citation statements)

References 5 publications

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“…2B), indicating that the sol-gel layer indeed enhances coating adhesion to the painted surface. This phenomenon agrees well with other research reports [13,14], where GPTS served as an adhesion promoter for aluminum and plastic substrates. A possible structure for the TiO 2 sol-gel coating in this study is proposed in Fig.…”

Section: Synthesis Of Tio 2 Sol-gel Coating Onto a Paint Surfacesupporting

confidence: 94%

Solar-driven self-cleaning coating for a painted surface

Cai

Van

et al. 2005

Comptes Rendus. Chimie

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Section: Synthesis Of Tio 2 Sol-gel Coating Onto a Paint Surfacesupporting

confidence: 94%

Solar-driven self-cleaning coating for a painted surface

Cai

Van

et al. 2005

Comptes Rendus. Chimie

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“…Table 8 shows liform corrosion test results on silane-treated samples. For the polyurethane paint, the results from best to worst are the two-step°-APS/BTSE treatment (9, 10), BTSE only (13,14), chromate treatment (15), mixture treatments (5, 6) and°-APS only (1,2). These results are in good agreement with EIS and salt spray test results with the polyurethane paint.…”

Section: Corrosion Testingmentioning

confidence: 99%

Bonding and corrosion protection mechanisms of γ-APS and BTSE silane films on aluminum substrates

Song¹,

Ooij²

2003

Journal of Adhesion Science and Technology

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Films of°-aminopropyltriethoxysil ane (°-APS), 1,2-bis[triethoxysilyl ] ethane (BTSE) and their mixtures adsorbed onto pure aluminum from aqueous solutions were characterized by means of ellipsometry, infrared spectroscopy (IR) and X-ray photoelectronspectroscopy (XPS). It was found that after hydrolysis in water the silanes were readily adsorbed onto aluminum oxide surfaces initially forming hydrogen bonds. Upon curing, such bonds are replaced by metallosiloxane bonds, Si O Al. The remaining silanol groups in the lm condense and form Si O Si bonds. As the Si O Al bonds are known to hydrolyze, the corrosion protection is related to the hydrophobicity of the siloxane lms formed on the metal substrate. BTSE lms are acidic as they contain free silanol groups, therefore these are compatible with some paints but not with others. Electrochemical impedance spectroscopy (EIS) results, salt spray test results and liform corrosion test results showed that some silane treatments, such as two-step°-APS /BTSE and BTSE only, provided better corrosion protection on aluminum substrates as compared with a chromate treatment. Mechanisms of adhesion and corrosion protection of these silane lms on aluminum substrates are proposed.

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“…However, epoxy absorbs moisture easily, and the diffusion of absorbed water into the epoxy–steel interface weakens the interfacial adhesion strength between epoxy and steel, particularly in wet conditions 4, 5. To overcome this problem, a silane coupling agent has been used for corrosion protection in an organic coating/steel system 6–11. Several studies have been undertaken to investigate the effectiveness of silanes for metal corrosion protection with structural adhesives 6–8…”

Section: Introductionmentioning

confidence: 99%

Corrosion protection of epoxy-coated steel using different silane coupling agents

Jang

Kim

1999

J. Appl. Polym. Sci.

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ABSTRACT:To suppress steel corrosion at elevated temperature and in humid condition, silane coupling agents N-␤-aminoethyl aminopropyltrimethoxysilane (AAPS), ␥-glycidoxypropyltrimethoxysilane (GPS), and bis[3-(trimethoxysilyl)-1-phenylpropyl]tetrasulfide (RC-2) were introduced as primers into an epoxy/steel system. Silane coupling agents and epoxy were coated onto the steel surface using the solution casting method. The polymer degradation and steel corrosion formation after heat and humid treatment were investigated by Fourier transform infrared reflection and absorption spectroscopy (FTIR-RAS) and scanning electron microscopy (SEM). Compared to various silane treated epoxy/steel systems, the AAPS-treated epoxy/steel (AAPS/epoxy ϭ 6 : 4) system suppressed steel corrosion at 400°C for 10 min in air and for 5 days at 60°C in 100% relative humidity. This is due to the formation of SiOOOSi linkage and FeOOOSi bond on steel surface, which are resistant to water diffusion and thermally stable at elevated temperature. The relationship between chemical bonding at the steel-epoxy interface and corrosion protection on the steel surface was also investigated.

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Silane Coupling Agents as Adhesion Promoters for Aerospace Structural Film Adhesives

Cited by 52 publications

References 5 publications

Solar-driven self-cleaning coating for a painted surface

Solar-driven self-cleaning coating for a painted surface

Bonding and corrosion protection mechanisms of γ-APS and BTSE silane films on aluminum substrates

Corrosion protection of epoxy-coated steel using different silane coupling agents

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