Enhanced corrosion resistance for silsesquioxane coatings by diglycidyl ether of biphenol A

• Autorzy: Chen P. , Hu L. , Zhang X. , Sun D.
• Języki publikacji: EN

Abstrakty

EN

Based on silsesquioxanes (SSO), derived from hydrolytic condensation of (Gamma-glycidoxylpropyl)- trimethoxysilane (GPMS) and various amounts of tetraethoxysilane (TEOS), hybrid films (f-GST) were prepared using the sol-gel process. Because the epoxy-ring opening or the silica chains were not fully cross-linked, the f-GST was more susceptible to corrosion due to higher hydroxyl content and its hydrophilicity. Diglycidyl ether of biphenol A (DGEBA) was added into the reaction system to enhance the density of the film and to prevent epoxy ring opening during condensation. The film prepared with DGEBA, GPMS-SSO (GS) and 20 wt. % TEOS (f-GSTD) exhibited the best corrosion resistance compared with f-GST and bare aluminum alloy (AA). The f-GST and f-GSTD were studied as anticorrosion coatings on AA by electrochemical measurement. The results clearly demonstrate that samples with higher TEOS fractions have better anticorrosive performance and DGEBA obviously enhances the anticorrosion effect of f-GST.

Słowa kluczowe

EN

silsesquioxane; sol-gel; coatings; anticorrosion; electrochemical measurement

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2007
• Tom: Vol. 25, No. 3
• Strony: 843--849
• Opis fizyczny: Bibliogr. 18 poz.

Twórcy

autor

Chen P.

autor

Hu L.

autor

Zhang X.

autor

Sun D.

• Chemical Center, Harbin University of Commerce, Harbin 150076, China

Bibliografia

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