Fe-O-Si covalent bonds

A better anticorrosion performance of the hybrid coatings was observed in comparison to that of neat polymer. This has been attributed to the stronger adhesion strength of the hybrid coatings. The increase in the adhesion strength of the coatings on a cold-rolled steel electrode can be attributed to the formation of Fe—O—Si covalent bonds at the interface of the hybrid coating [230]. 

The other important observation from the same era was made by Gettings and Kinloch using SSIMS (94J. When studying the fracture surfaces of adhesive joints fabricated using various silane-based primers, they were able to draw a direct correlation between good joint durability and the presence of an mtz = 100+ ion in the SSIMS spectrum at the failure surface (Fig. 13). The ion was attributed to an Fe-O-Si covalent bond and was present only for the... 

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