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Abstract
AbstractA protective chemical conversion coating, developed on zincplate from a silicate aqueous solution, was found to be more effective in anticorrosive performance than molybdate, tungstate and some heteropoly acid conversion coatings. The relative atomic percent content (A.C. %) of the film, obtained from the constant elemental composition region of the AES profile curves, were oxygen 59.2 zinc 5.9% silicium 19.1%, nitrogen 2.7%, sulfur 4.2%, phosphorus 3.6% and carbon 5.3%. The results of XPS analysis showed that zinc existed as zinc sulfide in the surface layer of the film, while as zinc oxide in the internal layer of the film.
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