| Summary: | 碩士 === 國防大學理工學院 === 化學工程碩士班 === 100 === In this study, based on electro-galvanized substrate Zirconium-Titanium into treatment, to investigate the corrosion properties of non-chromium film. Experiments mainly use the LP of the corrosion resistance of the oxide film, EIS analysis of the impedance of the film density, SEM observation of film surface and cross-sectional patterns, XPS analysis of the distribution of elements of the Zirconium-Titanium film at different depths under the circumstances, and to deduce the composition of the oxides.
The study results show that the Zirconium-Titanium conversion treatment on galvanized substrate, can form a protective layer in order to eliminate the corrosion reaction of the zinc substrate, but we can see of the film-forming ability to protect from salt spray results cannot be achieved in general industry set given anti-corrosion performance. Radical salts, add phosphate significantly improved solvent resistance of film and of film thickness will effectively enhance the salt spray test results from 120nm to 900nm, add phosphate of zirconium titanium film to salt spray time upgrade from 48hr to 144hr, said to add the zirconium titanium phosphate film can reach the traditional chromate coating corrosion performance.
Keywords: non-chromium film, corrosion resistance, electro-galvanized
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