Preparation and hot-dip galvanizing application of CeO₂/Zn nanocomposite

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ÎÄÕÂÒ³Â룺203 - 207

Key words£ºnanocomposite£» high-energy ball milling£» hot-press sintering£» hot-dip galvanizing£» corrosion resistance

Abstract: CeO₂/Zn nanocomposite was fabricated by high-energy ball milling and subsequent hot-press sintering under vacuum. The produced nanocomposite powders and bulks were characterized using X-ray diffraction £¨XRD£©, transmission electron microscopy £¨TEM£© and scanning electron microscopy £¨SEM£© with an energy dispersive X-ray spectrum £¨EDS£©. The as-fabricated nanocomposite bulks were added successfully into the hot-dip galvanizing bath to improve the corrosion resistance of coatings. The results show that after milling for 120¤@min, nano-sized CeO₂ particles are distributed homogeneously on the surface of fine Zn particles to form spherical-like nanocomposite powder with narrow grain size distribution. The subsequent sintering does not lead to a dramatic grain growth, and the distribution of CeO₂ nanoparticles in the composite bulk is also homogeneous. With the addition of as-prepared bulks, the corrosion resistance of the galvanized coatings is improved obviously. It provides a feasible route for adding CeO₂ nanoparticles into the hot-dip galvanized coating.

»ù½ðÐÅÏ¢£ºAdvanced Technology Item of Jiangsu Province, China