Research on Decay Resistance of Commonly Used Plates for Automobile Bodies
The decay resistance of commonly used body panels was an important reference standard for the selection of body panels,the neutral salt spray respective comparison test of bare and electrophoresis panels was conducted on the hot-dip aluminum-silicon coated panels that were processed into parts,the hot-dip aluminum-silicon coated panels that were pro-cessed into parts,the electro-galvanized panels,the hot-dip galvanized panels,hot-formed steel bare sheets and cold-rolled sheets.The results showed that the decay resistance of the panels with the plating was significantly superior to that of the panels without the plating.Plate,the hot-dip aluminum-silicon plating plate processed into parts would be destroyed,which resulted into a decrease in the decay resistance of the bare plate,but the decay resistance of its electrophoresis plate before and after the processing did not changed significantly,scratching and corrosion expansion increased on the contrary.The ox-idation film and decarburization layer of the thermoformed steel bare plate formed during the process corroded in the neutral salt spray conditions 4 h,and its electrophoresis plate and electrophoresis scratches on the board of the neutral salt spray test showed serious blistering problems.
hot-dip aluminum-silicon coated sheetelectro-galvanized sheetshot-dip galvanized sheetshot-formed steel bare sheetscold-rolled sheetsneutral salt spray corrosiondecay resistance
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