Composite-coated flat-rolled sheet metal manufacture and product
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United States of America Patent
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Jan 28, 1992
Issued Date -
N/A
app pub date -
Mar 3, 1989
filing date -
Apr 25, 1986
priority date (Note) -
Expired
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Abstract
Composite-coated flat-rolled steel, product, method of manufacture and method of fabrication in which single or double-reduced low-carbon steel, after surface preparation, is flash-coated with tin (about 0.05 #/bb) which is alloyed with the base metal. Dichromate treatment passivates the tin-iron alloy surfaces depositing a chrome oxide layer prior to application of an organic coating (about 3 to 15 mg/in.sup.2 to each surface). Enhanced coating adhesion of the organic coating enables draw-processing of the double-reduced steel base metal substrate into unitary can bodies without damage to coating or substrate.
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