Metal material with a bismuth film attached and method for producing same, surface treatment liquid used in said method, and cationic electrodeposition coated metal material and method for producing same
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United States of America Patent
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May 26, 2015
Grant Date -
Jan 15, 2015
app pub date -
Sep 19, 2014
filing date -
May 29, 2008
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Abstract
A metal material is provided with a bismuth coating which enables the subsequent coating to be accomplished at a high throwing power, and has excellent corrosion resistance, coating adhesion and is able to be produced with reduced damage to the environment. The metal material has a surface and a bismuth-containing layer deposited on at least a part of the surface of the metal material, wherein the percentage of bismuth atoms in the number of atoms in the surface layer of the metal material with a bismuth coating is at least 10%.
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