COMPOSITION FOR DIRECT-CURRENT CATHODIC ELECTROLYSIS, LUBRICATION-FILM-EQUIPPED METAL MATERIAL, AND PRODUCTION METHOD THEREFOR
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United States of America Patent
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Mar 16, 2017
app pub date -
Feb 16, 2015
filing date -
Feb 21, 2014
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Abstract
A composition for direct-current cathodic electrolysis. The composition is capable of forming a lubrication-film-equipped metal material exhibiting excellent lubrication properties and excellent chemical conversion properties after degreasing. This composition for direct-current cathodic electrolysis includes: (A) at least one metal ion selected from the group consisting of typical metal ions (excluding zinc ion) having a valency of at least 2 and rare-earth-element ions, or a complex thereof; (B) an organic acid compound including, in the molecule thereof, a carboxyl group, and a straight-chain alkylene group having at least 4 carbon atoms; and (C) water.
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