CHEMICAL CONVERSION COATING, CHEMICAL CONVERSION COATING TREATMENT LIQUID, METHOD FOR FORMING THE CHEMICAL CONVERSION COATING, SOLUTION CONTAINING RARE EARTH ELEMENT USED IN THE METHOD FOR FORMING THE CHEMICAL CONVERSION COATING AND MEMBER EQUIPPED WITH THE CHEMICAL CONVERSION COATING

Title:

Document Type and Number:

Japanese Patent JP2012122121

Kind Code:

A

Abstract:

To provide a chemical conversion coating that is substantially free of vivid colors observed in a colored chromate using hexavalent chromium, i.e. colors such as yellow, orange, red and green, without deteriorating other performances of a trivalent chromium chemical conversion coating, a chemical conversion coating treatment liquid, a method for forming the chemical conversion coating, a solution containing rare earth elements used in the method for forming the chemical conversion coating, and a member equipped with the chemical conversion coating.

The chemical conversion coating is formed on a member having a metal surface and is a colorless chemical conversion coating that contains trivalent chromium and ≥0.0010 g/m² rare earth elements, has a thickness of 50-1,000 nm and is free of hexavalent chromium.

Inventors:

HORIE HIDEKAZU
MAKINO TOSHIAKI
MASUDA ASAMI
OKAMOTO IE

Application Number:

JP2010276058A

Publication Date:

June 28, 2012

Filing Date:

December 10, 2010

Export Citation:

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Assignee:

NIPPON HYOMEN KAGAKU KK

International Classes:

C23C22/06

Domestic Patent References:

JPH0310714B2	1991-02-14
JP2004346360A	2004-12-09
JP2004010937A	2004-01-15

Attorney, Agent or Firm:

Axis International Patent Business Corporation

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