Finishing Agent and Member Having an Overcoat Formed from the Finishing Agent
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United States of America Patent
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Issued Date -
Jun 30, 2011
app pub date -
May 26, 2009
filing date -
May 27, 2008
priority date (Note) -
Abandoned
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Abstract
A finishing agent, which can provide a chromium-free surface treatment layer for use in forming an overcoat on an oxidation-resistant layer on a substrate, comprises an aluminum-containing substance in the form of at least one of a cation, a salt of the cation, and a coordination compound containing the cation; a zinc-containing substance in the form of at least one of a cation, a salt of the cation, and a coordination compound containing the cation; a chelating agent which is able to form a coordination compound with an aluminum ion; and a film-forming substance containing a first element selected from the group consisting of P, Mo, W, Ce, Mn, Si, Ti, Zr, and V. The preferable chelating agent is citric acid. The finishing agent may further contain an organic binder.
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