Aqueous anti-rust surface treatment composition and surface-coated metal member
AssigneeHoden Seimitsu Kako Kenkyusyo Co., Ltd.
InventorsYukihiro Kang, Takafumi Koshina
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Abstract
An aqueous anti-rust surface treatment composition used for forming a film on a surface of a metal member of the present invention contains a silane coupling agent; a water-soluble transition metal compound containing a water-soluble titanium compound or a water-soluble zirconium compound; a condensed phosphate; and a solvent containing water, in which the condensed phosphate contains a highly condensed phosphate which is a salt of high condensate of equal to or more than four phosphoric acids.
Claims15
An aqueous anti-rust surface treatment composition used for forming a film on a surface of a metal member, comprising:
- a silane coupling agent;
- a water-soluble transition metal compound containing a water-soluble titanium compound or a water-soluble zirconium compound;
- a condensed phosphate;
- and
- a solvent containing water and an alcohol,
- wherein the condensed phosphate contains a highly condensed phosphate which is a salt of high condensate of equal to or more than four phosphoric acids,
- wherein a content of the highly condensed phosphate which is a salt of high condensate of equal to or more than four phosphoric acids is equal to or more than 1 part by mass and equal to or less than 100 parts by mass, with respect to 100 parts by mass of content of the silane coupling agent, and
- the content of the alcohol is equal to or more than 20 parts by mass and equal to or less than 300 parts by mass, with respect to 100 parts by mass of content of the silane coupling agent.
An aqueous anti-rust surface treatment composition which imparts anti-rust performance to a metal member by being applied to a surface of the metal member, comprising:
- a silane coupling agent;
- a titanium chelating agent;
- a salt of polyphosphoric acid having condensation degree of equal to or more than 4;
- water, and
- an alcohol,
- wherein a content of the salt of polyphosphoric acid having condensation degree of equal to or more than 4 is equal to or more than 1 part by mass and equal to or less than 100 parts by mass, with respect to 100 parts by mass of content of the silane coupling agent, and
- the content of the alcohol is equal to or more than 20 parts by mass and equal to or less than 300 parts by mass, with respect to 100 parts by mass of content of the silane coupling agent.
Dependencies are inferred from the claim text.