Method of cationic electrodeposition coating and coated...

Details Method of cationic electrodeposition coating and coated... Method of cationic electrodeposition coating and coated...

C - Chemistry, Metallurgy

09

D

C09D 163/04 (2006.01) C09D 5/44 (2006.01) C25D 13/04 (2006.01) C25D 13/20 (2006.01)

Patent

CA 2376349

It is an object of the present invention to provide a cationic electrocoating method capable of producing a coating film with high filiform-rust resistance, corrosion resistance, and rust prevention and a coated article obtainable by the method. A cationic electrocoating method comprising electrocoating a surface of an aluminum substrate with a cationic electrodeposition coating composition, wherein said aluminum substrate is subjected to a chemical conversion with a surface treating reagent not containing a heavy metal, and wherein said cationic electrodeposition coating composition contains a sulfonium- and propargyl-containing resin composition. A cationic electrocoating method comprising electrocoating a surface of an aluminum substrate with a cationic electrodeposition coating composition, wherein said aluminum substrate is not subjected to a chemical conversion with a surface treating reagent, and wherein said cationic electrodeposition coating composition contains a sulfonium- and propargyl-containing resin composition. A coated article obtainable by the above cationic electrocoating method.

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