Water-based liquid treatment for aluminum and its alloys

Details Water-based liquid treatment for aluminum and its alloys Water-based liquid treatment for aluminum and its alloys

B - Operations, Transporting

05

D

B05D 1/18 (2006.01) C04B 9/02 (2006.01) C23C 22/34 (2006.01) C23C 22/48 (2006.01) C23C 22/56 (2006.01)

Patent

CA 2291140

A chromium-free water-based surface treatment liquid which contains from 0.01 to 50 g/l of a total of dissolved manganic acid, permanganic acid, and salt(s) thereof and from 0.01 to 20 g/l of a total of dissolved titanium compounds and has a pH of from 1.0 to 6.0 reacts rapidly with aluminum and aluminum alloy surfaces to deposit thereon a protective coating that does not contain hexavalent chromium and has excellent corrosion resistance and paint film holding properties.

L'invention concerne un liquide de traitement de surface à base aqueuse sans chrome contenant entre 0,01 et 50 g/l d'un total dissous d'acide manganique, d'acide permanganique et de ses sels, et entre 0,01 et 20 g/l d'un total de composés de titane dissous, et possédant un pH compris entre 1,0 et 6,0; le liquide réagit rapidement avec les surfaces en aluminium ou en alliage d'aluminium pour y déposer un revêtement protecteur ne contenant pas de chrome hexavalent et présentant une excellente résistance à la corrosion et des propriétés de retenue de pellicule de peinture.

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