Method of treating a metal surface

Details Method of treating a metal surface Method of treating a metal surface

B - Operations, Transporting

23

K

B23K 9/00 (2006.01) B22D 11/00 (2006.01) B41N 1/08 (2006.01) B41N 3/03 (2006.01) H01F 1/00 (2006.01)

Patent

CA 2173748

Substantial surface areas (10) can be treated by continuously magnetically moving an electric arc (14) on the surface substantially continuously around a general loop direction such as a circle, ellipse or oval and moving the surface so that the arc (14) treats a substantial surface area The arc treatment can be used to clean or roughen a surface (10) and a reactant or treatment agent (140) can be brought to the arc (14) contact site to alter the surface (130) treated with the arc. Auxiliary treatments for the surface can precede or follow the arch treatment, or both. The invention produces very desirable surface properties including a mild roughness or matte condition suitable even for critical applications such as aluminum lithoplate. Other surface characteristics can include or or more of: capillarity, adhesion, uniform emissivity, stable oxide, cleansed of organic and other coating, matte or whiteness, paintability and others.

Il est possible de traiter d'importantes surfaces (10) en déplaçant magnétiquement un arc électrique (14) de manière sensiblement continue le long d'une boucle circulaire, elliptique ou ovale et en déplaçant la surface de façon à ce que l'arc (14) couvre une surface importante. L'opération peut servir à nettoyer ou à rendre rugueuse la surface (10) et on peut amener dans la zone de contact de l'arc (14) un réactif ou un agent de traitement (140) pour modifier la surface (130) traitée par l'arc. Les traitements auxiliaires de la surface peuvent précéder et/ou suivre le traitement par l'arc. Le procédé produit des effets très recherchés tels qu'une faible rugosité ou un aspect mat convenant pour des applications très délicates telles que des plaques lithographiques d'aluminium. On peut également obtenir d'autres effets superficiels tels que capillarité, adhérence, pouvoir émissif uniforme, oxydation stable, revêtements organiques ou autres lavés, surface mate, blanche ou prête pour la peinture, etc.

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