Electrochemically textured surface having controlled peak...

C - Chemistry – Metallurgy – 25 – D

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C25D 5/18 (2006.01) C25D 3/04 (2006.01) C25D 5/16 (2006.01)

Patent

CA 2450283

Textured surfaces comprised of peaks which have been electrochemically deposited on a substrate are prepared using a pulsed direct current process. Typical substrates are machine components such as a machine roll. Improved textured surfaces are made according to the invention by controlling the density, uniformity and size of the peaks using a pulsed direct current process. Accordingly, the peak characteristics are predetermined by selecting a pulse wave form having specific current density and pulse interval parameters as well as a total deposition time which will deposit peaks having desired characteristics on the substrate.

La présente invention concerne des surfaces texturées qui comprennent des rugosités déposées de façon électrochimique sur un substrat et qui sont préparées par un processus de courant direct pulsé. Les substrats représentatifs sont des éléments de machine tels que des rouleaux de machine. On fabrique selon cette invention des surfaces texturées améliorées en commandant la densité, l'uniformité et la taille des rugosités par un processus de courant direct pulsé. Ainsi, on prédétermine les caractéristiques de rugosité en sélectionnant une forme d'impulsion possédant une densité de courant spécifique et des paramètres d'intervalle d'impulsion ainsi qu'un temps de dépôt total durant lequel des rugosités aux caractéristiques recherchées seront déposées sur le substrat.

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