Metallizing pretreatment of zinc surfaces

Details Metallizing pretreatment of zinc surfaces Metallizing pretreatment of zinc surfaces

C - Chemistry, Metallurgy

23

C

C23C 18/54 (2006.01) C23C 28/00 (2006.01)

Patent

CA 2686380

The invention relates to a method for a preliminary metallizing treatment of galvanized or zinc alloy-coated steel surfaces or joined metallic parts that at least partly have zinc surfaces, in a surface treatment encompassing several process steps. In the disclosed method, metallic coats of especially a maximum of 100 mg/m2 of molybdenum, tungsten, cobalt, nickel, lead, tin, and/or preferably iron are produced on the treated zinc surfaces. Another embodiment of the invention relates to an uncoated or subsequently coated metallic part which has been subjected to the disclosed preliminary metallizing treatment as well as the use of such a part for making bodies during the production of automobiles, building ships, in the construction industry, and for manufacturing white products.

La présente invention concerne un procédé de prétraitement de métallisation de surfaces d'acier galvanisées et/ou galvanisées par alliage ou de composants métalliques assemblés qui présentent au moins partiellement des surfaces de zinc, au cours d'un traitement de surface comprenant plusieurs étapes de processus. Selon ce procédé, des couches métalliques comprenant en particulier pas plus de 100 mg/m2 de molybdène, de tungstène, de cobalt, de nickel, de plomb, d'étain et/ou de préférence de fer sont appliquées sur les surfaces de zinc traitées. Un autre aspect de l'invention concerne un composant métallique, non revêtu ou revêtu ultérieurement, auquel le prétraitement de métallisation selon l'invention a été conféré, ainsi que l'utilisation d'un tel composant dans la fabrication de carrosseries pour la construction automobile, dans la construction navale, dans l'industrie du bâtiment et dans la fabrication de gros appareils électroménagers.

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