Process for the chemical conversion of metallic substrates,...

Details Process for the chemical conversion of metallic substrates,... Process for the chemical conversion of metallic substrates,...

C - Chemistry, Metallurgy

23

C

148/17

C23C 22/13 (2006.01) C23C 22/17 (2006.01) C23C 22/18 (2006.01) C23C 22/47 (2006.01)

Patent

CA 2030126

Process for the chemical conversion of metallic substrates comprising the use, at the moment of the phosphatization step proper, of a zinc conversion bath comprising phosphate ions and nitrate ions as well as ferrous or ferric ions and from about 21 to about 100 g/l of at least one organic chelating agent.

Méthode pour la conversion chimique de substrats métalliques, faisant appel, au moment de l'étape de phosphatation, à un bain de conversion de zinc, renfermant des ions phosphate et nitrate ainsi que des ions ferreux ou ferriques, et environ 21-100 g/l d'au moins un chélateur organique.

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