C - Chemistry – Metallurgy – 25 – D
Patent
C - Chemistry, Metallurgy
25
D
C25D 3/56 (2006.01)
Patent
CA 2558466
In one embodiment, this invention relates to an aqueous acid iron phosphorus bath which comprises (A) at least one compound from which iron can be electrolytically deposited, (B) hypophosphite ion, and (C) a sulfur-containing compound selected from sulfoalkylated polyethylene imines, sulfonated safranin dye, and mercapto aliphatic sulfonic acids or alkali metal salts thereof. Optionally, the aqueous acidic iron phosphorus electroplating bath of the invention also may comprise aluminum irons. The alloys which are deposited on the substrates by the process of the present invention are characterized by the presence of iron, phosphorus and sulfur.
Dans un mode de réalisation, cette invention concerne un bain fer-phosphore acide aqueux contenant (A) au moins un composé grâce auquel le fer peut être déposé par électrolyse, (B) un ion hypophosphite, et (C) un composé contenant du soufre choisi dans imines de polyéthylène sulfoalkylé, teinture de safranine sulfonée, et acides aliphatiques de mercapto ou des sels métalliques alcalins de ceux-ci. Facultativement, le bain électrolytique fer-phosphore acide aqueux de l'invention contient des fers d'aluminium. Les alliages qui sont déposés sur les substrats au moyen de ce procédé se caractérisent par la présence de fer, de phosphore et de soufre.
Fels Carl Christian
Jones Allen R.
Kamiya Shoichi
Atotech Deutschland Gmbh
Gowling Lafleur Henderson Llp
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