Iron-phosphorus electroplating bath and method

Details Iron-phosphorus electroplating bath and method Iron-phosphorus electroplating bath and method

2004-03-01

2009-02-24

Wong, Edna (Department: 1795)

Electrolysis: processes, compositions used therein, and methods

Electrolytic coating

Depositing predominantly alloy coating

C205S259000, C106S001270

Reexamination Certificate

active

07494578

ABSTRACT:
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.

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Wang et al; Materials Transactions; Relationship between the Crystallographic Structure of Electrodeposited Fe-P Alloy Film and its Thermal Equilibrium Phase Diagram; vol. 44, No. 1 (2003) pp. 127-132. no month.
International Search Report and Written Opinion; Application No. PCT/US2005/000791; mailed Feb. 21, 2006.

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