Method for applying a metal layer to a light metal surface

Details Method for applying a metal layer to a light metal surface Method for applying a metal layer to a light metal surface

2006-11-21

2006-11-21

Wong, Edna (Department: 1753)

Electrolysis: processes, compositions used therein, and methods

Electrolytic coating

Depositing predominantly alloy coating

C205S256000, C205S258000, C205S270000

Reexamination Certificate

active

07138043

ABSTRACT:
A process for applying a metal layer to surfaces of light metals is proposed, in which iron is electrolytically deposited on the surfaces from a deposition bath containing Fe(II) compounds using dimensionally stable anodes insoluble in the deposition bath. The process is especially suitable for coating cylinder faces of internal combustion engines and of rotationally symmetrical parts with layers having very high wear resistance, especially of valves, nozzles and other parts of high-pressure injection systems for motor vehicle engines. In addition, the present invention pertains to nanocrystalline iron-phosphorus layers, which can be formed preferably by depositing iron in the presence of compounds containing orthophosphite and/or hypophosphite. These layers also have good corrosion resistance besides the good wear resistance.

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Horn, “Pulse Plating”, Dynatronix, Aug. 5, 1999, pp. 1-13.

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