Method of making a plain bearing sliding layer

Details Method of making a plain bearing sliding layer Method of making a plain bearing sliding layer

1989-11-01

1992-10-20

Niebling, John

Electrolysis: processes, compositions used therein, and methods

Electrolytic coating

Depositing predominantly single metal or alloy coating on...

205149, 205176, 205241, C25D 358, C25D 518, C25D 710

Patent

active

051567296

ABSTRACT:
A method of making a plain bearing sliding layer for use in internal combustion engines, comprising the immersion of a metal substrate in a chemical solution containing copper, tin and lead salts to which is added one of the compounds represented by the following three exemplary structures: ##STR1## where X is one of the chemical elements selected from sulphur and nitrogen, --C represents one carbon atom, and radicals R.sub.1 and R.sub.2 represent the allowed variations, from a single hydrogen atom up to the typical structures of inorganic compounds or aliphatic, aromatic or cyclic chain organic radicals. The chemical solution is subjected to an electric current with a density and potential controlled as a function of time, thereby effecting the selective electrodeposition of the solution elements on the substrate so as to form successive and alternate layers of softer material and harder material. Each of the layers of softer metal is a Cu-Sn-Pb alloy layer and each of the layers of harder material is a pure copper or a Cu-Su alloy layer.

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Dennis Tench et al., Enhanced Tensile Strength for Electrodeposited Nickel-Copper Multilayer Composites, Metallurgical Transactions A, vol. 15A, Nov. 1984, pp. 2039-2040.
Joseph Yahalom et al., Formation of Composition-Modulated Alloys by Electrodeposition, Journal of Materials Science 2 (1987), pp. 499-503.
Abner Brenner, Electrodeposition of Alloys, vol. II, Academic Press, New York, 1963, p. 26.
A. Kenneth Graham, Electroplating Engineering Handbook, second edition, Reinhold Publishing Corp., New York, 1962, p. 55.

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