Method of producing layers of lead and its alloys on workpieces

Details Method of producing layers of lead and its alloys on workpieces Method of producing layers of lead and its alloys on workpieces

1976-08-09

1978-01-24

Kendall, Ralph S.

Coating processes

Applying superposed diverse coating or coating a coated base

Metal coating

427431, 427433, 428645, 428653, 428643, 428644, C23C 106, C23C 108

Patent

active

040705110

ABSTRACT:
A method of producing layers of lead and its alloys on workpieces made of ferrous alloys comprising dipping the workpieces to be coated into a two-layer bath, the upper layer of which is a bath of aluminum or its alloys, and the bottom layer of which is a bath of lead or its alloys. The workpieces are then taken out of the deeper layer of the bath of lead and its alloys by pulling them through the upper layer of the bath of aluminum and its alloys, or by pulling the workpieces through the bath of metal, provided in a vessel connected with the bottom layer of the bath.
The temperature of both baths, the upper bath and of the bath in the vessel connected with the bottom bath, is maintained within the range of 150.degree. C to 900.degree. C. The temperatures of the bath of the upper layer, of the bath of the bottom layer, and of the bath in the vessel connected with the bath of the bottom layer are equal or differ from each other by 50.degree. C to 750.degree. C.

REFERENCES:
patent: 1151629 (1915-08-01), Turnbull
patent: 2428523 (1947-10-01), Marshall
patent: 2615768 (1952-10-01), Schluchter

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