Composition and method for stannate plating of large aluminum pa

Chemistry: electrical and wave energy – Processes and products

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106 125, 204 33, C25D 510, C25D 544, C23C 302

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active

041927222

ABSTRACT:
A composition and method for deoxidation or "activation" treatment of aluminum according to the stannate process in an alkaline tin solution, for either immersion or electrolytic plating of aluminum with tin, that provides an adherent tin layer and extends the allocable elapsed transfer time, between the activation bath and bronze strike bath, from the 20 seconds of the prior art to up to 2 minutes or more, whereby the stannate method for depositing tin on heavy parts such as aluminum automobile bumpers is commercially practicable for automatic plating of certain aluminum alloys such as alloy 7029.

REFERENCES:
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An Introduction to Sequestrene and Chelating Agents, Dyestuffs & Chemicals Divs., Ciba-Geigy Corp.
S. Wernick, et al., Surface Treatment and Finishing of Aluminum and Its Alloys, 1956, pp. 464-469.
Handbook of Chemistry and Physics, Chemical Rubber Pub Co., 1962, pp. 1476-1489.
Technical Data Sheet P-Sn-80, M&T Chemicals Inc., New York, N.Y.
Tentative Technical Data Sheet, Alstan XP-231, M & T Chemicals, Inc. New York, N.Y.

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