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Definition of "immersion deposition"?

I am reading through a technical journal which states that if copper sulphate ⇦ this on eBay or Amazon [affil links] is used to plate copper on zinc, an "immersion deposition of copper" would occur which is a semi-adherent bond. The article continues by stating that this would not occur if using copper cyanide. Could someone please define the terms "immersion deposition" and "displacement deposit" please?

Thank you,

Mary Ross
- Oklahoma City, Oklahoma
2001

See letter 96 para 4 by Tom Pullizzi. This is a simple way of explaining a complex thing.

Martin Trigg-Hogarth
surface treatment shop - Stroud, Glos, England
2001

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