6. Surface preparation
The essential condition for the success of an electrolytic coating is to apply the coating to a clean surface.
-
Three types of pollution should be considered:
particles;
organic contaminants (fats, amino acids, etc.);
oxides.
-
The particles are removed by immersing the substrate in an ultrasonic bath for several tens of seconds to several minutes, often consisting of a chemical degreaser, but also during electrolytic degreasing.
The ultrasound frequency will be carefully selected based on the size and complexity of the substrate, as well as its fragility.
Organic contaminants...
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Surface preparation
Post-processing
Bibliography
Standards and norms
- MIL Rhodium plating, electrodeposited. - MIL-R-46085A - 1984
Regulations
General Tax Code, Title III, Chapter II, Section VII, Article 551.
Decree of July 18, 2000, prohibiting the marketing of certain products containing nickel (Consolidated version as of April 25, 2009).
Patents
J.W. Chevalier, M.D. Gernon, P.K. Janney Precious Metal Deposition Composition and Process USP6251249, 2001.
G.D. Fatzer Method for Plating Palladium USP3150065, 1964.
H. C. Angus, J.M. Stevens Electrodeposition of Palladium USP3544435, 1970.
A.R. Powell, E.C. Davies Electrodeposition of Palladium USP1921941, 1933.
F. Zuntini, J.M....
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