METHOD AND COMPOSITION FOR PRODUCING BRIGHT PALLADIUM ELECTRODEPOSITIONS

A composition for producing adherent deposits of palladium from cyanide-free bath uses small amounts of cobalt or nickel or the combination thereof as the brightener. The bath employs as an electrolyte alkali metal and ammoni-um sulfates, sulfamates, phosphates, nitrates, nitrites and mixtures there...

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Hauptverfasser:	ZOBBI, ROBERT G, SKOMOROSKI, ROBERT M
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS THEREFOR CHEMISTRY ELECTROFORMING ELECTROLYTIC OR ELECTROPHORETIC PROCESSES METALLURGY PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS
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creator	ZOBBI ROBERT G SKOMOROSKI ROBERT M
description	A composition for producing adherent deposits of palladium from cyanide-free bath uses small amounts of cobalt or nickel or the combination thereof as the brightener. The bath employs as an electrolyte alkali metal and ammoni-um sulfates, sulfamates, phosphates, nitrates, nitrites and mixtures thereof. Preferably, the brightener concentration is 0.004-0.02 gram mole per liter nickel or 0.002-0.04 gram mole per liter cobalt, or the combination thereof. Cetyltrimethylammonium bromide is an optional component for the bath which is maintained at a pH of 7.5-11.0 and at a temperature of 28.degree.-80.degree. Centigrade. For barrel plating, the current density is 0.05-0.5 amperes per square decimeterand for rack plating the current density is 0.2-2.0 amperes per square decimeter.
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The bath employs as an electrolyte alkali metal and ammoni-um sulfates, sulfamates, phosphates, nitrates, nitrites and mixtures thereof. Preferably, the brightener concentration is 0.004-0.02 gram mole per liter nickel or 0.002-0.04 gram mole per liter cobalt, or the combination thereof. Cetyltrimethylammonium bromide is an optional component for the bath which is maintained at a pH of 7.5-11.0 and at a temperature of 28.degree.-80.degree. Centigrade. 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The bath employs as an electrolyte alkali metal and ammoni-um sulfates, sulfamates, phosphates, nitrates, nitrites and mixtures thereof. Preferably, the brightener concentration is 0.004-0.02 gram mole per liter nickel or 0.002-0.04 gram mole per liter cobalt, or the combination thereof. Cetyltrimethylammonium bromide is an optional component for the bath which is maintained at a pH of 7.5-11.0 and at a temperature of 28.degree.-80.degree. Centigrade. 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The bath employs as an electrolyte alkali metal and ammoni-um sulfates, sulfamates, phosphates, nitrates, nitrites and mixtures thereof. Preferably, the brightener concentration is 0.004-0.02 gram mole per liter nickel or 0.002-0.04 gram mole per liter cobalt, or the combination thereof. Cetyltrimethylammonium bromide is an optional component for the bath which is maintained at a pH of 7.5-11.0 and at a temperature of 28.degree.-80.degree. Centigrade. For barrel plating, the current density is 0.05-0.5 amperes per square decimeterand for rack plating the current density is 0.2-2.0 amperes per square decimeter.</abstract><oa>free_for_read</oa></addata></record>
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subjects	APPARATUS THEREFOR CHEMISTRY ELECTROFORMING ELECTROLYTIC OR ELECTROPHORETIC PROCESSES METALLURGY PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS
title	METHOD AND COMPOSITION FOR PRODUCING BRIGHT PALLADIUM ELECTRODEPOSITIONS
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