A METHOD FOR ELECTROPLATING WITH A REFRACTORY METAL

The invention relates to electroplating with refractory metal, mainly tantalum and niobium, from molten salts and can be applied in chemical, metallurgical, pharmaceutical, medicinal industries, turbine manufacture, air- and spacecraft, and other areas of engineering, in creation of corrosion-resist...

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Hauptverfasser:	POLIAKOV, EVGUENI GEORGIEVICH, POLIAKOVA, LARISSA, PETROVNA, MASLOV, VALERI, PETROVICH, KOVALEVSKI, VLADIMIR, PAVLOVICH
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	APPARATUS THEREFOR CHEMISTRY ELECTROFORMING ELECTROLYTIC OR ELECTROPHORETIC PROCESSES METALLURGY PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS
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Beschreibung
Zusammenfassung:	The invention relates to electroplating with refractory metal, mainly tantalum and niobium, from molten salts and can be applied in chemical, metallurgical, pharmaceutical, medicinal industries, turbine manufacture, air- and spacecraft, and other areas of engineering, in creation of corrosion-resistant and barrier coatings. The essence of the invention is that when the article to be coated is immersed into a molten electrolyte containing fluorides of both refractory and alkali metal and a eutectic melt of sodium, potassium and cesium chlorides, the article is warmed up to the working temperature of the electrolyte of 700-770 DEG C whereupon direct or reverse electric current is passed through the electrolyte, the current parameters being adjusted so that quantity of electricity in the anodic Qa, and cathodic Qc, parts of the electroplating cycle corresponds to the ratio O