Abstract: A process for dissolving metals, alloys or metallic compound materials in metal cyanamide and/or thiocyanate and/or cayanide and/or halide melts containing optionally metal carbonate and/or cyanide, characterized in that substances are added to the melt which form or liberate CN, and/or CNO and/or SCN radicals in the melt under the reaction conditions.

Abstract: Spark plug for internal combustion engines with center and ground electrodes consisting of base metals, base metal alloys, or metallic composite materials, said center electrode or both electrodes being coated at least on their ignition areas with a metal or metal alloy having an average atomic weight of more than 100 and a melting point above 1500.degree. C. The metal coating is deposited by crystalline growth on the electrode surface in a thickness of 5 to 100 microns, preferably 15 to 60 microns using the vapor deposition technique or molten salt electrolysis. The cap-shaped coating is applied to the frustro-conical ignition area of the center electrode.

Abstract: A process of electro-plating elongate articles of passive metal with a thin, homogeneous coating of a noble metal. The article is passed through an electrolyte bath comprising a salt melt of alkali metals or alkaline earth metals containing a cyano radical. The articles are guided through the bath by guides of a material selected from oxides of aluminum, silicon, yttrium, or zirconium; nitrides of silicon, borium, or titanium; or carbides of silicon or titanium. The entire process is carried out in an inert atmosphere.