Abstract
Mainly due to the relative low prize of Ru its electrodeposition has been investigated extensively. Nevertheless up to now electrodeposited Ru has found only limited industrial application [1, 2, 3]. From extensive investigations on the electrodeposition of Ru from aqueous electrolytes based on solutions of simple Ru salts and nitrosyl derivatives, the sulphamate solution developed as the most promising for practical uses [4]. During this work the following electrolytes have been examined: Ru nitrosylchloride in a) acid chloride solution and b) acid sulphate solution; Ru nitrosyl-sulphate; RuIV nitrosylsulphate; Ru sulphate; Ru phosphate; Ru nitrosylsulphamate; Ru sulphamate; Na tetranitro-nitrosylruthenate in a) aqueous solution, b) acid sulphate or phosphate solution and c) as solution obtained by reaction with sulphamic acid; ammonium nitrosylpentachlororuthenate in a) aqueous solution, b) acid sulphate, phosphate or ammoniacal solutions and c) as solutions in sulphamic acid. In the paper details of the preparation of these electrolytes have been listed [4].
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