FORFARANDE FOR FRAMSTELLNING AV AKTIVA ANODER FOR ANVENDNING AVID ELEKTROKEMISK SPJELKNING AV VATTEN

Active anodes are produced which are used in electrochemical processes, in particular the electrolysis of water to produce hydrogen. In this method, the anodes are electroplated with nickel after a preceding cleaning and pretreatment before they are anodically activated in an electroplating bath containing a component which releases sulphur. The novel feature is that the anodes are activated in an electroplating bath which contains 10 - 300 g/l of nickel sulphate hydrate and thiosulphate in an amount equivalent to 10 - 200 g/l of sodium thiosulphate and in which the pH value is kept between 4.5 and 6 and the temperature at 30 - 50 DEG C, the activation being carried out for 3 to 5 hours using an anodic current density of 0.2 - 1 A/dm .