Electrode characterized by highly adhering superficial catalytic layer
AssigneeDe Nora Elettrodi S.p.A.
InventorsRuben Ornelas Jacobo, Giuseppe Faita, Lawrence Gestaut, Corrado Mojana
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Abstract
The invention is relative to an electrode for gas evolution in electrolytic and electrometallurgical industrial applications, made of a metal substrate having a surface morphology characterised by a combination of micro-roughness and macro-roughness which favours high adherence of a superficial catalytic layer in order to prevent detachment of the same and passivation of the substrate even under critical operating conditions.
Claims23
Electrode for gas evolution, which comprises a metal substrate with a surface profile resulting from the combination of a macro-rough profile and a micro-rough profile, and an electrocatalytic coating applied to said metal substrate.
Method for the production of an electrode of the preceding claims characterised in that said macro-rough profile is obtained by means of at least one process selected between:
- a) sandblasting and
- b) preliminary acid etching, and the micro-rough profile is obtained by a final acid etching.
Dependencies are inferred from the claim text.