Rubber article having a reinforcement made from cables to be protected against corrosion

摘要

A rubber product (1) is reinforced by wires (3) in two or more layers (4,5). One or more of the filaments (4a) of the inner layer (4) are made of a metal alloy and are protected against corrosion by a layer (7) containing a conductive polymer. The filaments (5a) of the outer layer (5) are embedded in the rubber matrix, and are protected by conventional methods, e.g. by brass plating. Also claimed is a process for applying the conductive polymer onto a metal surface, in which a dispersion is made, and the metal object is immersed several times with drying periods between. The process is carried out under pressure at not less than 4 bar.