Method and device for applying porous coatings and cathode film of an electrolytic condenser

摘要

A porous layer of titanium is deposited onto an aluminium base by vacuum deposition as the film is moved continuously. An additional layer of titanium nitride is then formed in a nitrogen or ammonia atmosphere. The technical result is a cathode film with the most developed possible surface, high corrosion resistance in electrolytes and low electrical resistance at the cathode-electrolyte junction. The device for applying porous surfaces on a strip by vacuum deposition comprises a vacuum chamber, a vaporizer, upper and lower guide rollers and deflecting rollers for conveying the strip. The technical result is the formation on a wide (i.e. more than 150 mm) strip of a columnar structure in the coating with maximum porosity without fold formation on the strip. This result is achieved as a result of the configuration of the working sections, the angle of incidence of the vapour stream on the film being 40-60 DEG while the angle of incidence at the inlet and outlet from the deposition area is 0-10 DEG , herringbone-like grooves being provided on the cylindrical surfaces of the guide rollers.