Permelec Electrode Ltd.

Toshiki Goto

Takayuki Shimamune

Hiroshi Asano

Masashi Hosonuma

Hideo Nitta

Hideo Sato

Hisoshi Asano

A cathode for electrolyzing acid solutions which comprises an electrically conductive metal substrate, a spray coated layer of a cathode active material containing tungsten, tungsten carbide or a mixture thereof in an amount of 10% by weight or more on the substrate, and an impregnation coated layer of 1 g/m.sup.2 or more of an acid-resistant fluorine containing resin on the outside surface of the coated layer of cathode active material, and a process for producing such.

Cathode for electrolyzing acid solutions and process for producing the

An electrolysis apparatus comprising a diaphragm of a solid polymer electrolyte, and an anode electrode structure and a cathode electrode structure located on both sides of the diaphragm, at least one of the electrode structures intimately contacting the surface of said diaphragm, the intimately contacting electrode structure comprising a gas-permeable electrically conductive substrate and a film-like porous electrode catalyst layer bonded integrally thereto and a method for producing such.

Electrolysis apparatus using a diaphragm of a solid polymer electrolyte,

A cathode for use in the electrolysis of acid solutions, comprising

Cathode for electrolysis of acid solution and process for the production

Electrolysis apparatus using a diaphragm of a solid polymer electrolyte

A method for forming an anticorrosive coating on the surface of a metal substrate, which comprises, in one embodiment, (1) coating the surface of the metal substrate with an anticorrosive metal capable of forming an alloy with the substrate metal and/or a hydride of the anticorrosive metal; (2) heating the coated surface, and then; (3) heating the coated surface in a vacuum or in an atmosphere substantially inert to the metal coating and the metal substrate by irradiating the coated surface with electron beams, laser beams or a plasma arc to sinter the coated metal and form an alloy layer in the interface between the metal substrate and the metal coating and, in another embodiment, subsequent to Step (2) and prior Step (3) above, coating the coated surface with a solution of a thermally decomposable platinum-group metal compound and then heating the resulting coated surface at about 40.degree. C. to about 600.degree. C.

Method for forming an anticorrosive coating on a metal substrate

A method for forming an anticorrosive coating on the surface of a metal substrate, which comprises, in one embodiment, (1) coating the surface of the metal substrate with an anticorrosive metal capable of forming an alloy with the substrate metal using a spraying procedure, and (2) then heating the coated surface in a vacuum or in an atmosphere substantially inert to the metal coating and metal substrate by irradiating electron beams or a plasma arc thereonto to form an alloy layer in the interface between the metal substrate and the metal coating and, in a second embodiment, subsequent to step (1) and prior to step (2) above coating a solution of a thermally decomposable platinum-group metal compound on the surface of the resulting coating, and heat-treating the coated product at about 50.degree. to about 300.degree. C.

An alloy for use as a substrate of an electrode for use in electrolysis, the alloy comprising

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Kanagawa, Japan

Toshiki Goto