JPS6136593B

PURPOSE:To form the layer of an electrode having low oxygen overvoltage at a low cost, by coating a Pt plating layer formed on an ion-exchange membrane with an Ir plating layer formed by reducing an Ir compound with hydrazine. CONSTITUTION:A Pt plating layer is formed on an ion-exchange membrane by...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	KAMINO YASUYOSHI, NAGAYA KIICHI, NAKA YUKIHIKO
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS THEREFOR CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL ELECTROLYTIC OR ELECTROPHORETIC PROCESSES ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTIONOF COMPOUNDS OR NON-METALS INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL METALLURGY SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	PURPOSE:To form the layer of an electrode having low oxygen overvoltage at a low cost, by coating a Pt plating layer formed on an ion-exchange membrane with an Ir plating layer formed by reducing an Ir compound with hydrazine. CONSTITUTION:A Pt plating layer is formed on an ion-exchange membrane by a chemical plating method using a Pt compound (e.g. chloroplatinic acid). Thereafter, an Ir plating layer for coating said Pt plating layer is formed to form an electrode in the ion-exchange membrane. The formation of said Ir plating layer is performed by holding a plating liquid containing an Ir compound (e.g. IrCl4) and hydrazine and being adjusted to a pH 5-6 at one surface of the ion-exchange membrane, and letting an alkali solution penetrate into said membrane from the other surface. As a result, the reducing reaction with hydrazine in the presence of the penetrating alkali is brought out on the former surface of said membrane, so that the electrode, esp. an anode, comprising the Pt plating layer and the Ir plating layer for coating it is formed.