METHOD FOR PREVENTING CORROSION OF METAL

PURPOSE:To efficiently prevent the corrosion of a metal in a system in which the metal is kept in contact with water, especially in a system in which water is passed through a copper pipe and to make this method fit for a system using a heat transfer tube for a heat exchanger made of a copper pipe,...

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Bibliographische Detailangaben
Hauptverfasser:	TSUNEKI TAKAO, HIRANO SHOEI, ENDO YOSHIHIKO
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL METALLURGY MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLICMATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASSC23 AND AT LEAST ONEPROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25 NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE
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Beschreibung
Zusammenfassung:	PURPOSE:To efficiently prevent the corrosion of a metal in a system in which the metal is kept in contact with water, especially in a system in which water is passed through a copper pipe and to make this method fit for a system using a heat transfer tube for a heat exchanger made of a copper pipe, copper piping for hot water supply or a copper pipe for an air conditioner. CONSTITUTION:In order to prevent the corrosion of a metal in a system in which the metal is kept in contact with water, the natural potential of the metal is monitored and a corrosion inhibitor is added to the system so that the potential is reduced to below pitting corrosion potential.