PROTECTIVE CORROSION TREATMENT OF COPPER AND COPPER ALLOY AND FIN AND TUBE TYPE HEAT EXCHANGER USING COPPER TUBE OR COPPER ALLY TUBE SUBJECTED TO THE PROTECTIVE CORROSION TREATMENT

PROBLEM TO BE SOLVED: To provide a protective corrosion treatment method of copper and copper alloy capable of reducing a production cost and a fin and tube type heat exchanger which uses a copper tube or copper alloy tube subjected to the protective corrosion treatment and has excellent corrosion r...

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Hauptverfasser:	KAWARAI HISAKATSU, NISHIMORI TADAO
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS THEREFOR BLASTING CHEMISTRY DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OFGENERAL APPLICATION ELECTROFORMING ELECTROLYTIC OR ELECTROPHORETIC PROCESSES HEAT EXCHANGE IN GENERAL HEATING LIGHTING MECHANICAL ENGINEERING METALLURGY PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS WEAPONS
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creator	KAWARAI HISAKATSU NISHIMORI TADAO
description	PROBLEM TO BE SOLVED: To provide a protective corrosion treatment method of copper and copper alloy capable of reducing a production cost and a fin and tube type heat exchanger which uses a copper tube or copper alloy tube subjected to the protective corrosion treatment and has excellent corrosion resistance. SOLUTION: The protective corrosion treatment method of copper consists in subjecting the inside surface of the copper tube 1 to negative polarization in an alkaline aqueous solution having a pH ranging from 9 to 12, then forming an oxidized film on the inside surface of the copper tube 1 by positive polarization. The positive polarization and the negative polarization are effected by inserting a polyvinyl chloride tube 3 which has a through-hole and is inserted with a counter electrode 2 into the copper tube 1 and impressing voltage to the counter electrode 2 and the copper tube 1.
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SOLUTION: The protective corrosion treatment method of copper consists in subjecting the inside surface of the copper tube 1 to negative polarization in an alkaline aqueous solution having a pH ranging from 9 to 12, then forming an oxidized film on the inside surface of the copper tube 1 by positive polarization. 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SOLUTION: The protective corrosion treatment method of copper consists in subjecting the inside surface of the copper tube 1 to negative polarization in an alkaline aqueous solution having a pH ranging from 9 to 12, then forming an oxidized film on the inside surface of the copper tube 1 by positive polarization. The positive polarization and the negative polarization are effected by inserting a polyvinyl chloride tube 3 which has a through-hole and is inserted with a counter electrode 2 into the copper tube 1 and impressing voltage to the counter electrode 2 and the copper tube 1.</abstract><edition>7</edition><oa>free_for_read</oa></addata></record>
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subjects	APPARATUS THEREFOR BLASTING CHEMISTRY DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OFGENERAL APPLICATION ELECTROFORMING ELECTROLYTIC OR ELECTROPHORETIC PROCESSES HEAT EXCHANGE IN GENERAL HEATING LIGHTING MECHANICAL ENGINEERING METALLURGY PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS WEAPONS
title	PROTECTIVE CORROSION TREATMENT OF COPPER AND COPPER ALLOY AND FIN AND TUBE TYPE HEAT EXCHANGER USING COPPER TUBE OR COPPER ALLY TUBE SUBJECTED TO THE PROTECTIVE CORROSION TREATMENT
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