Title:
PRODUCTION METHOD OF PIPING, AND OXIDE FILM FORMATION METHOD ON COPPER TUBE INNER SURFACE
Document Type and Number:
Japanese Patent JP2018053333
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To form a copper oxide film working as a protective film for suppressing corrosion, by a simple method, on the inner surface of a copper tube constituting water piping.SOLUTION: A chloride ion-containing aqueous solution L2 is injected and filled into a copper tube 11, to thereby form a copper oxide film 12 on the inner surface of the copper tube 11, and to produce water piping 10.SELECTED DRAWING: Figure 3B
Inventors:
SHIBATA YUTAKA
Application Number:
JP2016192885A
Publication Date:
April 05, 2018
Filing Date:
September 30, 2016
Export Citation:
Assignee:
DAIKIN IND LTD
International Classes:
C23C22/68; F28F19/00
Domestic Patent References:
| JP2009270175A | 2009-11-19 | |||
| JP2002371374A | 2002-12-26 | |||
| JP2002256446A | 2002-09-11 | |||
| JP2003239085A | 2003-08-27 | |||
| JPS59118888A | 1984-07-09 | |||
| JPS60200973A | 1985-10-11 | |||
| JP2013204148A | 2013-10-07 | |||
| JP2005329380A | 2005-12-02 | |||
| JPH06184673A | 1994-07-05 |
Foreign References:
| WO2015150448A1 | 2015-10-08 |
Attorney, Agent or Firm:
Maeda patent office
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