Title:
METHOD FOR INHIBITING CORROSION IN CLOSED-CIRCULATION-TYPE COOLING WATER SYSTEM
Document Type and Number:
WIPO Patent Application WO/2014/119788
Kind Code:
A1
Abstract:
Provided is a corrosion inhibition method, whereby, in a closed-circulation-type cooling water system equipped with a facility made from an iron material and a copper material, it becomes possible to achieve an excellent corrosion-inhibiting effect on both of the materials.
In a closed-circulation-type cooling water system equipped with a facility made from an iron material and a copper material, at least one component selected from nitrous acid, molybdic acid, tungstic acid and alkaline salts thereof is added to the water system, and an alkali metal bicarbonate is also added to the water system so that the pH value of the closed-circulation-type cooling water system can become 7.0 to 9.5.
Inventors:
TERAMOTO TETSUYA (JP)
KIKKAWA TAKASHI (JP)
KIKKAWA TAKASHI (JP)
Application Number:
PCT/JP2014/052470
Publication Date:
August 07, 2014
Filing Date:
February 03, 2014
Export Citation:
Assignee:
KURITA WATER IND LTD (JP)
International Classes:
C23F11/18
Foreign References:
| JP2004211137A | 2004-07-29 | |||
| JPH10195681A | 1998-07-28 | |||
| JPH04166298A | 1992-06-12 |
Attorney, Agent or Firm:
OHTANI, Tamotsu et al. (JP)
Tamotsu Otani (JP)
Tamotsu Otani (JP)
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