Title:
METAL CORROSION PROTECTION TREATMENT METHOD FOR WATER SYSTEM
Document Type and Number:
WIPO Patent Application WO/2023/067903
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing a technique for a metal corrosion protection treatment for a water system, whereby it becomes possible to achieve a satisfactory anticorrosive effect without using a phosphorus compound, which is a causative substance for eutrophication, as a metal anticorrosive agent and it also becomes possible to achieve a satisfactory anticorrosive effect in high-hardness water as well as low-hardness water. The present invention can provide: a metal corrosion protection treatment method for a water system, in which a component (A) and a component (B) as mentioned below are allowed to be present at a usage ratio of 1:9 to 7:3 by mass in the water system; and (A) a copolymer of a (meth)acrylic acid monomer and a sulfonic acid monomer, and (B) a maleic acid-based polymer in which the carboxyl group content is 11.5 mmol/g or more.
Inventors:
YOSHINO TAKANORI (JP)
KUMAGAI AYAKO (JP)
FUJITA KAZUHISA (JP)
SATO KENYA (JP)
WATANABE KAZUYA (JP)
XIA WEI (CN)
KUMAGAI AYAKO (JP)
FUJITA KAZUHISA (JP)
SATO KENYA (JP)
WATANABE KAZUYA (JP)
XIA WEI (CN)
Application Number:
PCT/JP2022/032714
Publication Date:
April 27, 2023
Filing Date:
August 31, 2022
Export Citation:
Assignee:
KURITA WATER IND LTD (JP)
International Classes:
C23F11/173
Domestic Patent References:
| WO2017006824A1 | 2017-01-12 |
Foreign References:
| JP2015063735A | 2015-04-09 | |||
| JP2010202893A | 2010-09-16 | |||
| JP2015183285A | 2015-10-22 | |||
| JP2012207279A | 2012-10-25 |
Attorney, Agent or Firm:
WATANABE Kaoru (JP)
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