Title:
WATER SYSTEM STORAGE TREATMENT METHOD AND WATER SYSTEM PRETREATMENT METHOD
Document Type and Number:
WIPO Patent Application WO/2020/218204
Kind Code:
A1
Abstract:
Provided is a storage treatment method for water systems, comprising a step in which the water system is filled with storage water containing nitrous acid and/or a salt thereof. As a result of this storage treatment method, a pretreatment method for water systems is provided that is used after the storage treatment step in which a water system is stored and comprises: a flushing step in which, after the storage treatment step, the interior of the water system is flushed; a basic treatment step in which, after the flushing step, an anti-corrosion film is formed inside the water system; and a transition step in which, after the basic treatment step, the water in the water system is adjusted to a prescribed water quality.
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Inventors:
UCHIDA TAKAHIKO (SG)
LIM JIT MENG PATRICK (SG)
SASAKI KAORI (JP)
LIM JIT MENG PATRICK (SG)
SASAKI KAORI (JP)
Application Number:
PCT/JP2020/016910
Publication Date:
October 29, 2020
Filing Date:
April 17, 2020
Export Citation:
Assignee:
KURITA WATER IND LTD (JP)
International Classes:
C23F11/18
Domestic Patent References:
| WO2015141250A1 | 2015-09-24 |
Foreign References:
| JP2003064488A | 2003-03-05 | |||
| JPS492737A | 1974-01-11 | |||
| JPH03122401A | 1991-05-24 | |||
| JPS63125687A | 1988-05-28 | |||
| JPS56126480U | 1981-09-26 | |||
| US5558772A | 1996-09-24 |
Attorney, Agent or Firm:
SHIGENO, Tsuyoshi et al. (JP)
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