CORROSION INHIBITOR INJECTION METHOD

Title:

CORROSION INHIBITOR INJECTION METHOD

Document Type and Number:

WIPO Patent Application WO/2013/039163

Kind Code:

A1

Abstract:

A corrosion inhibitor injection method for injecting an oxidant and an anti-corrosive agent-pH adjustment agent composite body comprising an anti-corrosive agent and a pH adjustment agent adsorbed to the surface of the anti-corrosive agent into high-temperature water contacting a surface of a metal structural material, and irradiating the high-temperature water with radiation or ultraviolet rays, wherein the anti-corrosive agent of the anti-corrosive agent-pH adjustment agent composite body has an active spot on the surface which reacts with the pH adjustment agent and the oxidant, and the pH adjustment agent existing on the surface of the anti-corrosive agent of the anti-corrosive agent-pH adjustment agent composite body and/or in the high-temperature water is oxidized by the oxidant through irradiation with radiation or ultraviolet rays, the pH adjustment force of the pH adjustment agent is changed, and adhesion of the anti-corrosive agent (11) to the metal structural material (65) is accelerated by shifting the high-temperature water pH to the neutral side.

Inventors:

OKAMURA MASATO
OOSATO TETSUO
MURAKAMI KAZUO
YAMAMOTO SEIJI
ARAI HIROYUKI
URATA HIDEHIRO
HIRASAWA HAJIME
SHIBASAKI OSAMU
NEGISHI KOJI

Application Number:

PCT/JP2012/073503

Publication Date:

March 21, 2013

Filing Date:

September 13, 2012

Export Citation:

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Assignee:

TOSHIBA KK (JP)
OKAMURA MASATO
OOSATO TETSUO
MURAKAMI KAZUO
YAMAMOTO SEIJI
ARAI HIROYUKI
URATA HIDEHIRO
HIRASAWA HAJIME
SHIBASAKI OSAMU
NEGISHI KOJI

International Classes:

C23F11/18; G21C19/02; G21D1/00; G21D3/08

Foreign References:

JP2011163828A	2011-08-25
JP2003232886A	2003-08-22
JP2008007851A	2008-01-17
JP2624906B2	1997-06-25
JP4094275B2	2008-06-04
JP4043647B2	2008-02-06
JP2005003536A	2005-01-06
JP2006153607A	2006-06-15

Other References: