Kabushiki Kaisha Toshiba

Ishikawajima-Harima Heavy Industries Co., Ltd.

The Tokyo Electric Power Company, Incorporated

Kazuo Murakami

Seiji Yamamoto

Kazuya Yamada

Masato Okamura

Tetsuo Oosato

Hideki Nakamura

Ryouta Takahashi

Haruhiko Takase

Noboru Jimbo

Hiroyuki Arai

Kenji Yamazaki

Osamu Shibasaki

Junichi Takagi

Nagayoshi Ichikawa

Hajime Hirasawa

Koji Negishi

Shunichi Suzuki

Tadasu Yotsuyanagi

Kenro Takamori

Hidehiro Urata

Mitsuru Sambongi

Yuichi Fukaya

Yukio Henmi

Takasi Hirano

A method for injecting a corrosion inhibitor injecting an oxidant and an anticorrosive agent-pH adjusting agent complex including an anticorrosive agent and a pH adjusting agent adsorbed on a surface of the anticorrosive agent into high temperature water in contact with a surface of a metal structural material and irradiating the high temperature water with a radioactive ray or an ultraviolet ray, wherein the anticorrosive agent of the anticorrosive agent-pH adjusting agent complex has, on the surface of the anticorrosive agent, an active site where the pH adjusting agent reacts with the oxidant, and the pH adjusting agent present on the surface of the anticorrosive agent of the anticorrosive agent-pH adjusting agent complex and/or in the high temperature water is oxidized with the oxidant by the irradiation with the radioactive ray or the ultraviolet ray to change pH adjusting ability of the pH adjusting agent and shift a pH of the high temperature water to a neutral side, and thereby deposition of the anticorrosive agentto the metal structural materialis accelerated.

Corrosion inhibitor injecting method

A hydrogen iodide manufacturing method which includes a step of producing aqueous solution of hydrogen iodide and sulfuric acid by causing iodine-containing aqueous solution and sulfur dioxide to react with each other in a pressurized condition. The pressurized condition may be of not lower than 0.1 MPa in gauge pressure. The method may further include: a separation step of adding iodine to the aqueous solution of hydrogen iodide and separating an upper phase containing sulfuric acid relatively to a large extent and a lower phase containing hydrogen iodide relatively to a large extent; and a step of producing hydrogen iodide by adding sulfur dioxide to the upper phase in a pressurized condition and extracting the produced hydrogen iodide to the lower phase.

Hydrogen iodide manufacturing method and hydrogen iodide manufacturing apparatus

In a method of reducing corrosion of a metal material, a substance such as semiconductor for generating an electric current by thermal excitation is coated or adhered on a metal material surface, to be exposed to a water having a high temperature of 150&#xb0; C. or more, of a boiler and ducts or pipes, to which hot water heated by the boiler contacts, of a thermal electric power plant or a nuclear reactor structural material or ducts or pipes surrounding the reactor in a nuclear power plant.

Method of reducing corrosion of metal material

Growing community of inventors

Kawasaki, Japan

Kazuo Murakami