| 摘要 |
PROBLEM TO BE SOLVED: To provide an additive for engine cooling water preventing a deterioration of a rust-preventive agent in engine cooling water by a far infrared radiation effect and inducing a rust-preventive effect an undiluted solution for engine cooling water, and engine cooling water. SOLUTION: This engine cooling water uses as engine cooling water, activated water to which nonfreezing ethylene glycol and rocks with a mean particle diameter crushed to 10μm or below irradiated with far infrared ray are applied. Thereby, water is electrolyzed into H<SP>+</SP>ions and OH<SP>-</SP>ions by a momentary reaction between rocks and water, a hydrogen ion film is formed on the surface of a pipe wall by the activated H<SP>+</SP>ions, contact with corrosive gas such as dissolved oxygen and residual chlorine in water can be prevented, and oxidation corrosion can be prevented. COPYRIGHT: (C)2005,JPO&NCIPI
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