Process for producing cleaning water and cleaning water

Abstract

The invention provides a higher rust preventive effect than alkaline water prepared by conventional electrolysis, and washing water compatible with safety and washing quality. In the method of preparing washing water, a process by which sulfate ions in raw water are made to be <=0.2 mmol / dm3 and / or chloride ions <=0.5 mmol / dm3, calcium ions <=1.0 mmol / dm3, and Mg ions <=1.0 mmol / dm3, is performed and subsequently a process by which sodium carbonate concentration in raw water is made to be 0.1-10.0 mmol / dm3, is performed, and then this water is electrolyzed to obtain washing water having >=8.0 and <=13.0 pH and / or 100 mV to 1,000 mV oxidation reduction potential.

Description

technical field [0001] The invention relates to a preparation method for obtaining alkaline cleaning water by electrolyzing water and the cleaning water. Background technique [0002] So far, a large number of halogenated hydrocarbon cleaning fluids represented by Freon 113 (FURON) or 1,1,1-trichloroethane have been used for degreasing and cleaning. However, many substances have been banned due to blame for causing damage to the ozone layer or environmental damage such as groundwater and soil pollution. On the other hand, technical development of cleaning methods to replace these substances is ongoing, and various cleaning methods have been proposed, but each has its own problems. [0003] Alternative cleaning methods can be divided into three categories: aqueous, quasi-aqueous and non-aqueous. [0004] The water system is the method of using alkaline detergent, neutral detergent, etc. and only city water or pure water. However, no matter what kind of water-based cleaning...

AI Technical Summary

Problems solved by technology

However, not all metals can show long-term effects. As long as it is washed with water, it is the same as other water cleaning methods, and anti-rust measures must be taken.