| 摘要 |
PROBLEM TO BE SOLVED: To provide a cleaning method for non-chromium film-coated steel plate products free from a conventional aqueous alkaline detergent with satisfactory cleaning quality, and harmless to human body and environment. SOLUTION: The method comprises cleaning with an aqueous alkaline solution (an electrolytic aqueous alkaline solution) at pH 8.0-12.0 and at 20-80°C produced by electrolysis of water with a redox potential of -100 mV to -1,000 mV and residual chlorine content of 5 ppm or less. COPYRIGHT: (C)2006,JPO&NCIPI
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