| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for cleaning a steel strip by which a stable rinsing effect can be obtained even if a water solution containing a surfactant is used as a rinsing agent, and also the rinsing agent is circularly used in a rinsing stage in the method for cleaning a steel strip. SOLUTION: The method for cleaning the steel strip includes: a cleaning stage (1) where stain stuck to a steel strip is cleaned with a detergent; and a rinsing stage (2) where the steel strip after being subjected to the cleaning stage (1) is rinsed with a rinsing agent W. The rinsing agent used in the rinsing stage (2) uses a water base composition containing a cationic surfactant (a) expressed by general formula (1). In the formula, R denotes a 14 to 18C hydrocarbon group; R<SP>2</SP>, R<SP>3</SP>and R<SP>4</SP>are the same or different, and denote a hydrogen atom or a 1 to 3C hydrocarbon group; and X<SP>-</SP>denotes an inorganic anion or an organic anion. COPYRIGHT: (C)2009,JPO&INPIT
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