| 摘要 |
PROBLEM TO BE SOLVED: To provide a pickling acceleration agent which can be practically used for promoting a pickling degree when a steel material is pickled by using a pickling liquid. SOLUTION: The pickling acceleration agent includes at least one compound selected from the group consisting of a carbonic ester such as an alkylene carbonate and a dialkyl carbonate, and 2,4-hydroxybenzoic acid. The pickling method includes immersing the steel material into the pickling liquid containing the pickling acceleration agent and acid. The acid is, for instance, an inorganic acid. The pickling liquid includes the pickling acceleration agent of 0.1 g/L or higher and the acid of 10 to 500 g/L; and is set at 70°C or higher when being used for pickling. COPYRIGHT: (C)2007,JPO&INPIT
|
