| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for producing a high-strength cold-rolled steel sheet excellent in a corrosion resistance after coating, even under such severe atmosphere as a hot brine dipping test and a compound cycle corrosion test. <P>SOLUTION: In the method for producing the high-strength cold-rolled steel sheet excellent in the corrosion resistance after coating, a steel slab containing 0.8-3.0 mass% Si is hot-rolled, is pickled, is cold-rolled and is continuous-annealed, then is dipped into alkali-solution after pickling or is diopped and pickled into the alkali-solution, and aquious solution containing S compound is brought into contact with the surface of the steel sheet, thereby existing the S compound of 0.1-100 mg/m<SP>2</SP>in terms of S on the surface of the steel sheet. <P>COPYRIGHT: (C)2007,JPO&INPIT |
