| 摘要 |
PROBLEM TO BE SOLVED: To impart a rust preventive effect (discoloration prevention and corrosion prevention) to a copper or copper alloy sheet or strip by subjecting the copper or copper alloy sheet or strip to rust preventive treatment by benzotriazole or its derivative and simultaneously to prevent the deposition of green powder on a wiping pad at the time of press working, such as punching. SOLUTION: The surface of the copper or copper alloy sheet or strip is subjected to the rust preventive treatment by the benzotriazole or its derivative and thereafter a press oil or rolling mill lubricant is applied thereto. The oil of a viscosity 1 to 30 cst is preferably applied thereto at a coating weight of 0.01 to 10 mg/m<SP>2</SP>. By the coating application of the oil, the dislodgment of the rust inhibitive film by the benzotriazole from the surface of the sheet or strip is substantially prevented, the generation of the green powder is suppressed and the deposition of the green powder of the wiping pad is prevented. COPYRIGHT: (C)2005,JPO&NCIPI
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