METALLIC SURFACE CONTROL AGENT AND LUBRICATION TREATMENT METHOD FOR METALLIC SURFACE

摘要

PROBLEM TO BE SOLVED: To provide a metallic surface control agent which is used for improving the service life and reactivity to a lubrication treatment before a metallic surface is subjected to nonreactive or reactive lubrication treatment, and to provide the lubrication treatment method for the metallic surface. SOLUTION: In a first method, a metallic surface cleaned by pickling is brought into contact with a surface control agent of pH 8 to 12 containing a carbonate, a bicarbonate and a nitrite in specified ratios at an ordinary temperature to 80°C for 1 to 10 min. The metallic surface is next brought into contact with a nonreaction series lubricant or an oil based lubricant. In a second method, the metallic surface with a chemical conversion coating formed by phosphate treatment or oxalate treatment is similarly contacted with the same control agent. COPYRIGHT: (C)2003,JPO