PURPOSE: To provide a cold rolling oil for steel plate effective to prevent the slipping, chattering and roll abrasion, by adding specific amounts of a water- soluble chelating agent and a specific water-soluble organic acid to an emulsion of a base oil having a specific viscosity and composed of a synthetic ester, etc.
CONSTITUTION: The objective cold rolling oil can be prepared by compounding (A) an aqueous emulsion of a base oil (having a viscosity of ≤15cst at 50°C) comprising (i) a synthetic ester (e.g. methyl stearate) or (ii) a mixture of the component (i) and an animal or vegetable oil (e.g. beef tallow) with (B) a water- soluble chelating agent (e.g. ethylenediaminetetraacetic acid-4Na salt) and/or (C) a water-soluble organic acid having two or more carboxyl groups (e.g. oxalic acid). The amount of the component (B) and (C) is 0.01W1.0%, preferably 0.05W 0.5% each.
EFFECT: The iron compound of said acid prevents the seizing of the work roll and the rolled material.
IWATOU SHIYUUICHI
SONODA SAKAE
KABUKI KOUJI
NIHON PARKERIZING