Water-dispersible metal working fluid

A process for making a water-dispersible metal working fluid comprising the steps of:

• (a) placing vegetable oil into a mixing vessel;
• (b) heating the vegetable oil of step (a) to a preselected temperature;
• (c) mixing the vegetable oil of step (a) with an antigumming agent, a corrosion inhibitor and a surfactant;
• (d) mixing a saponifier into the mixture of step (c);
• (e) mixing a buffer into the mixture of step (d) to form a pre-emulsion concentrate;
• and
• (f) mixing the pre-emulsion concentrate with water to form the metal working fluid.

A water-dispersible metal working fluid comprising:

• about 50% to about 95% by weight of crude vegetable oil;
• about 3% to about 20% by weight of alkyl esters;
• about 0.1% to about 2% of a corrosion inhibitor;
• about 5% to about 50% by weight of a surfactant;
• about 1% to about 9% by weight of potassium hydroxide;
• about 2% to about 15% by weight of triethanolamine;
• about 0.1% to about 2% by weight of a preservative;
• and
• about 0.01% to about 5% by weight of a fragrance.