Water-based metal working fluid

A water-based, recyclable metalworking fluid comprising, on a weight basis:

• 12–14% of a water-soluble polyalkylene glycol lubricating agent;
• 1–15% of an alkanolamine;
• 5–7% of a polyglycol surfactant having a composition which differs from that of said polyalkylene glycol surfactant;
• 0.5–1.0% of a polyol surfactant having a composition which differs from that of said polyalkylene glycol lubricating agent and said polyglycol surfactant;
• 10–30% of a corrosion inhibitor;
• 0.5–1.0% of a biocide;
• and
• the remainder, water;
• said fluid being further characterized in that it is free of fatty acids.

A method for shaping a metal workpiece, said method including the step of:

• contacting said workpiece with a water-based, recyclable metalworking fluid, while said workpiece is being shaped, said fluid comprising:
• a water soluble polyalkylene glycol lubricating agent;
• an alkanolamine;
• a polyglycol surfactant having a composition which differs from that of said polyalkylene glycol lubricating agent;
• a polyol surfactant having a composition which differs from that of said polyalkylene glycol lubricating agent and said polyglycol surfactant;
• a biocide;
• and
• a corrosion inhibitor;
• said fluid being further characterized in that it is free of fatty acids.

A water-based, recyclable metalworking fluid comprising:

• water;
• a water-soluble polyalkylene glycol lubricating agent;
• an alkanolamine;
• a polyglycol surfactant having a composition which differs from that of said polyalkylene glycol lubricating agent;
• a polyol surfactant having a composition which differs from that of said polyalkylene glycol lubricating agent and said polyglycol surfactant;
• a biocide;
• a corrosion inhibitor;
• and
• an isoalkoxy amine oxide.