Method for the mechanical working of cast iron and an aqueous concentrate to be used in the method
AssigneeBerol Kemi AB
InventorsRolf O. Skold, Lars-Gosta von Dahn, Anna K. Sterky
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Abstract
Mechanical working of cast iron is performed in the presence of an aqueous metalworking composition containing an organic copper (II) complex and an iron corrosion inhibitor. An aqueous concentrate, which after dilution with water is suitable for application in mechanical working of cast iron, contains 1-50% copper (II) complex with such a Cu.sup.2+ -content of 0.5-20%, 1-50% iron corrosion inhibitor, 0-50% lubricant, 0-20% pH-regulators, bactericides and solubilizing agents and 10-70% water.
Claims22
In a method for the mechanical working of cast iron comprising mechanically working the cast iron in the presence of an alkaline aqueous metalworking composition, the improvement wherein said metalworking composition is essentially free of mineral oil and comprises:
- an organic copper (II) complex in an amount of 0.05-2% by weight of the composition;
- and
- an iron corrosion inhibitor in an amount of 0.1-5% by weight.
A metalworking composition concentrate, which is essentially free of mineral oil suitable for use, after dilution with water, in the mechanical working of cast iron, comprising:
- organic copper (II) complex:
- 1-50% by weight
- with a Cu.sup.2+ content of:
- 0.5-20% by weight
- iron corrosion inhibitor:
- 1-50% by weight
- lubricant:
- 0-50% by weight
- pH-regulator, bactericides and solubilizing agents:
- 0-20% by weight
- water:
- 10-70% by weight.
A metalworking composition, which is essentially free of mineral oil, suitable for use in the mechanical working of cast iron, comprising:
- organic copper (II) complex:
- 0.05-2% by weight
- iron corrosion inhibitor:
- 0.1-5% by weight
- lubricant:
- 0-3% by weight
- water:
- 85-99.5% by weight.
Dependencies are inferred from the claim text.