B - Operations – Transporting – 05 – D
Patent
B - Operations, Transporting
05
D
117/156, 148/19
B05D 5/08 (2006.01) C23C 22/17 (2006.01) C23C 22/82 (2006.01) C23C 22/83 (2006.01)
Patent
CA 2008551
Abstract of the Disclosure An improved lubricating layer for heavy cold working of iron and steel objects can be obtained by first phos- phating them with a solution comprising, in percentages by weight, 0.3 to 2.5 % of zinc ions, 0.01 to 2.0 % of ferrous ions, 0.5 to 5.0 % of phosphate ions, 0.7 to 12.0 % of ni- trate ions, and 0.02 to 0.25 % of water soluble aromatic organic compounds that contain both nitro and sulfonic groups, with the ferrous ion and zinc ion contents addi- tionally being such that the weight ratio of ferrous ions to zinc ions in the phosphating solution in within the range from 0.005 to 3Ø Optionally, the phosphating solu- tion may also contain from 0.2 to 2.0 % of calcium ions, and when it does, the weight ration of calcium ions to zinc ions in the solution should also be in the range from 0.7 to 4Ø After phosphating, the phosphated surfaces are treated with a conventional lubricant, preferably a weakly alkaline solution of sodium stearate. Henkel Corporation Law Department 300 Brookside Avenue Ambler, PA 19002 4::C:\M4797NI.APP
Nagae Yoshio
Okumura Yasuo
Sawasaki Yoshihiko
Tanizawa Yasuo
Fetherstonhaugh & Co.
Henkel Corporation
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