Metal treatment – Process of modifying or maintaining internal physical... – Processes of coating utilizing a reactive composition which...
Patent
1999-05-27
2000-05-30
Green, Anthony
Metal treatment
Process of modifying or maintaining internal physical...
Processes of coating utilizing a reactive composition which...
106 1412, 148253, 148259, 148275, C23C 2207
Patent
active
06068710&
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to aqueous liquid treatment compositions suitable for forming on metal surfaces, particularly ferriferous metal surfaces, a novel coating containing a mixture of iron phosphate(s) and a boron containing lubrication promoting material. These coatings, either as applied or preferably after the application of additional lubricant materials that are already known in the art, are protective against mechanical damage during cold working of the underlying metal. Processes for using these compositions are also part of the invention.
2. Statement of Related Art
A very widely accepted currently conventional method of preparing metal surfaces for cold working is to apply a heavy zinc phosphate coating to the surface and then apply a composition containing an alkali metal soap, usually sodium stearate, which reacts with the zinc content of the zinc phosphate coating to form a very effective lubricant layer that is believed to contain zinc soap. This practice produces excellent results, but current environmental concerns militate against the use of zinc and other heavy metals such as nickel, manganese, and calcium, which are often required to obtain the best lubricant properties when using this technique. The metal soap containing coatings formed on metal surfaces in this way are also sources of a substantial dust nuisance in many cases.
Decades ago, iron phosphating was commonly used as a basis for lubricant layers for cold working metals, but the thicker layers provided by zinc phosphating generally have been found to produce more effective lubrication and thus are highly preferred. Conventional aqueous iron phosphating treatment compositions contain primarily alkali metal or ammonium phosphates, sometimes additional phosphoric acid, and usually some kind of accelerator as their active ingredients.
DESCRIPTION OF THE INVENTION
Objects of the Invention
A major object of this invention is to provide lubricants and processes that will eliminate or at least reduce the environmental disutilities noted above while still achieving cold working performance that is adequate when compared with the prior art use of phosphate conversion coatings followed by zinc soap application. Another alternative or concurrent object is to reduce total energy and/or other costs of cold forming operations, particularly by (i) reducing process related waste of objects being cold worked, (ii) achieving higher production rates per unit time, and/or (iii) reducing the number of processing steps required.
General Principles of Description
Except in the claims and the working and comparison examples, or where otherwise expressly indicated, all numerical quantities in this description indicating amounts of material or conditions of reaction and/or use are to be understood as modified by the word "about" in describing the broadest scope of the invention. Practice within the numerical limits stated is generally preferred. Also, unless expressly stated to the contrary: percent, "parts" of, and ratio values are by weight; the term "polymer" includes "oligomer", "copolymer", "terpolymer", and the like; the description of a group or class of materials as suitable or preferred for a given purpose in connection with the invention implies that mixtures of any two or more of the members of the group or class are equally suitable or preferred; description of constituents in chemical terms refers to the constituents at the time of addition to any combination specified in the description, and does not necessarily preclude chemical interactions among the constituents of a mixture once mixed; specification of materials in ionic form implies the presence of sufficient counterions to produce electrical neutrality for the composition as a whole (any counterions thus implicitly specified should preferably be selected from among other constituents explicitly specified in ionic form, to the extent possible; otherwise such counterions may be freely selected, except for avoiding counteri
REFERENCES:
patent: 2528787 (1950-11-01), Roland
patent: 2992145 (1961-07-01), Stantangelo et al.
patent: 3886894 (1975-06-01), Brekle
patent: 4262057 (1981-04-01), Godek et al.
patent: 5045130 (1991-09-01), Gosset et al.
patent: 5344505 (1994-09-01), Ouyang et al.
patent: 5366569 (1994-11-01), Mueller et al.
patent: 5368757 (1994-11-01), King
patent: 5531912 (1996-07-01), Church et al.
patent: 5545438 (1996-08-01), Ouyang et al.
patent: 5547595 (1996-08-01), Hacias
Green Anthony
Harper Stephen D.
Henkel Corporation
Jaeschke Wayne C.
Wisdom, Jr. Norvell E.
LandOfFree
Aqueous composition and process for preparing metal substrate fo does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Aqueous composition and process for preparing metal substrate fo, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Aqueous composition and process for preparing metal substrate fo will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1907574