EP0382155B1 - Water soluble salt precoats for wire drawing - Google Patents

Water soluble salt precoats for wire drawing Download PDF

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Publication number
EP0382155B1
EP0382155B1 EP90102275A EP90102275A EP0382155B1 EP 0382155 B1 EP0382155 B1 EP 0382155B1 EP 90102275 A EP90102275 A EP 90102275A EP 90102275 A EP90102275 A EP 90102275A EP 0382155 B1 EP0382155 B1 EP 0382155B1
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EP
European Patent Office
Prior art keywords
composition
weight
sodium
component
total
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP90102275A
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German (de)
English (en)
French (fr)
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EP0382155A1 (en
Inventor
Thomas W. Tull
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Henkel Corp
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Henkel Corp
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Priority to AT90102275T priority Critical patent/ATE92951T1/de
Publication of EP0382155A1 publication Critical patent/EP0382155A1/en
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    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/20—Metal working
    • C10N2040/244—Metal working of specific metals
    • C10N2040/245—Soft metals, e.g. aluminum
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/20—Metal working
    • C10N2040/244—Metal working of specific metals
    • C10N2040/246—Iron or steel
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/20—Metal working
    • C10N2040/244—Metal working of specific metals
    • C10N2040/247—Stainless steel
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2050/00—Form in which the lubricant is applied to the material being lubricated
    • C10N2050/01—Emulsions, colloids, or micelles
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2050/00—Form in which the lubricant is applied to the material being lubricated
    • C10N2050/015—Dispersions of solid lubricants
    • C10N2050/02—Dispersions of solid lubricants dissolved or suspended in a carrier which subsequently evaporates to leave a lubricant coating

Definitions

  • This invention relates to modified water soluble salt precoats for use in the cold drawing of steel wire.
  • Water soluble salt coatings are often applied to steel wire in the form of aqueous solutions prior to drawing.
  • the solution-coated wire is dried and the resulting salt coated wire is then drawn through conventional reducing dies using dry soap lubricants - a process well-known to this art.
  • the water soluble salt coating acts as a lubricant carrier, pulling the dry soap box lubricant into the dies, thus providing lubrication.
  • These dried-in-place, water soluble salt coatings have proven to be superior to other conventional coatings such as lime or borax coatings because of their improved ability to carry lubricant into the dies.
  • a typical soluble salt composition used for the coating of steel (usually stainless steel) wire contains both sodium sulfate and borax.
  • Such soluble salt compositions provide coatings with excellent crystalline structure, resulting in good soap lubricant pick-up when the coated wire is passed through a soap box, and therefore good drawability.
  • Such salt coating are prone to excessive moisture absorption upon exposure to ambient air, particularly when exposed to air having high humidity. Such moisture absorption seriously interferes with, or even prevents, the drawings of the coated wire.
  • soluble salt coating which provide low moisture absorption provide little or no crystalline structure (i.e. amorphous or glaze type coatings) and are significantly inferior in both lubricant pick-up and drawability. This Hobson's choice problem has not previously been solved.
  • US-A-2 957 825 discloses a lubricant composition which comprises borax, sulphur salts and a soap.
  • GB-A-2 003 923 discloses a metal working lubricant comprising a water soluble metallic soap such as sodium stearate in combination with alkali metal chlorides, sulphates and borates.
  • compositions for coating steel wire have now been discovered which provide uniform coatings with good crystalline structure, soap pick-up, and drawability, while at the same time low moisture absorption even during humid days, i.e. low hygroscopicity.
  • compositions of the invention which are in the form of dry mixtures prior to dilution with water for use, in contain the following components:
  • the K2SO4 used as component A can be chemically pure or of a technical grade; the latter being preferred due to cost considerations.
  • the K2B4O7 used as component B can also be chemically pure or a technical grade, and is generally available and used herein as the tetrahydrate (K2B4O7 ⁇ 4H2O).
  • the KBO2 which can be used alone as component B, or in a mixture with K2B4O7 in any proportions, can be chemically pure or a technical grade.
  • the ammonium or potassium soap is one or more ammonium and/or potassium salts of a C12-C22 fatty acid or mixture of two or more such C12-C22 fatty acids.
  • the fatty acids are generally saturated and unbranched, with ammonium or potassium stearate being preferred for use herein, although mono- or di-olefinically unsaturated C12-C22 fatty acids can also be employed, either alone or in mixtures with each other and/or with saturated fatty acids.
  • ammonium and potassium soaps derived from the fatty acid mixtures obtained by the saponification of tallow oil or coconut oil, or a mixture thereof, can advantageously be employed as component C.
  • ammonium or potassium salts of branched or cycloaliphatic-containing C12-C22 fatty acids can also be employed herein, either alone or in mixtures with unbranched fatty acid salts.
  • ammonium or potassium rosin acids e.g. abietic acid, can also be employed as component C.
  • the wires coated with the coating compositions of the invention are generally steel wires, and usually stainless steel wires.
  • other wire substrates can also be coated with the present coating compositions such as mild steel, titanium, vanadium, tungsten, aluminum, copper, nickel, zirconium, etc., and alloys thereof.
  • the coatings are applied by contacting the wires with an aqueous solution of the composition of the invention, and allowing the resulting wet coating to dry in place, either with or without the application of heat.
  • the aqueous solutions generally contain from 75 to 400 g/l of the composition in water, preferably from 150 to 250 g/l.
  • the wire is contacted with the solution by any convenient technique, either batch or a continuous strand, and allowing the resulting wet-coated wire to air dry before coiling for storage, shipping, or use.
  • the coated wire is then passed through conventional cold reduction equipment using a soap box (e.g. containing a conventional dry soap lubricant).
  • the coating on the wire functions as a carrier to carry the dry soap lubricant into the die.
  • the steps employed in the treatment of wire according to the invention include the following:
  • the coated wire can then be drawn, also as described above.
  • the water used in preparing the aqueous solutions of the invention is preferably distilled or deionized water, but tap water can also be used provided it is not overly hard and has a low dissolved sodium salts content.
  • aqueous compositions were tested for their morphology and hygroscopicity, when coated on stainless steel panels.
  • Stainless steel panels were coated with each of the following compositions by immersing the panels in the aqueous composition, removing the panels from the aqueous composition, and allowing them to flash (air) dry.
  • composition of the invention As can be seen from Table I, the composition of the invention, composition d), produced a coating with good crystallinity, and low hygroscopicity.
  • This example shows the effect of relative ratios of sodium and potassium ions on the hygroscopicity of the water soluble salt coatings.
  • stainless steel panels were coated in accordance with Example 1 using the following compositions, at a concentration of 187.2 g/l in deionized water, set forth in Table II below together with test results.
  • This example shows the relative hygroscopicity of lime coatings compared to the coating from a known sodium based salt composition and a low sodium salt composition of the invention.
  • the coatings were produced on samples of the stainless steel wire used in Example 1 according to the procedure of Example 1 from the following aqueous compositions:
  • composition k) in accordance with the invention has significantly reduced hygroscopicity compared to lime coatings l) and m).
  • Ten difference coating bath compositions were evaluated for moisture pick up, morphology, coating uniformity, and crsytals per inch on stainless steel panels.
  • the stainless steel panels were coated with the coating compositions and coating baths set forth in Table IV, according to the process given in Example 1, except that the wet-coated panels were dried using a 10 minute bake at 250°F. Moisture pick-up was determined in a chamber which allowed constant temperature and humidity of 80°F and 92% respectively. A Surtronic 3 surface prophylometer was used to determine the number of crystals per inch of caoting. Coating characterization and coating appearance were determined by visual observation.
  • compositions F, G, and J are compositions in accordance with the invention, while compositions A, B, C, D, E, H and I are comparison compositions.
  • compositions F, G, and J produced uniform coatings while exhibiting low moisture pick up.
  • the only comparison composition that produced a uniform coating was composition B, which however exhibited an unacceptably high moisture pick up.
  • compositions A, B and C all exhibited unacceptably high moisture pick up, and hence poor wire drawability properties in humid conditions.
  • Coating composition E contains potassium sulfate and sodium stearate soap in accordance with the compositions of the invention, except that the sodium stearate soap is present in too high a quantity, resulting in a non-uniform, mostly glaze coating, having unacceptable wire drawing properties.
  • Coating compositions D, H, and I which are potassium salt compositions in accordance with the invention except that no soap is present therein, all produced unacceptable non-uniform coatings and hence unacceptability inconsistent wire drawing characteristics.
  • composition J containing an alkali metal tetraborate produced the most crystalline coating. Hence, the presence of a tetraborate in the coating compositions of the invention, while optional, is nonetheless highly preferred.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Lubricants (AREA)
  • Metal Extraction Processes (AREA)
  • Paints Or Removers (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Ropes Or Cables (AREA)
  • Communication Cables (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Detergent Compositions (AREA)
  • Nonmetallic Welding Materials (AREA)
EP90102275A 1989-02-07 1990-02-06 Water soluble salt precoats for wire drawing Expired - Lifetime EP0382155B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90102275T ATE92951T1 (de) 1989-02-07 1990-02-06 Wasserloesliche salzueberzuege zum drahtziehen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US30764389A 1989-02-07 1989-02-07
US307643 1989-02-07

Publications (2)

Publication Number Publication Date
EP0382155A1 EP0382155A1 (en) 1990-08-16
EP0382155B1 true EP0382155B1 (en) 1993-08-11

Family

ID=23190606

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90102275A Expired - Lifetime EP0382155B1 (en) 1989-02-07 1990-02-06 Water soluble salt precoats for wire drawing

Country Status (11)

Country Link
EP (1) EP0382155B1 (da)
JP (1) JPH02229893A (da)
CN (1) CN1044774A (da)
AT (1) ATE92951T1 (da)
AU (1) AU621980B2 (da)
BR (1) BR9000543A (da)
CA (1) CA2009377A1 (da)
DE (1) DE69002649T2 (da)
DK (1) DK0382155T3 (da)
ES (1) ES2059847T3 (da)
ZA (1) ZA90917B (da)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4440301A1 (de) * 1994-11-11 1996-05-15 Metallgesellschaft Ag Schmiermittelträgersalz für die Metallumformung
CN102152069B (zh) * 2011-01-30 2013-06-05 烟台鑫杰特钢有限公司 一种气阀钢型材生产方法
CN104593125B (zh) * 2015-01-29 2017-07-11 南京工程学院 一种抗结块拉丝润滑粉
IT202200006158A1 (it) 2022-03-29 2023-09-29 Condoroil Chemical S R L Processo per produrre un rivestimento per operazioni di deformazione a freddo esente da boro

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2957825A (en) * 1956-10-15 1960-10-25 Devex Corp Powdered soap lubricant containing inorganic sulfur salts
GB2003923B (en) * 1977-09-07 1982-03-10 Foseco Int Metal working lubricants
CH670106A5 (da) * 1984-07-23 1989-05-12 Lonza Ag

Also Published As

Publication number Publication date
DE69002649D1 (de) 1993-09-16
JPH02229893A (ja) 1990-09-12
DK0382155T3 (da) 1993-09-20
ZA90917B (en) 1990-11-28
ES2059847T3 (es) 1994-11-16
CA2009377A1 (en) 1990-08-07
EP0382155A1 (en) 1990-08-16
ATE92951T1 (de) 1993-08-15
CN1044774A (zh) 1990-08-22
AU4920990A (en) 1990-08-16
DE69002649T2 (de) 1993-12-16
BR9000543A (pt) 1991-01-15
AU621980B2 (en) 1992-03-26

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