US1990070A - Bimetallic article - Google Patents

Bimetallic article Download PDF

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Publication number
US1990070A
US1990070A US661090A US66109033A US1990070A US 1990070 A US1990070 A US 1990070A US 661090 A US661090 A US 661090A US 66109033 A US66109033 A US 66109033A US 1990070 A US1990070 A US 1990070A
Authority
US
United States
Prior art keywords
lead
steel
sodium
coating
alloy
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
US661090A
Inventor
Herbert W Graham
Samuel L Case
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.)
Jones and Laughlin Steel Corp
Original Assignee
Jones and Laughlin Steel Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Jones and Laughlin Steel Corp filed Critical Jones and Laughlin Steel Corp
Priority to US661090A priority Critical patent/US1990070A/en
Application granted granted Critical
Publication of US1990070A publication Critical patent/US1990070A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
    • C23C2/10—Lead or alloys based thereon
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/922—Static electricity metal bleed-off metallic stock
    • Y10S428/9335—Product by special process
    • Y10S428/939—Molten or fused coating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12701—Pb-base component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12861—Group VIII or IB metal-base component
    • Y10T428/12951—Fe-base component
    • Y10T428/12972—Containing 0.01-1.7% carbon [i.e., steel]

Definitions

  • the coated material being known as terne plate.
  • the lead does not adhere directly to steel and it has heretofore been necessary to first apply tin or some other metal which will adhere to the steel and to which it) the lead will in turn adhere.
  • the intermediate tin coating serves primarily to insure'adherence of the lead and would be eliminated if it were possible to coat the steel directly, as it is an added expense.
  • the intermediate l coating can be eliminated and the lead made to adhere directly to the ferrous base bythe addition of sodium to the lead. Preferably around 4 to 5 percent of sodium will be used, but it may vary from 3 to 7 percent.
  • the minimum quan- 220 tity of sodium is dependent to some extent upon the cleanness of the steel. An imperfectly clean steel will take a satisfactory coating if 4 percent sodium is present in the alloy. If the steel is more thoroughly cleaned, the percentage of sodium may be somewhat lower.
  • the lead coat applied according to our invention is continuous in character and is ideal for protective purposes.
  • the lead sodium alloy wets the steel and adheres smoothly and uniformly over the surface.
  • the invention may be applied to articles of various shape or form and either by continuous operation or by individual a treatment. It is useful not only for protecting the base metal from the elements, but also for other purposes as, for example, it affords a lubricating sheath which permits of drawing or rolling the steel while cold without substantially increasing its hardness.
  • a body consisting of a steel base having a coating in direct engagement therewith, the coating being a binary alloy oflead and sodium, the sodium being present in the alloy in the amount of 3 to 7%, said coating resulting from treatment of the base with molten alloy between 720 F. and 820 F.

Description

l atenteol Feb. 5, 1 335 err income EHMETALHC ARTICLE Herbert W. Graham and Samuel L. Case, llittsburgh, lPa., assignors to Jones & Laughlin Steel Corporation, Pittsburgh, lPa., a corporation of Pennsylvania No Drawing.
Application March 16, 1933,
Serial No. 661,090 2 (Claims. (01. 91-702) This invention relates to bimetallic articles and particularly to a bimetallic body having a coating of lead.
It is common practice to apply a protective g coating of lead to steel, the coated material being known as terne plate. However, the lead does not adhere directly to steel and it has heretofore been necessary to first apply tin or some other metal which will adhere to the steel and to which it) the lead will in turn adhere. The intermediate tin coating serves primarily to insure'adherence of the lead and would be eliminated if it were possible to coat the steel directly, as it is an added expense. We have found that the intermediate l coating can be eliminated and the lead made to adhere directly to the ferrous base bythe addition of sodium to the lead. Preferably around 4 to 5 percent of sodium will be used, but it may vary from 3 to 7 percent. The minimum quan- 220 tity of sodium is dependent to some extent upon the cleanness of the steel. An imperfectly clean steel will take a satisfactory coating if 4 percent sodium is present in the alloy. If the steel is more thoroughly cleaned, the percentage of sodium may be somewhat lower.
Care should be used in maintaining the bath at proper temperature. Our experiments show that the range in which the alloy'will adhere to the base is relatively small and that the temperature should be between 720 and 820 F. The wire, strip or other product being coated is preferably immersed in the bath and then wiped ofi. The resulting coating is smooth; clean and uniform. Wires to which it has been applied have been 85 severely twisted but there is no evidence of brittleness or separation oi the coating.
The lead coat applied according to our invention is continuous in character and is ideal for protective purposes. The lead sodium alloy wets the steel and adheres smoothly and uniformly over the surface. The invention may be applied to articles of various shape or form and either by continuous operation or by individual a treatment. It is useful not only for protecting the base metal from the elements, but also for other purposes as, for example, it affords a lubricating sheath which permits of drawing or rolling the steel while cold without substantially increasing its hardness.
We have described a present preferred embodiment of our invention. It will be understood, however, that this is by way of illustration only and that it may be otherwise embodied or practiced within the scope of the following claims.
We claim:
1. In the method of coating a ferrous base with lead-sodium alloy, the steps consisting in forming a. molten bath consisting of lead having from 3% to 7% of sodium incorporated therein, and applying the molten lead-sodium alloy to the base while maintaining the bath at a temperature of 720 to 820 F.
2. As a new manufacture, a body consisting of a steel base having a coating in direct engagement therewith, the coating being a binary alloy oflead and sodium, the sodium being present in the alloy in the amount of 3 to 7%, said coating resulting from treatment of the base with molten alloy between 720 F. and 820 F.
HERBERT W. GRAHAM.
SAMUEL L. CASE.
US661090A 1933-03-16 1933-03-16 Bimetallic article Expired - Lifetime US1990070A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US661090A US1990070A (en) 1933-03-16 1933-03-16 Bimetallic article

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US661090A US1990070A (en) 1933-03-16 1933-03-16 Bimetallic article

Publications (1)

Publication Number Publication Date
US1990070A true US1990070A (en) 1935-02-05

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US661090A Expired - Lifetime US1990070A (en) 1933-03-16 1933-03-16 Bimetallic article

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2586142A (en) * 1947-11-10 1952-02-19 British Non Ferrous Metals Res Process for the production of lead coatings

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2586142A (en) * 1947-11-10 1952-02-19 British Non Ferrous Metals Res Process for the production of lead coatings

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