US1615707A - Corrosion-resisting metal - Google Patents

Corrosion-resisting metal Download PDF

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Publication number
US1615707A
US1615707A US748941A US74894124A US1615707A US 1615707 A US1615707 A US 1615707A US 748941 A US748941 A US 748941A US 74894124 A US74894124 A US 74894124A US 1615707 A US1615707 A US 1615707A
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US
United States
Prior art keywords
corrosion
cadmium
tin
metal
resisting metal
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
US748941A
Inventor
Charles E Jones
Mark A Atuesta
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Priority to US748941A priority Critical patent/US1615707A/en
Application granted granted Critical
Publication of US1615707A publication Critical patent/US1615707A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/10—Electroplating with more than one layer of the same or of different metals
    • 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
    • Y10S428/934—Electrical process
    • Y10S428/935—Electroplating
    • 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
    • Y10S76/00—Metal tools and implements, making
    • Y10S76/06—Laminated
    • 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
    • Y10S76/00—Metal tools and implements, making
    • Y10S76/12—Diamond tools
    • 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.]
    • Y10T428/12708—Sn-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
    • Y10T428/12785—Group IIB metal-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

Definitions

  • Our present invention relates particularly to the protection against corrosion of iron and steel, but may be applicable to other metals as well.
  • Iron and steel are often used in places .where the metal is not only subject to ordinary atmospheric corrosion or rusting, but also to more active chemical action by fumes or corrosive liquids. Under the combined action of these deteriorating agencies, the life of articles made of ferrous metal is likely to be very short. Ordinary rustproofing treatment will effect but little improvement as the coating agents used for rust-proofing usually will not Withstand the corrosion caused by acid fumes or thelike.
  • Thisv coating comprises a layer of a rust-proofing metal, such for example as cadmium, overlaid by a layer of a metal capable of withstanding acids, as tin, for example.
  • a film of cadmium maybe applied by any well known method.
  • a plating bath comprising a solution in water of a cadmium salt, a cyanide and an alkali may be used.
  • Cadmium hydrate 4 ounces; sodium cyanide. 6 ounces; caustic soda, 1 ounce; Water, 1 gallon. 4
  • the thickness of the cadmium film may be varied with conditions.
  • a -tin film may be applied by any ap provedmethod.
  • a solution of the following composition' may be need:
  • Tin chloride 2 ounces; -sodium cyanide,
  • a suitable coating may be deposited from the above bath in about fifteen minutes at room temperature.
  • Some of the benefits of our invention may be obtained by using zinc as the rust-proof ing'metal in place of cadmium and thereupon applying tin over the zinc coating, and
  • An article of manufacture comprising a body ofv ferrous metal. a film of cadmium thereon and a film of tin overlaying said cadmium film.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
  • Electroplating Methods And Accessories (AREA)

Description

no 2 1 o 1 61 707 927 c. E. JONES ET AL.
CORROSION RESISTING METAL Filed Nov. 10, 1924 COATED WITH MOM/UM ,4/v0 7'//V V Inventors:
Charles E. Jones,
mark A.Atuesta,
The h" Attorney.
Patented Jan. 25, 19 27. I
UNITED STATES,
PATENT OFFICE.
CHARLES E. JONES AND MARK A. ATUESTA, OF SCHENEGTADY, YORK, AS- SIGNORS TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.
CORROSION-KESISTING METAL.
Application filed November 10, 1924. Serial No. 748,941. I
Our present invention relates particularly to the protection against corrosion of iron and steel, but may be applicable to other metals as well.
Iron and steel are often used in places .where the metal is not only subject to ordinary atmospheric corrosion or rusting, but also to more active chemical action by fumes or corrosive liquids. Under the combined action of these deteriorating agencies, the life of articles made of ferrous metal is likely to be very short. Ordinary rustproofing treatment will effect but little improvement as the coating agents used for rust-proofing usually will not Withstand the corrosion caused by acid fumes or thelike.
In accordance with our invention we have provided a composite coating which will withstand both the conditions leading to rusting and also acidic corrosion. Thisv coating comprises a layer of a rust-proofing metal, such for example as cadmium, overlaid by a layer of a metal capable of withstanding acids, as tin, for example.
A practical utilization of' ur invention 1s illustrated by the accompanying drawing which shows in perspective a trolley wire hanger as an example of an object coated in accordance with our invention with the above attendant advantages.
In carrying out our invent-loathe metal article is cleaned by theusual well known method ,to produce a surface condition suitable for electroplatirig.- A film of cadmium maybe applied by any well known method. For example, a plating bath comprising a solution in water of a cadmium salt, a cyanide and an alkali may be used. We have used the following Solution with success with a current densityof about 8 to 10 am-- peres per square foot:
Cadmium hydrate, 4 ounces; sodium cyanide. 6 ounces; caustic soda, 1 ounce; Water, 1 gallon. 4
The thickness of the cadmium film, of course, may be varied with conditions. WVe
in thickness produced by plating at the above current 'density' for about thirty minutes at room temperature is sufficient A -tin film may be applied by any ap provedmethod. For example a solution of the following composition'may be need:
Tin chloride, 2 ounces; -sodium cyanide,
ounce; caustic soda, 8 ounces; cream of tartar, 1 ounce; water, 1 gallon.
With a currentzdensity of ten amperes per square foot a suitable coating may be deposited from the above bath in about fifteen minutes at room temperature.
The electrolytic potential of tin with respect to a ferrous metal is so considerablethat a ferrous metal article coated with tin alone would be attacked very rapidly in the presence of an electrolytelsuch as water containing an acid wherever-the tin coating was locally imperfect due to wear, or an accidental scratch orany other reason. The
presence of the cadmium however will protect the ferrous metal even when the -.tin coating is marred. On the other hand, cadmium alone will not withstand as well as tin the influence of acidic corrosion.
Some of the benefits of our invention may be obtained by using zinc as the rust-proof ing'metal in place of cadmium and thereupon applying tin over the zinc coating, and
holding leather during the process of treat-.
ment. particularly when making the so-called patent leather. v
What we-claim as new .and desire to secure by Letters Patent of the United States,
An article of manufacture comprising a body ofv ferrous metal. a film of cadmium thereon and a film of tin overlaying said cadmium film. g
In witness Wh81' e0f, we have hereunto set our hands this 7th day of November. 1924. CHARLES E. JONES. MARK A. ATUESTA.
we desire the appended claims, therefore, to
US748941A 1924-11-10 1924-11-10 Corrosion-resisting metal Expired - Lifetime US1615707A (en)

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US748941A US1615707A (en) 1924-11-10 1924-11-10 Corrosion-resisting metal

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2858520A (en) * 1955-01-03 1958-10-28 Chance Co Ab Electrical connector
US3011957A (en) * 1957-11-29 1961-12-05 Eigenmann Eugene Method for protecting metals against corrosion
US3494400A (en) * 1967-10-24 1970-02-10 John J Mccoy Helical spring lockwasher
US4143210A (en) * 1977-09-30 1979-03-06 Whyco Chromium Company, Inc. Multi-layer plating for improved corrosion resistance

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2858520A (en) * 1955-01-03 1958-10-28 Chance Co Ab Electrical connector
US3011957A (en) * 1957-11-29 1961-12-05 Eigenmann Eugene Method for protecting metals against corrosion
US3494400A (en) * 1967-10-24 1970-02-10 John J Mccoy Helical spring lockwasher
US4143210A (en) * 1977-09-30 1979-03-06 Whyco Chromium Company, Inc. Multi-layer plating for improved corrosion resistance

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