US1660847A - Method of coating metal - Google Patents

Method of coating metal Download PDF

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Publication number
US1660847A
US1660847A US142784A US14278426A US1660847A US 1660847 A US1660847 A US 1660847A US 142784 A US142784 A US 142784A US 14278426 A US14278426 A US 14278426A US 1660847 A US1660847 A US 1660847A
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US
United States
Prior art keywords
lead
tin
bath
phosphorus
molten lead
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
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US142784A
Inventor
Millring Edwin Ross
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.)
AMF Inc
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AMF Inc
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
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Priority to US142784A priority Critical patent/US1660847A/en
Application granted granted Critical
Publication of US1660847A publication Critical patent/US1660847A/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
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C11/00—Alloys based on lead
    • C22C11/06—Alloys based on lead with tin as the next major constituent

Definitions

  • This invention relates to a method of coating metal.
  • tin phos- 5 phide or phosphor-tin is added to the bath of molten lead from time to time during the coating process, in order to prepare the molten lead for adherence to the metal to be coated, the proportion of phosphor-tin being not over 3% of the bath.
  • the phosphorus disappears, while the tin remains in the bath of molten lead. The result is, that while sufiicient phosphorus is maintained in the bath of molten lead to cause itto adhere to the metal to be coated, yet the tin accumulates in said bath and the percentage of tin therein gradually increases.
  • the presence of some tin is necessary in order to increase the solu- 'bility of the phosphorus in the lead, but too much of it is detrimental to the practice of the art.
  • the main object of the present invention is the production of a new method whereby the advantages of the tin are retained, but the accumulation and disadvantages of the same are avoided.
  • a bath of molten lead is first prepared. Then there is added to the molten lead a modicum of tin, approximately'3% having been found to be sufiicient for the purpose. This tin contains no phosphorus but acts upon the lead to increase its solubility of phosphorus.
  • a method of coating metal which consists in' preparing a bath of molten lead,

Description

Patented re. 2e, 12.
s'rras EDWIN RUSS IUIILBHIG, OF ORANGE, NEW JERSEY, ASSIGNOB- TO AMERICAN MACHINE & FGU'NDRY COMPANY, A CORPORATION 012 NEW JERSEY.
HE'IHOD'OF COATETG IHETAL.
No Drawing.
This invention relates to a method of coating metal.
In coating metal with lead by the hot dipping process already known, tin phos- 5 phide or phosphor-tin is added to the bath of molten lead from time to time during the coating process, in order to prepare the molten lead for adherence to the metal to be coated, the proportion of phosphor-tin being not over 3% of the bath. During this process the phosphorus disappears, while the tin remains in the bath of molten lead. The result is, that while sufiicient phosphorus is maintained in the bath of molten lead to cause itto adhere to the metal to be coated, yet the tin accumulates in said bath and the percentage of tin therein gradually increases. The presence of some tin is necessary in order to increase the solu- 'bility of the phosphorus in the lead, but too much of it is detrimental to the practice of the art. The main object of the present invention is the production of a new method whereby the advantages of the tin are retained, but the accumulation and disadvantages of the same are avoided.
In carrying the invention into effect, a bath of molten lead is first prepared. Then there is added to the molten lead a modicum of tin, approximately'3% having been found to be sufiicient for the purpose. This tin contains no phosphorus but acts upon the lead to increase its solubility of phosphorus. Then there is added to the molten lead thus prepared and from time to time during the coating process, a modicum of phosphor lead to prepare and maintain the molten lead in condition for adherence to the metal to be coated, lead instead of tin bein the 40 vehicle by means of which the phosp orus is introduced intothe bath, and the quantity of phosphorus inv the phosphor lead being approximately the same as the quantity of phosphorus in the phosphor-tin heretofore used. By the use of this method, the addition of the phosphorus from time to time Application filed October 19, 1926. SeriaIHo. 142,784.
does not involve any increase in the percentage of tin in the bath, and the quantity of phosphor lead is so smallthat there is .no appreciable increase in the percentage of lead in the bath. But since the phosphorus disappears during the coating process, it is necessary from time to time during said process to add other Very small quantities of phosphor lead in order to maintain the molten lead in condition for adherence to the metal to be coated. The metal to be coated is passed through the molten lead thus prepared andmaintained in condition for adherence thereto. I
What is claimed is: i
1. A method of coating metal, which consists in' preparing a bath of molten lead,
then melting tin only in the molten lead to increase its solubility of phosphorus,=then adding phosphor lead to the molten lead and tin at the beginning of and from time to time during the actual coating operation to prepare and to maintain it in uniform condition for adherence to the metal to be coated, and then passing the metal to be coated through the bath thus prepared and maintained. v
2. The series of steps in a method of coating metal, which consists in preparing a bath of molten lead, then melting tin only in the molten lead to increase its solubility of phosphorus, then adding phosphor lead to the molten lead and tin at the beginning of and from time to time during the actual coating operation to prepare and to maintain it in uniform condition for adherence to the metal to be coated.
3. The series of steps in a method of coating metal, which consists in preparing a bath of molten lead containing'tm only to increase its solubility of phosphorus, and thereafter adding phosphor lead to the molten lead and tin.
- In testimony whereof, I have signed my name to this specification.
EDWIN ROSS 'MILLRI G.
US142784A 1926-10-19 1926-10-19 Method of coating metal Expired - Lifetime US1660847A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US142784A US1660847A (en) 1926-10-19 1926-10-19 Method of coating metal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US142784A US1660847A (en) 1926-10-19 1926-10-19 Method of coating metal

Publications (1)

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US1660847A true US1660847A (en) 1928-02-28

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2515022A (en) * 1947-04-02 1950-07-11 Anaconda Wire & Cable Co Method of tinning copper wire

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2515022A (en) * 1947-04-02 1950-07-11 Anaconda Wire & Cable Co Method of tinning copper wire

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