US456204A - Manufacture of galvanized iron - Google Patents
Manufacture of galvanized iron Download PDFInfo
- Publication number
- US456204A US456204A US456204DA US456204A US 456204 A US456204 A US 456204A US 456204D A US456204D A US 456204DA US 456204 A US456204 A US 456204A
- Authority
- US
- United States
- Prior art keywords
- zinc
- aluminum
- bath
- iron
- manufacture
- 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
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title description 19
- 229910052742 iron Inorganic materials 0.000 title description 10
- 238000004519 manufacturing process Methods 0.000 title description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 14
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 12
- 229910052725 zinc Inorganic materials 0.000 description 12
- 239000011701 zinc Substances 0.000 description 12
- 229910052782 aluminium Inorganic materials 0.000 description 11
- 238000000034 method Methods 0.000 description 11
- 229910045601 alloy Inorganic materials 0.000 description 6
- 239000000956 alloy Substances 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 229910001297 Zn alloy Inorganic materials 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 4
- 238000005246 galvanizing Methods 0.000 description 4
- 238000007792 addition Methods 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 206010001052 Acute respiratory distress syndrome Diseases 0.000 description 1
- 230000001464 adherent effect Effects 0.000 description 1
- 201000000028 adult respiratory distress syndrome Diseases 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
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
- C23C2/06—Zinc or cadmium 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
- 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
- Y10S428/941—Solid state alloying, e.g. diffusion, to disappearance of an original layer
Description
UNITED STATES PATENT OFFICE.
JOSEPH \VILLIAM RIOHARDS,. OF PHILADELPHIA, PENNSYLVANIA.
MANUFACTURE OF GALVANIZED IRON.
SPECIFICATION forming part of Letters Patent No. 456,204, dated July 21', 1891.
Application filed September 27, 1890. Serial No. 366,358. ($pecimens.)
To an whom it may concern:
Be it known that I, J osnrn WILLIAM Bron- ARDS, of Philadelphia, in the State of Pennsylvania, have invented certain new and useful Improvements in the Manufacture of Galvanized Iron, whereof the following is aspecification.
My improvements relate to the process of coating iron with zinc in the manner which is commercially called galvanizing As is well known, the ordinary method of galvanizing sheet or other iron consists in dipping it into a bath of melted zinc and allowing it to remain until a layer of zinc of the desired thickness has been deposited thereon andadheres thereto. I have discovered that by the diffusion of a very small percentage of metallic aluminum throughout the bath of melted zinc a much more uniform deposit upon the sheet-iron can be effected, and, moreover, that, as compared with previously-known products, the coating is highly crystalline and permanently brilliant, while at the same time being exceedingly malleable and tenacious, as well as strongly adherent to the iron.
For the conduct of my process in its pre-. ferred form I proceed as follows: As the quantity of aluminum required is very small, its diffusion throughout a large bath might be found practically difficult were it used alone or in a pure form. I therefore first form an alumino-zinc alloy by melting in a suitable crucible, say, two per cent. of metallic aluminum and adding thereto ninetyeight per cent. of metallic zinc. WVhen thoroughly combined, the alloy thus formed is cast into small bars for convenience in use. The zinc in this alloy is, however, merely a vehicle for the aluminum contained therein to permit its more ready diffusion throughout the galvanizing-bath, and said alloy is not to be understood as being aproduct of my process, nor is its use essential to the same. Having prepared the galvanizing-bath in theusual manner by melting a sufficient quantity of zinc, I add the alumino-zinc alloy just described thereto, preferably in the quantity of about four ounces of alloy to the ton of melted zinc in the bath, and after allowing a few minutes for diffusion of aluminum throughout the bath I dip the sheet or other iron which is to be galvanized in the ordinary manner. As
the bath is depleted and new additions of zinc are made thereto the alumino -zinc alloy should be added in the same proportions as before. I find that the crystalline formation of the deposited zinc varies with the amount of aluminum in the bath, the size of said crystals increasing (up to a certain limit) with the increased percentage of aluminum; but irrespective of the differences in degree which results from the use of a greater or less percentage of aluminum the advantageous qualities above described as incident to such use will result from the conduct of the galvanizing process in the presence of aluminum in any substantial quantity. Hence I do not limit my claim to the use of the above-mentioned proportions.
It must be understood that my invention does not necessarily involve the deposit of an alumino-zinc alloy recognizable as such in the final product, and I do not wish to be understood as limiting myself to a process which yields such an alloyed coating. Hence in using the Words alumino-galvanizing as a convenient term to describe the process I do not intend that the coating must essentially be a recognizable alloy, but merely that it possesses the characteristics due to deposit in the presence of aluminum.
Furthermore, though I have described the use of a vehicle orprimary alloy of aluminum and zinc as the best method known to me of diffusing the aluminum throughout the galvanizing-bath, I do not mean to restrict my claim to the use of a Vehicle for this purpose, since any method of addition which effectually diifuses the metallic'aluminum through out the bath would be the equivalent of the described process.
I claim The hereinbefore-described process of alumino-galv'anizing iron, which consists indiffusing metallic aluminum throughout a bath of metallic zinc and then dipping the iron in said composite bathand permitting the coating to deposit thereon, substantially as set forth.
JOSEPH WILLIAM RICHARDS.
Witnesses:
JAMES H. BELL,
.E. REESE.
Publications (1)
Publication Number | Publication Date |
---|---|
US456204A true US456204A (en) | 1891-07-21 |
Family
ID=2525081
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US456204D Expired - Lifetime US456204A (en) | Manufacture of galvanized iron |
Country Status (1)
Country | Link |
---|---|
US (1) | US456204A (en) |
-
0
- US US456204D patent/US456204A/en not_active Expired - Lifetime
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