US547381A - Robert mcknight - Google Patents
Robert mcknight Download PDFInfo
- Publication number
- US547381A US547381A US547381DA US547381A US 547381 A US547381 A US 547381A US 547381D A US547381D A US 547381DA US 547381 A US547381 A US 547381A
- Authority
- US
- United States
- Prior art keywords
- aluminium
- metal
- coating
- robert
- zinc
- 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
- 229910052751 metal Inorganic materials 0.000 description 27
- 239000002184 metal Substances 0.000 description 27
- 239000004411 aluminium Substances 0.000 description 26
- 229910052782 aluminium Inorganic materials 0.000 description 26
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 26
- 239000011248 coating agent Substances 0.000 description 17
- 238000000576 coating method Methods 0.000 description 17
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 8
- 239000011701 zinc Substances 0.000 description 8
- 229910052725 zinc Inorganic materials 0.000 description 8
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 7
- 229910045601 alloy Inorganic materials 0.000 description 7
- 239000000956 alloy Substances 0.000 description 7
- 229910052718 tin Inorganic materials 0.000 description 7
- 239000011135 tin Substances 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000007598 dipping method Methods 0.000 description 5
- 150000002739 metals Chemical class 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 229910001369 Brass Inorganic materials 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 239000010951 brass Substances 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical class OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 150000002366 halogen compounds Chemical class 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- -1 lead Chemical compound 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 235000011149 sulphuric acid Nutrition 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
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
- C23C2/024—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by cleaning or etching
Definitions
- this metal forming the primary coating being a metal ordinarily fusible at a lower temperature than aluminium and also having an affinity for the metal to be coated, so as to bind the aluminium coating to the same;
- the article which may be of iron, brass, copper, or other metal
- a coat of tin or zinc either as ordinarily done by dipping in the molten tin or zinc, or, when a very thin coating of zinc or copper or when the aluminium coating is to be Very fine
- the plating of the tin or zinc, or tin and zinc may most advantageously be done by electroplating to get a thin and very even coating of these metals.
- the article so coated with zinc or tin is then ordinarily cleansed with a dilute mixture of hydrofluoric and sulphuric acids and dipped into the molten aluminium or its alloy, which dipping can be done either after drying or while still wet from the cleansing.
- a small quantity of any metal that alloys with aluminium, such as lead, may be introduced into the bath.
Description
ROBERT MOKNIGI-IT, OE PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO MATTHEW J. GRIER, OE SAME PLACE.
ART OF COATING METALS WITH ALUMINIUM 0R ALLOYS THEREOF.
SPECIFICATION forming part of Letters Patent No. 543,381, dated. October 1, 1895.
Application filed September 9, 1893. Serial No. 486,141. (No specimens.)
sists in covering the metal to be coated with' the aluminium with a coating of a metal, preferably alloying with the aluminium slightly, and so permitting a coating of the latter to adhere to the metal intended to be the foundation of the plated article, this metal forming the primary coating being a metal ordinarily fusible at a lower temperature than aluminium and also having an affinity for the metal to be coated, so as to bind the aluminium coating to the same;
In the practical carrying out of my invention I first coat the article, which may be of iron, brass, copper, or other metal, with a coat of tin or zinc, either as ordinarily done by dipping in the molten tin or zinc, or, when a very thin coating of zinc or copper or when the aluminium coating is to be Very fine, the plating of the tin or zinc, or tin and zinc may most advantageously be done by electroplating to get a thin and very even coating of these metals. The article so coated with zinc or tin is then ordinarily cleansed with a dilute mixture of hydrofluoric and sulphuric acids and dipped into the molten aluminium or its alloy, which dipping can be done either after drying or while still wet from the cleansing.
I find that while with chemically-clean iron, copper, or brass the aluminium will only alloy and impregnate instead of coatingwith pure aluminium, owing to the fact that the article has to be immersed for sometimes as much as five minutes, yet if such chemically clean brass, copper, iron, or other metal less fusible than aluminium be coated with either tin or zinc the time required for immersion is only a few seconds, and an aluminium coating with little if any alloying is the result. When the aluminium of the bath is not used pure, but
alloyed, a small quantity of any metal that alloys with aluminium, such as lead, may be introduced into the bath.
While I am aware that aluminium has been plated by the use of the salts of zinc or tin, yet such salts are not used by me, and I have found it practically impossible to plate aluminium upon cast-iron by that process, while if the cast-iron be first tinned or galvanized the coating was readily accomplished. I do not, however, consider that any process by which a salt of a metal, which metal is more fusible than aluminium, is reduced and a film of the metal base thereof deposited on the foundation metal before the introduction of the same into the aluminiumbath is outside of my invention.
Having now described my invention, what I claim, and desire to secure by Letters Patent, is-- 1. The process of coating metals with aluminium which consists in coating the foundation metal with a film of a metal more fusible than aluminium, and then dipping the metal thus coated, in the presence of an acid capable of combining with the metallic film, into a bath of molten aluminium or alloy thereof substantially as described.
. 2. The art of coating metals less fusible than aluminium with aluminium, which consists in first covering the same with a coating of a metal fusible at a lower temperature than aluminium and having an affinity for the metal to be coated, then cleansing the coating in an acid bath and then dipping the article thus prepared in a bath of molten aluminium or alloy thereof substantially as described.
3. The art of coating metals with aluminium which consists in coating the foundation metal With a film of a metal more fusible than aluminium and having an affinity for the foundation metal and then treating it with an. acid halogen compound, and dipping the foundation metal into a bath of molten aluminium or alloy thereof substantially as described.
ROBERT MCKNIGIIT.
\Vitnesses:
M. W. CoLLET, ARTHUR J. KERSHAW.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US547381A true US547381A (en) | 1895-10-01 |
Family
ID=2616124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US547381D Expired - Lifetime US547381A (en) | Robert mcknight |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US547381A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2800707A (en) * | 1951-08-04 | 1957-07-30 | Whitfield & Sheshunoff Inc | Aluminum coated ferrous bodies and processes of making them |
| US2872343A (en) * | 1946-03-14 | 1959-02-03 | Lowell D Eubank | Method of protectively coating uranium |
| US4061801A (en) * | 1975-07-19 | 1977-12-06 | Kawasaki Steel Corporation | Method of producing aluminum or aluminum alloy coated steel sheets with aid of powder method |
| US4257549A (en) * | 1978-03-14 | 1981-03-24 | H. H. Robertson Company | Method of making aluminum-base metal clad galvanized steel laminate |
| US4505958A (en) * | 1981-05-22 | 1985-03-19 | Hermann Huster Gmbh & Co. | Method for hot dip galvanizing metallic workpieces |
-
0
- US US547381D patent/US547381A/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2872343A (en) * | 1946-03-14 | 1959-02-03 | Lowell D Eubank | Method of protectively coating uranium |
| US2800707A (en) * | 1951-08-04 | 1957-07-30 | Whitfield & Sheshunoff Inc | Aluminum coated ferrous bodies and processes of making them |
| US4061801A (en) * | 1975-07-19 | 1977-12-06 | Kawasaki Steel Corporation | Method of producing aluminum or aluminum alloy coated steel sheets with aid of powder method |
| US4257549A (en) * | 1978-03-14 | 1981-03-24 | H. H. Robertson Company | Method of making aluminum-base metal clad galvanized steel laminate |
| US4505958A (en) * | 1981-05-22 | 1985-03-19 | Hermann Huster Gmbh & Co. | Method for hot dip galvanizing metallic workpieces |
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