US992600A - Process of treating aluminium articles for the formation of galvanic metallic coatings. - Google Patents
Process of treating aluminium articles for the formation of galvanic metallic coatings. Download PDFInfo
- Publication number
- US992600A US992600A US5856?110A US992600DA US992600A US 992600 A US992600 A US 992600A US 992600D A US992600D A US 992600DA US 992600 A US992600 A US 992600A
- Authority
- US
- United States
- Prior art keywords
- formation
- metallic coatings
- metallic
- articles
- galvanic
- 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
- 238000000576 coating method Methods 0.000 title description 9
- 229910052782 aluminium Inorganic materials 0.000 title description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title description 8
- 239000004411 aluminium Substances 0.000 title description 6
- 238000000034 method Methods 0.000 title description 6
- 230000015572 biosynthetic process Effects 0.000 title description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 5
- 239000011701 zinc Substances 0.000 description 5
- 229910052725 zinc Inorganic materials 0.000 description 5
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 4
- 229910052700 potassium Inorganic materials 0.000 description 4
- 239000011591 potassium Substances 0.000 description 4
- 229910001369 Brass Inorganic materials 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 3
- 239000010951 brass Substances 0.000 description 3
- 230000003750 conditioning effect Effects 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 229940072033 potash Drugs 0.000 description 3
- 235000015320 potassium carbonate Nutrition 0.000 description 3
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 230000001464 adherent effect Effects 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- -1 halogen ion Chemical class 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 235000010265 sodium sulphite Nutrition 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- GTLDTDOJJJZVBW-UHFFFAOYSA-N zinc cyanide Chemical compound [Zn+2].N#[C-].N#[C-] GTLDTDOJJJZVBW-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/56—Electroplating: Baths therefor from solutions of alloys
- C25D3/58—Electroplating: Baths therefor from solutions of alloys containing more than 50% by weight of copper
Definitions
- the present invention relates to an improved process of-formi'ng galvanic metallic coatings on aluminium and consists in preliminarily freeing the aluminium article to be treated from grease or the like, cleaning it and then providing it in a preliminary bathwith a thin film-like coating upon which any desired metallic coating may be deposited in the usual electrolytic baths employed for ordinary metals.
- the essential feature of the present 'invention may be said to consist 1n the fact that the film-like deposit, which forms the .basis for the actual metallic coating to be sililbsequently deposited, consists of a metallic a v- It has been found. thatbyemploying a mean adequate quantity of sulfitebeing added to the bath in order to prevent oxidation of.
- a salt having an alkaline reaction such for example as potash or soda.
- This solution deposits a brass very rich in zinc anda coating of this is less adherent than if the 'alloyis poorer in zinc.
- the precipitated alloy should preferably contain not less than of copper. Now it has been found that-in order to obtain a deposit containing a suffi- -cient percentage of copper it is-necessary to add a small quantity of an alkaline haloid such for example as chlorid of potassium. or
- the anodes may be of brass or of copper and zinc anodes, oronly copper anodes can be used,in which latter case, however, it is frequently necessary to regenerate the. bath and replenish the double zinc cyanid. If the brass is to adhere Well, in the first place it is essential to maintain a suitable voltage. 1
- the voltage depends upon the halogen ion employed. It'must be highest when chlorid is present, say approximately 1.8 volts; bromid requires approximately 1.7 volts; iodid approximately 1.6 volts. It is advisable to have a current strength of from 2 to 3.6 am'peres'per square decimeter.
- riod for the formationof the thin film-like coating-of metallic alloy on the aluminium may amount to from a minute to 2 minutes.
- the article is only exposed to the current in the electrolyte for a period of substantially one minute.
- a process for conditioning aluminum articles for the deposition of metallic coat ings by electrolytic baths which conslsts in treating the article electrolytically 1n a bath comprising an aqueous solution of two or more metallic double-cyanids, and-'a sulfite to prevent oxidation; as set forth.
- a process for conditioning aluminunr articles for the deposition of metallic coatings by electrolytic baths which consists in treating the article electrolytically in a bath comprising an aqueous solutlon -of two or more metallic double-cyanids, and a sulfite to prevent oxidation; by a current of from 1.6 to 1.8 volts, and a current strength of from 2 to 3.6 amperes per square declmeter; as setforth.
- a process for conditioning aluminum articles for thedeposition of metallic Coat ings by electrolytic baths which consists in In testimony whereof, I aflix my signature, treating the article electrolytically in a bath in presence of two witnesses. containing double cy-anid of copper, double CARL RI'FMPLER cyanid of zinc, an alkaline sulfite, and an 5 addition of an alkaline halogen, and of a Witnesses:
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electroplating And Plating Baths Therefor (AREA)
Description
tallic alloy an extremely adherent coating UNITED STATES,
PATENT oFF IoE- CARL RUMPLER, or sononnenne, NEAR BERLIN, G RMANY.
rnoonss or TREATING ALUMINIUM ARTICLES FOR; THE FORMATION or GALVANiC METALLIC COATINGS.
No Drawing.
Specification of Letters Patent.
To all whom it may concern:
Be it known that I, CARL RtiMrLER, merchant, a subject of the King of Prussia, residing at Schoneberg, near Berlin, Germany, have invented certain new and useful Im-' provements in an Improved Process of,
'lieating Aluminium Articles for the Formatlon of Galvanic Metallic Coatings; and
I do hereby declare the following to be a full, clear, and exact description of the in vention, such aslwill' enable others skilled in the art to which it appertains to make and use the same. I The present invention relates to an improved process of-formi'ng galvanic metallic coatings on aluminium and consists in preliminarily freeing the aluminium article to be treated from grease or the like, cleaning it and then providing it in a preliminary bathwith a thin film-like coating upon which any desired metallic coating may be deposited in the usual electrolytic baths employed for ordinary metals.
The essential feature of the present 'invention may be said to consist 1n the fact that the film-like deposit, which forms the .basis for the actual metallic coating to be sililbsequently deposited, consists of a metallic a v- It has been found. thatbyemploying a mean adequate quantity of sulfitebeing added to the bath in order to prevent oxidation of.
the cyanid. It is also advantageous to add to the bath a small quantity of a salt having an alkaline reaction such for example as potash or soda. This solution however deposits a brass very rich in zinc anda coating of this is less adherent than if the 'alloyis poorer in zinc. The precipitated alloy should preferably contain not less than of copper. Now it has been found that-in order to obtain a deposit containing a suffi- -cient percentage of copper it is-necessary to add a small quantity of an alkaline haloid such for example as chlorid of potassium. or
iodid of potassium.
Good results are obtainedv with a preliminary bath of .the following. composition: '1 liter of water. 4060 .of copper. 15-30 gr. of double cyanid of zinc; 108'0 gr. of commercial sodium sulfite; 10-25 gr. potash. 210' gr. fchlo- Patented May 16,1911. Application and October 0, 1910. sem No. 585,681. Y
gr. of double. cyanid rid of potassium. For the double cyanids it is advantageous to employ the respective metallic salts with cyanid of potassium solution until the cyanid deposit formed is dissolved. 1
The anodes may be of brass or of copper and zinc anodes, oronly copper anodes can be used,in which latter case, however, it is frequently necessary to regenerate the. bath and replenish the double zinc cyanid. If the brass is to adhere Well, in the first place it is essential to maintain a suitable voltage. 1
The voltage depends upon the halogen ion employed. It'must be highest when chlorid is present, say approximately 1.8 volts; bromid requires approximately 1.7 volts; iodid approximately 1.6 volts. It is advisable to have a current strength of from 2 to 3.6 am'peres'per square decimeter. The .pe-
riod for the formationof the thin film-like coating-of metallic alloy on the aluminium may amount to from a minute to 2 minutes. Preferably the article is only exposed to the current in the electrolyte for a period of substantially one minute.
Having now particularly described and ascertained the nature of my said invention .and in what manner the same is to be performed, 'I declare that what I claim is 1. A process for conditioning aluminum articles for the deposition of metallic coat ings by electrolytic baths which conslsts in treating the article electrolytically 1n a bath comprising an aqueous solution of two or more metallic double-cyanids, and-'a sulfite to prevent oxidation; as set forth.
2. A process for conditioning aluminunr articles for the deposition of metallic coatings by electrolytic baths which consists in treating the article electrolytically in a bath comprising an aqueous solutlon -of two or more metallic double-cyanids, and a sulfite to prevent oxidation; by a current of from 1.6 to 1.8 volts, and a current strength of from 2 to 3.6 amperes per square declmeter; as setforth.
' 3. A process for conditioning aluminum articles for thedeposition of metallic Coat ings by electrolytic baths which consists in In testimony whereof, I aflix my signature, treating the article electrolytically in a bath in presence of two witnesses. containing double cy-anid of copper, double CARL RI'FMPLER cyanid of zinc, an alkaline sulfite, and an 5 addition of an alkaline halogen, and of a Witnesses:
salt producing an alkaline reaction such-as AN'roN PELSGHING,. potash or soda. AUGUST FUGGER.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US992600TA |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US992600A true US992600A (en) | 1911-05-16 |
Family
ID=3060934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US5856?110A Expired - Lifetime US992600A (en) | Process of treating aluminium articles for the formation of galvanic metallic coatings. |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US992600A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2791553A (en) * | 1956-02-15 | 1957-05-07 | Gen Electric | Method of electroplating aluminum |
-
0
- US US5856?110A patent/US992600A/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2791553A (en) * | 1956-02-15 | 1957-05-07 | Gen Electric | Method of electroplating aluminum |
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