US2282350A - Electrolyte for and method of polishing metal surfaces anodically - Google Patents
Electrolyte for and method of polishing metal surfaces anodically Download PDFInfo
- Publication number
- US2282350A US2282350A US290787A US29078739A US2282350A US 2282350 A US2282350 A US 2282350A US 290787 A US290787 A US 290787A US 29078739 A US29078739 A US 29078739A US 2282350 A US2282350 A US 2282350A
- Authority
- US
- United States
- Prior art keywords
- electrolyte
- metals
- water
- acid
- arsenic
- 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 title description 35
- 239000002184 metal Substances 0.000 title description 35
- 239000003792 electrolyte Substances 0.000 title description 25
- 238000007517 polishing process Methods 0.000 title 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 22
- 150000002739 metals Chemical class 0.000 description 19
- DJHGAFSJWGLOIV-UHFFFAOYSA-N Arsenic acid Chemical compound O[As](O)(O)=O DJHGAFSJWGLOIV-UHFFFAOYSA-N 0.000 description 17
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 13
- 235000011149 sulphuric acid Nutrition 0.000 description 13
- 239000001117 sulphuric acid Substances 0.000 description 13
- 229940000488 arsenic acid Drugs 0.000 description 11
- 230000000694 effects Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 239000000203 mixture Substances 0.000 description 7
- 238000005498 polishing Methods 0.000 description 7
- 239000002253 acid Substances 0.000 description 6
- 239000007864 aqueous solution Substances 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 230000001464 adherent effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229940000489 arsenate Drugs 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F3/00—Electrolytic etching or polishing
- C25F3/16—Polishing
- C25F3/22—Polishing of heavy metals
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F3/00—Electrolytic etching or polishing
- C25F3/16—Polishing
Definitions
- This invention relates to'an electrolyte for and to a method of finishing metal surfaces anodically. More particularly the invention relates to the anodic treatment of metals in an aqueous electrolyte containing sulphuric acid and arsenic acid to impart to the surface of the metal a lustrous, mirror-like polish.
- an electrolyte comprising sulphuric and arsenic acids can be satisfactorily employed in the anodic treatment of various metals and alloys to impart to the surfaces thereof the desired type of finish.
- an electrolyte is employed for imparting a lustrous, mirror-like surface, but its use is not limited to that purpose alone.
- a method to which this invention pertains involves making the metals to be treated an anode in an electrolytic bath of suitable composition and passing a current therethrough of suflicient density and for a suflicient length of time to produce the desired type of surface finish, which, more specifically, may be a high lustrous or mirror-like polish.
- the electrolyte that I have found to possess the most general applicability comprises a mixture of sulphuric and arsenic acids, or sulphuric acid and a compound furnishing arsenate radicals in solution.
- the combined acid concentration should be at least 50% by weight of the solution, but if it is desired to obtain the highest degree of polish, the minimum combined acid concentration should be not less than by weight.
- the sulphuric acid should be present within the proportions of from 5 to 60% and the arsenic acid within the proportions of from 5 to the balance being largely water; All proportions are expressed as percentages by weight.
- anode current densities varying from 50 to 1,000 amperes per square foot may be employed, depending upon the type of surface treatment that is desired. Higher current densities than indicated by the foregoing range may also be employed, but in that case the higher current cost offsets the saving in time.
- the length of time to effect the desired results depends upon the magnitude of the current density employed, and to some extent upon the particular metals undergoing treatment and the character 'of their surfaces initially. Rough surfaces, of course, require a longer time to polish than relatively smooth ones.
- the temperature at which the anodic treatment is carried out while preferably between 50 and 75 C., may be varied from around room temperature to temperatures only slightly underthe boiling point of water.
- An electrolyte for use in the anodic polishing of metals comprising an aqueous solution of sulphuric acid and ortho-arsenic acid, the combined acid concentration being at least 50% by weight and the balance being largely water.
- An electrolyte for use in the anodic polishing of metals comprising an aqueous solution of sulphuric and arsenic acids, the sulphuric acid being present in an amount between 5 and 60% by weight and the arsenic acid being present in an amount between 5 and 90%, the combined acid concentration being at least 75% by weight and the balance being largely water.
- An electrolyte for use in the anodic polishing of metals comprising an aqueous solution of about 36% sulphuric acid, 47% arsenic acid and 17% water by weight.
- An electrolyte for usein'the anodic polishing of metals comprising an aqueous solution or about sulphuric acid, 69% arsenic acid and 6% water by weight.
- An electrolyte for use in the anodic polishing of metals comprising an aqueous solution of about 10% sulphuric acid, 77% arsenic acid and 13% water by weight.
- the method of anodlcally polishing metals which comprises making a metal article the anode in an aqueous electrolyte of sulfuric and arsenic acids the combined acid concentration being at least and the balance being largely water and passing an electric current therethrough of suflicient density and for a suflicient length of time to effect a polish.
- I which comprises making a metal the anode in an electrolyte comprising from 5 to of sulphuric acid, from 5 to 90% of arsenic acid, the combined acid concentration being at least and the balance being largely water, and passing a current therethrough of sufficient density and for a sumcient length of time to effect a polish on said metal surface.
- the method of electropolishing metals which comprises making a metal the anode in an electrolyte comprising about 36% of sulphuric acid, and about 47% .of arsenic acid, the balance being largely water, and passing a current therethrough of sufficient density and for a suflicient length of time to effect a polish on said metal surface.
- the method of electropolishing metals which comprises making a metal the anode in an electrolyte comprising about 25% of sulphuric acid, and about 69% of arsenic acid, the balance being largely water, and passing a current therethrough of sufficient density and for a suflicient length of time to effect a polish on said metal surface.
- the method of electropolishing metals which comprises making a metal the anode in anelectrolyte comprising about 10% of sulphuric acid, and about 77 of arsenic acid, the balance being largely water, and passing a current therethrough of suflicient density and for a suflicient length of time to effect a polish on said metal surface.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- ing And Chemical Polishing (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Electrolytic Production Of Metals (AREA)
Priority Applications (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| LU28823D LU28823A1 (enrdf_load_stackoverflow) | 1939-08-18 | ||
| US290787A US2282350A (en) | 1939-08-18 | 1939-08-18 | Electrolyte for and method of polishing metal surfaces anodically |
| US359936A US2282351A (en) | 1939-08-18 | 1940-10-05 | Electrolyte for and method of polishing metal surfaces anodically |
| GB3910/42A GB552638A (en) | 1939-08-18 | 1942-03-24 | Improvements in or relating to methods of electropolishing metals and aqueous electrolytes suitable for use in such methods |
| FR918756D FR918756A (fr) | 1939-08-18 | 1945-12-12 | électrolyte et procédé pour le polissage anodique de surfaces métalliques |
| CH272840D CH272840A (fr) | 1939-08-18 | 1947-07-28 | Procédé pour le polissage anodique des métaux. |
| BE478069D BE478069A (enrdf_load_stackoverflow) | 1939-08-18 | 1947-12-11 | |
| NL137496A NL69677C (enrdf_load_stackoverflow) | 1939-08-18 | 1947-12-24 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US290787A US2282350A (en) | 1939-08-18 | 1939-08-18 | Electrolyte for and method of polishing metal surfaces anodically |
| US359936A US2282351A (en) | 1939-08-18 | 1940-10-05 | Electrolyte for and method of polishing metal surfaces anodically |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2282350A true US2282350A (en) | 1942-05-12 |
Family
ID=26966417
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US290787A Expired - Lifetime US2282350A (en) | 1939-08-18 | 1939-08-18 | Electrolyte for and method of polishing metal surfaces anodically |
| US359936A Expired - Lifetime US2282351A (en) | 1939-08-18 | 1940-10-05 | Electrolyte for and method of polishing metal surfaces anodically |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US359936A Expired - Lifetime US2282351A (en) | 1939-08-18 | 1940-10-05 | Electrolyte for and method of polishing metal surfaces anodically |
Country Status (7)
| Country | Link |
|---|---|
| US (2) | US2282350A (enrdf_load_stackoverflow) |
| BE (1) | BE478069A (enrdf_load_stackoverflow) |
| CH (1) | CH272840A (enrdf_load_stackoverflow) |
| FR (1) | FR918756A (enrdf_load_stackoverflow) |
| GB (1) | GB552638A (enrdf_load_stackoverflow) |
| LU (1) | LU28823A1 (enrdf_load_stackoverflow) |
| NL (1) | NL69677C (enrdf_load_stackoverflow) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2433441A (en) * | 1947-12-30 | Electrolytic production of thin |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2431986A (en) * | 1942-07-22 | 1947-12-02 | American Rolling Mill Co | Coloring stainless steel |
| US2422903A (en) * | 1944-04-21 | 1947-06-24 | Western Electric Co | Process for electrolytically treating stainless steel articles |
| US3008812A (en) * | 1957-08-20 | 1961-11-14 | Albright & Wilson Mfg Ltd | Method for chemical polishing of copper |
| WO2009041660A1 (ja) | 2007-09-28 | 2009-04-02 | Fujifilm Corporation | 太陽電池用基板および太陽電池 |
| JP4974986B2 (ja) | 2007-09-28 | 2012-07-11 | 富士フイルム株式会社 | 太陽電池用基板および太陽電池 |
| US20100252110A1 (en) | 2007-09-28 | 2010-10-07 | Fujifilm Corporation | Solar cell |
-
0
- LU LU28823D patent/LU28823A1/xx unknown
-
1939
- 1939-08-18 US US290787A patent/US2282350A/en not_active Expired - Lifetime
-
1940
- 1940-10-05 US US359936A patent/US2282351A/en not_active Expired - Lifetime
-
1942
- 1942-03-24 GB GB3910/42A patent/GB552638A/en not_active Expired
-
1945
- 1945-12-12 FR FR918756D patent/FR918756A/fr not_active Expired
-
1947
- 1947-07-28 CH CH272840D patent/CH272840A/fr unknown
- 1947-12-11 BE BE478069D patent/BE478069A/xx unknown
- 1947-12-24 NL NL137496A patent/NL69677C/xx active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2433441A (en) * | 1947-12-30 | Electrolytic production of thin |
Also Published As
| Publication number | Publication date |
|---|---|
| GB552638A (en) | 1943-04-16 |
| FR918756A (fr) | 1947-02-18 |
| LU28823A1 (enrdf_load_stackoverflow) | |
| US2282351A (en) | 1942-05-12 |
| CH272840A (fr) | 1951-01-15 |
| BE478069A (enrdf_load_stackoverflow) | 1948-01-31 |
| NL69677C (enrdf_load_stackoverflow) | 1952-03-15 |
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