US2315696A - Polishing of metal surfaces - Google Patents
Polishing of metal surfaces Download PDFInfo
- Publication number
- US2315696A US2315696A US290493A US29049339A US2315696A US 2315696 A US2315696 A US 2315696A US 290493 A US290493 A US 290493A US 29049339 A US29049339 A US 29049339A US 2315696 A US2315696 A US 2315696A
- Authority
- US
- United States
- Prior art keywords
- acid
- metal
- polishing
- bath
- electrolytic
- 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 25
- 239000002184 metal Substances 0.000 title description 25
- 238000005498 polishing Methods 0.000 title description 9
- VLTRZXGMWDSKGL-UHFFFAOYSA-N perchloric acid Chemical compound OCl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-N 0.000 description 26
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 14
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 11
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 10
- 239000002253 acid Substances 0.000 description 9
- 239000008151 electrolyte solution Substances 0.000 description 9
- 150000002739 metals Chemical class 0.000 description 8
- 229910052759 nickel Inorganic materials 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 229910001220 stainless steel Inorganic materials 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 235000011007 phosphoric acid Nutrition 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 5
- 239000000956 alloy Substances 0.000 description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229910052804 chromium Inorganic materials 0.000 description 4
- 239000011651 chromium Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000002932 luster Substances 0.000 description 4
- -1 nickel metals Chemical class 0.000 description 4
- 239000010956 nickel silver Substances 0.000 description 4
- VLTRZXGMWDSKGL-UHFFFAOYSA-M perchlorate Inorganic materials [O-]Cl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-M 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 229910000975 Carbon steel Inorganic materials 0.000 description 3
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 229910000792 Monel Inorganic materials 0.000 description 2
- 229910000990 Ni alloy Inorganic materials 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- 229910001179 chromel Inorganic materials 0.000 description 2
- FGCGALPUFOSDIE-UHFFFAOYSA-N chromium nickel Chemical compound [Cr][Ni][Cr] FGCGALPUFOSDIE-UHFFFAOYSA-N 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- MPCRDALPQLDDFX-UHFFFAOYSA-L Magnesium perchlorate Chemical compound [Mg+2].[O-]Cl(=O)(=O)=O.[O-]Cl(=O)(=O)=O MPCRDALPQLDDFX-UHFFFAOYSA-L 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 235000019441 ethanol Nutrition 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 150000003016 phosphoric acids Chemical class 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 239000010959 steel Substances 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
Definitions
- This invention relates to an electrolyte for the polishing of metal surfaces and more particularly to an electrolytic solution of an improved composition for use in the anodic treatment of metals to impart thereto a lustrous, mirror-like polish.
- the method to which this invention pertains involves making the metal to be polished an anode in an electrolytic bath of suitable composition and passing a current of sufficient density and for a suillcient length of time to produce a high luster or polish on the metal.
- the electrolytic solution that I have now found to possess a quite general applicability in the electropolishing of ferrous metals, chromium and chrome-nickel steels, nickel and nickel alloys, contains perchloric acid or compounds furnishing the perchlorate radical in effective amounts as an active ingredient of the solution.
- a preferred type of solution is one containing sulfuric acid, ortho phosphoric acid, and perchloric acid, with the balance substantially water.
- the relative proportion of sulfuric acid may be varied from 5% to of phosphoric acid from 5% to 85%, and of perchloric acid (or equivalent perchlorate radical) from 0.1% up to 30%, but in any case the total acid concentration should be at least 50% of the resulting solution.
- the higher cost of electrical energy offsets the saving in time.
- the length of time to effect the desired result depends upon the magnitude of the current densities employed and to some extent upon the particular metal to be polished, as well as the character. of its surface initially. Rough surfaces, of course, require a longer time to polish than relatively smooth ones.
- Example 2 Per cent Ethyl alcohol Perchloric acid 13 Water Substantially the lmlzmuv.
- the bath of Example 2 is suitable for polishing for polishing stainless steel, nickel and low carbon steel when any of these, or articles made threfrom, is subjected to anodic treatment at current densities of around 50 amperes per sq. ft., or higher.
- Example 3 Per cent Acetic acid 82 Magnesium perchlorate 9 Water It will be understood that, instead of adding perchloric acid as such, the acid or the equivalent amount of perchlorate ions may be generated or formed by reaction within the electrolytic bath. Also, where sufliciently soluble in the bath selected, metal perchlorates may be used in place of the free acid. The effect of the addition of perchloric acid or equivalent perchlorate radicals to an electrolytic bath comprising sulfurlc and phosphoric acids is noticeable in the improved luster or polish obtained on the surface of the metal undergoing treatment, as compared with the same sulfuric-phosphoric acid bath without the perchloric acid.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- ing And Chemical Polishing (AREA)
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL68814D NL68814C (enrdf_load_stackoverflow) | 1939-08-16 | ||
| LU28806D LU28806A1 (enrdf_load_stackoverflow) | 1939-08-16 | ||
| BE478065D BE478065A (enrdf_load_stackoverflow) | 1939-08-16 | ||
| US241976A US2315695A (en) | 1938-11-23 | 1938-11-23 | Method of polishing metals |
| US290493A US2315696A (en) | 1939-08-16 | 1939-08-16 | Polishing of metal surfaces |
| CH271945D CH271945A (fr) | 1939-08-16 | 1947-07-30 | Procédé pour le polissage électrolytique des métaux. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US290493A US2315696A (en) | 1939-08-16 | 1939-08-16 | Polishing of metal surfaces |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2315696A true US2315696A (en) | 1943-04-06 |
Family
ID=23116252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US290493A Expired - Lifetime US2315696A (en) | 1938-11-23 | 1939-08-16 | Polishing of metal surfaces |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2315696A (enrdf_load_stackoverflow) |
| BE (1) | BE478065A (enrdf_load_stackoverflow) |
| CH (1) | CH271945A (enrdf_load_stackoverflow) |
| LU (1) | LU28806A1 (enrdf_load_stackoverflow) |
| NL (1) | NL68814C (enrdf_load_stackoverflow) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2440715A (en) * | 1943-07-23 | 1948-05-04 | Battelle Development Corp | Continuous method for electropolishing nickel and nickel-containing alloys |
| US2752304A (en) * | 1950-11-10 | 1956-06-26 | Centre Nat Rech Scient | Electrolytic polishing of metals |
-
0
- LU LU28806D patent/LU28806A1/xx unknown
- NL NL68814D patent/NL68814C/xx active
- BE BE478065D patent/BE478065A/xx unknown
-
1939
- 1939-08-16 US US290493A patent/US2315696A/en not_active Expired - Lifetime
-
1947
- 1947-07-30 CH CH271945D patent/CH271945A/fr unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2440715A (en) * | 1943-07-23 | 1948-05-04 | Battelle Development Corp | Continuous method for electropolishing nickel and nickel-containing alloys |
| US2752304A (en) * | 1950-11-10 | 1956-06-26 | Centre Nat Rech Scient | Electrolytic polishing of metals |
Also Published As
| Publication number | Publication date |
|---|---|
| CH271945A (fr) | 1950-11-30 |
| LU28806A1 (enrdf_load_stackoverflow) | |
| NL68814C (enrdf_load_stackoverflow) | |
| BE478065A (enrdf_load_stackoverflow) |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2315695A (en) | Method of polishing metals | |
| US2662814A (en) | Method and composition for chemically polishing metals | |
| US2334699A (en) | Electrolyte for the polishing of metal surfaces and method of use | |
| US3980539A (en) | Process for electrolytic graining of aluminum | |
| EP0249650B1 (de) | Elektrolyt zum elektrochemischen Polieren von Metalloberflächen | |
| US2918416A (en) | Electrolytic process for hard surfacing aluminum | |
| US2334698A (en) | Polished metal and a method of making the same | |
| US2338321A (en) | Method of electropolishing steel | |
| US2315696A (en) | Polishing of metal surfaces | |
| US2282351A (en) | Electrolyte for and method of polishing metal surfaces anodically | |
| US2347040A (en) | Method of anodically polishing steel | |
| US2366712A (en) | Method of anodically polishing stainless steel | |
| US2411410A (en) | Electropolishing stainless steel | |
| US2429676A (en) | Electrolyte for and method of anodically polishing nickel | |
| US3365377A (en) | Method of sealing anodized aluminum | |
| US2461035A (en) | Electrolytic stainless steel polishing | |
| US2904479A (en) | Electrolytic polishing of zirconium, hafnium and their alloys | |
| US3578570A (en) | Aluminum capacitor foil | |
| US2553937A (en) | Method of electrolytically polishing aluminum and its alloys | |
| US2330170A (en) | Electrolytic polishing of metal | |
| US2613141A (en) | Chemical brightening of aluminum | |
| US3213008A (en) | Electrolytic polishing of stainless steel | |
| US2349843A (en) | Electrolytic treatment of chromium alloys | |
| US3829367A (en) | Electrolytic polishing of metals | |
| US2107318A (en) | White coating on aluminum |