GB813994A - Protective treatment of zinc surfaces - Google Patents
Protective treatment of zinc surfacesInfo
- Publication number
- GB813994A GB813994A GB3016855A GB3016855A GB813994A GB 813994 A GB813994 A GB 813994A GB 3016855 A GB3016855 A GB 3016855A GB 3016855 A GB3016855 A GB 3016855A GB 813994 A GB813994 A GB 813994A
- Authority
- GB
- United Kingdom
- Prior art keywords
- zinc
- treatment
- anodizing
- alkali metal
- solution
- 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
Links
- HCHKCACWOHOZIP-UHFFFAOYSA-N zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title abstract 6
- 229910052725 zinc Inorganic materials 0.000 title abstract 6
- 239000011701 zinc Substances 0.000 title abstract 6
- 230000001681 protective Effects 0.000 title abstract 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 abstract 12
- 238000007743 anodising Methods 0.000 abstract 7
- 239000000243 solution Substances 0.000 abstract 7
- 229910052783 alkali metal Inorganic materials 0.000 abstract 6
- -1 alkali metal salt Chemical class 0.000 abstract 4
- 239000011780 sodium chloride Substances 0.000 abstract 4
- 235000011121 sodium hydroxide Nutrition 0.000 abstract 4
- NTHWMYGWWRZVTN-UHFFFAOYSA-N Sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 abstract 3
- 239000002253 acid Substances 0.000 abstract 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 abstract 3
- 230000000630 rising Effects 0.000 abstract 3
- 150000003751 zinc Chemical class 0.000 abstract 3
- KDYFGRWQOYBRFD-UHFFFAOYSA-N Succinic acid Chemical compound OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 abstract 2
- 229910001297 Zn alloy Inorganic materials 0.000 abstract 2
- 150000001340 alkali metals Chemical class 0.000 abstract 2
- 229910052784 alkaline earth metal Inorganic materials 0.000 abstract 2
- 239000007864 aqueous solution Substances 0.000 abstract 2
- 238000000034 method Methods 0.000 abstract 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 abstract 2
- KGBXLFKZBHKPEV-UHFFFAOYSA-N Boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 abstract 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N Carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 abstract 1
- 229910000861 Mg alloy Inorganic materials 0.000 abstract 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N Silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 abstract 1
- 239000004115 Sodium Silicate Substances 0.000 abstract 1
- 229910052910 alkali metal silicate Inorganic materials 0.000 abstract 1
- 150000001342 alkaline earth metals Chemical class 0.000 abstract 1
- 229910045601 alloy Inorganic materials 0.000 abstract 1
- 239000000956 alloy Substances 0.000 abstract 1
- REDXJYDRNCIFBQ-UHFFFAOYSA-N aluminium(3+) Chemical class [Al+3] REDXJYDRNCIFBQ-UHFFFAOYSA-N 0.000 abstract 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 abstract 1
- 239000002585 base Substances 0.000 abstract 1
- 238000009835 boiling Methods 0.000 abstract 1
- 239000004327 boric acid Substances 0.000 abstract 1
- 239000003518 caustics Substances 0.000 abstract 1
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxyl anion Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000006011 modification reaction Methods 0.000 abstract 1
- 235000006408 oxalic acid Nutrition 0.000 abstract 1
- 235000019353 potassium silicate Nutrition 0.000 abstract 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N silicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 abstract 1
- 239000001187 sodium carbonate Substances 0.000 abstract 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 abstract 1
- 229910000029 sodium carbonate Inorganic materials 0.000 abstract 1
- 229910052911 sodium silicate Inorganic materials 0.000 abstract 1
- 235000010339 sodium tetraborate Nutrition 0.000 abstract 1
- 239000001384 succinic acid Substances 0.000 abstract 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 abstract 1
- BSVBQGMMJUBVOD-UHFFFAOYSA-N trisodium borate Chemical compound [Na+].[Na+].[Na+].[O-]B([O-])[O-] BSVBQGMMJUBVOD-UHFFFAOYSA-N 0.000 abstract 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
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/34—Anodisation of metals or alloys not provided for in groups C25D11/04 - C25D11/32
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
813,994. Anodizing zinc and zinc alloys. BRITISH NON-FERROUS METALS RESEARCH ASSOCIATION. Jan. 17, 1957 [Oct. 21, 1955], No. 30168/55. Class 41. A protective surface coating is formed on zinc or zinc alloy by anodizing at 10 to 300 volts in a dilute aqueous solution of an oxide or hydroxide of an alkali metal or alkaline earth metal or of ammonia together with at least one alkali metal salt of an acid which forms a sparingly soluble or insoluble zinc salt, e.g. carbonic, silicic, boric, phosphoric, oxalic, or succinic acid, this first treatment being followed by a second treatment at elevated temperature and pressure, e.g. 150‹ C. and 50 1b./sq. inch, with a dilute solution of an alkali metal silicate and optionally of an alkali metal salt of another acid which forms a sparingly soluble or insoluble zinc salt. In a modification, the anodizing treatment is repeated substituting for the alkali metal salt used in the first treatment an alkali metal salt of a different acid which forms a sparingly soluble zinc salt, followed if desired by the said second treatment at elevated temperature and pressure. In examples zinc is anodized in a caustic soda-sodium carbonate solution at an applied potential rising from 15 to 110 volts and is then autoclaved in a sodium silicate solution made alkaline with caustic soda; for diecast zinc-base alloy the treatment is similar but the water-glass autoclaving solution contains no caustic soda; while in the modified process omitting the autoclaving treatment, for pure zinc a second anodizing is effected in a solution of sodium borate, water glass and caustic soda at a voltage rising rapidly to 120 volts and then more slowly to 200 volts with accompanying sparking, while for a zinc base-aluminium-magnesium alloy the second anodizing is effected at a voltage rising to 230 volts in a similar solution containing less caustic soda. The Provisional Specification describes also processes in which after the first anodizing treatment the treated surface is boiled in a dilute aqueous solution of an alkali metal, alkali earth metal, or ammonium silicate, sulphide, or chromate, followed if desired by stoving at atmospheric pressure. Similar solutions may be used for a second anodizing treatment or for the autoclaving treatment.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DENDAT1048758D DE1048758B (en) | 1955-10-21 | ||
| FR1162696D FR1162696A (en) | 1955-10-21 | 1956-10-18 | Protective treatment of zinc surfaces |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB813994A true GB813994A (en) | 1959-05-27 |
Family
ID=1741958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3016855A Expired GB813994A (en) | 1955-10-21 | 1955-10-21 | Protective treatment of zinc surfaces |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB813994A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3375179A (en) * | 1964-10-29 | 1968-03-26 | Litton Systems Inc | Method of anodizing beryllium and product thereof |
-
1955
- 1955-10-21 GB GB3016855A patent/GB813994A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3375179A (en) * | 1964-10-29 | 1968-03-26 | Litton Systems Inc | Method of anodizing beryllium and product thereof |
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