US2250842A - Protection of metal articles against corrosion by coating by electrodeposition - Google Patents
Protection of metal articles against corrosion by coating by electrodeposition Download PDFInfo
- Publication number
- US2250842A US2250842A US213625A US21362538A US2250842A US 2250842 A US2250842 A US 2250842A US 213625 A US213625 A US 213625A US 21362538 A US21362538 A US 21362538A US 2250842 A US2250842 A US 2250842A
- Authority
- US
- United States
- Prior art keywords
- cadmium
- mercury
- zinc
- alloy
- ratio
- 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
- 238000005260 corrosion Methods 0.000 title description 11
- 229910052751 metal Inorganic materials 0.000 title description 11
- 239000002184 metal Substances 0.000 title description 11
- 230000007797 corrosion Effects 0.000 title description 10
- 239000011248 coating agent Substances 0.000 title description 5
- 238000000576 coating method Methods 0.000 title description 5
- 238000004070 electrodeposition Methods 0.000 title description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 27
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 19
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 18
- 229910045601 alloy Inorganic materials 0.000 description 16
- 239000000956 alloy Substances 0.000 description 16
- 229910052753 mercury Inorganic materials 0.000 description 16
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 15
- 229910052793 cadmium Inorganic materials 0.000 description 15
- 229910052725 zinc Inorganic materials 0.000 description 15
- 239000011701 zinc Substances 0.000 description 15
- 235000011121 sodium hydroxide Nutrition 0.000 description 9
- 239000000243 solution Substances 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 239000004411 aluminium Substances 0.000 description 7
- 229910052782 aluminium Inorganic materials 0.000 description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 7
- 229910000925 Cd alloy Inorganic materials 0.000 description 6
- CEKJAYFBQARQNG-UHFFFAOYSA-N cadmium zinc Chemical compound [Zn].[Cd] CEKJAYFBQARQNG-UHFFFAOYSA-N 0.000 description 6
- 238000000151 deposition Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 5
- BUACSMWVFUNQET-UHFFFAOYSA-H dialuminum;trisulfate;hydrate Chemical compound O.[Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O BUACSMWVFUNQET-UHFFFAOYSA-H 0.000 description 5
- 229910021645 metal ion Inorganic materials 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 229920001353 Dextrin Polymers 0.000 description 3
- 229910000645 Hg alloy Inorganic materials 0.000 description 3
- QCUOBSQYDGUHHT-UHFFFAOYSA-L cadmium sulfate Chemical compound [Cd+2].[O-]S([O-])(=O)=O QCUOBSQYDGUHHT-UHFFFAOYSA-L 0.000 description 3
- KXZJHVJKXJLBKO-UHFFFAOYSA-N chembl1408157 Chemical compound N=1C2=CC=CC=C2C(C(=O)O)=CC=1C1=CC=C(O)C=C1 KXZJHVJKXJLBKO-UHFFFAOYSA-N 0.000 description 3
- 229910017052 cobalt Inorganic materials 0.000 description 3
- 239000010941 cobalt Substances 0.000 description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 3
- FYGDTMLNYKFZSV-MRCIVHHJSA-N dextrin Chemical compound O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)OC1O[C@@H]1[C@@H](CO)OC(O[C@@H]2[C@H](O[C@H](O)[C@H](O)[C@H]2O)CO)[C@H](O)[C@H]1O FYGDTMLNYKFZSV-MRCIVHHJSA-N 0.000 description 3
- YVUZUKYBUMROPQ-UHFFFAOYSA-N mercury zinc Chemical compound [Zn].[Hg] YVUZUKYBUMROPQ-UHFFFAOYSA-N 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000001132 aluminium potassium sulphate Substances 0.000 description 2
- 235000011126 aluminium potassium sulphate Nutrition 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- LWJROJCJINYWOX-UHFFFAOYSA-L mercury dichloride Chemical compound Cl[Hg]Cl LWJROJCJINYWOX-UHFFFAOYSA-L 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- LGQLOGILCSXPEA-UHFFFAOYSA-L nickel sulfate Chemical compound [Ni+2].[O-]S([O-])(=O)=O LGQLOGILCSXPEA-UHFFFAOYSA-L 0.000 description 2
- GRLPQNLYRHEGIJ-UHFFFAOYSA-J potassium aluminium sulfate Chemical compound [Al+3].[K+].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O GRLPQNLYRHEGIJ-UHFFFAOYSA-J 0.000 description 2
- 229910002058 ternary alloy Inorganic materials 0.000 description 2
- 229910000497 Amalgam Inorganic materials 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 230000001464 adherent effect Effects 0.000 description 1
- 239000001164 aluminium sulphate Substances 0.000 description 1
- 235000011128 aluminium sulphate Nutrition 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- KTVIXTQDYHMGHF-UHFFFAOYSA-L cobalt(2+) sulfate Chemical compound [Co+2].[O-]S([O-])(=O)=O KTVIXTQDYHMGHF-UHFFFAOYSA-L 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 239000008240 homogeneous mixture Substances 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 1
- 235000009529 zinc sulphate Nutrition 0.000 description 1
- 239000011686 zinc sulphate Substances 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
Definitions
- This invention relates to the protection of metal articles against corrosion, and its principal object is the provision on ferrous and other metal articles of an anti-corrosion surface alloy or coating of great efficacy and durability.
- I provide a process for protecting a metal article against corrosion comprising the electro-deposition of an'alloy con-' taining cadmium and mercury from an alkaline bath containing aluminium in solution 'in addition to the constituents of the alloy.
- the aluminium appears to increase the throwing power of the bath to such an extent that the recesses and interior surfaces of irregularlyshaped and hollow articles are found to be quite uniformly covered without any necessity for special anode shapes or distributions to conform with the particular article to be treated, assuming of course that the article is completely immersed and that no air pockets are allowed to form in it.
- Example I An aqueous solution is made up in a conventional way, if necessary with the aid of heat, containing per gallon of water:
- anode may be cast from a homogeneous mixture or amalgam of zinc, cadmium and mercury.
- Example II Ounces Sodium cyanide 12 Caustic soda 12 Cadmium sulphate 12 Bichloride of mercury A; to 2 Aluminium potassium sulphate' 2 7 Cobalt sulphate M; to 2 Dextrine 2
- Example III Sodium cyanide 12 Caustic soda 12 Cadmium sulphate 12 Bichloride of mercury e to 2 Aluminium potassium sulphate 2 1 Nickel sulphate FA; to 2 Dextrine 2
- the constituents specified in Examples 1 and II are in each case, added to one gallon of water.
- the anode in this case may comprise zinc, cadmium and mercury in the ratio,8:4:1 or- 8:221, the nickel or cobalt being added as a me tallic salt to the solution when required.
- the anode may. comprise cadmium and mercury in the ratio 9:1.
- de-scaling (if necessary) is suspended-in the bath by means of wires or carriers of aluminium.
- the aluminium carrying means maintains the aluminium metal content of the solution during the anodic period and also gives greater conductivity to the circuit leading to the article suspendedj.
- the aluminium carrying memby Letters mium and mercury in which the cadmium zinc ratio is approximately 1 to 1 from an aqueous alkaline cyanide bath containing at least about 12 ounces of caustic soda per gallon of water and against corrosion comprising electrically depositing thereon a ternary preponderatingly cadmium alloy of zinc, cadmium and mercury from an aqueous alkaline cyanide bath containing at least about 12 ounces of caustic soda per gallon of water and containing-aluminum sulphate in solution in addition to the metal ions of the alloy being deposited, and employing an alloy anode containing zinc, cadmium and mercury, the zincmercury ratio of the anode being substantially 8 to 1 and the zinc-cadmium ratio thereof being substantially 2 to 1.
- a process for protecting a metal article against corrosion comprising electrically depositing thereon a ternary alloy containing zinc, cadmium and mercury in which the cadmium-zinc ratio is approximately 1 to 1 from an aqueous alkaline cyanide bath containing at least about 12 ounces of caustic soda per gallon of water and containing aluminum sulphate in solution in addition to the metal ions of the alloy being deposited, and employing an alloy anode containing zinc, cadmium and mercury, the zinc-mercury ratio being about 8 to 1 and the zinc-cadmium ratio thereof being from 2 to 1 to a ratio of 4 to 1.
- a process for protecting a metal article against corrosion comprising electrically depositing thereon a ternary preponderatingly cadmium alloy of zinc, cadmium and mercury from an aqueous alkaline cyanide bath containing at least about 12 ounces of caustic soda per gallon of water and containing aluminum sulphate in solution in addition to the metal ions of the alloy, and employing an alloy anode containing zinc, cadmium and mercury, the zinc-mercury ratio of the anode being substantially 8 to 1 and the zinccadmium ratio thereof being from 2 to 1 to a ratio of 4 to 1.
- a process for protecting a metal article against corrosion comprising electrically depositing thereon a ternary alloy containing zinc, cadmium and mercury in which the cadmium-zinc ratio is approximately 1 to 1 from an aqueous alkaline cyanidebath containing at least about 12 ounces of caustic soda per gallon of water and containing aluminum sulphate in solution in addition to. the metal ions of the alloy being deposited, and employing an alloy anode containing zinc, cadmium and mercury, the zinc-mercury ratio of the anode being about 8 to 1 and the zinccadmium ratio thereof being about 2 to l, the total combined content of the zinc and cadmium in the bath in proportion to the mercury content being substantially in the ratio of 2.5 to 1.
- a process for protecting a metal article against corrosion comprising electrically depositing thereon a ternary preponderatingly cadmium alloy of zinc, cadmium and mercury from an aqueous alkaline cyanide bath containing at least about 12 ounces of caustic soda per gallon of water containing aluminum sulphate in solution in addition to the metal ions of the alloy being deposited, and employing an alloy anode containing zinc, cadmium and mercury, the zincmercury ratio of the anode being substantially 8 to 1 and the zinc-cadmium ratio thereof being substantially 2 to 1, the total combined content of the zinc and cadmium in the bath in proportion to the mercury content being substantially in the ratio of 2.5 to 1.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Prevention Of Electric Corrosion (AREA)
- Electroplating And Plating Baths Therefor (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB20538/37A GB499599A (en) | 1937-07-24 | 1937-07-24 | Improvements relating to the protection of metal articles against corrosion by coating by electro deposition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2250842A true US2250842A (en) | 1941-07-29 |
Family
ID=10147538
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US213625A Expired - Lifetime US2250842A (en) | 1937-07-24 | 1938-06-14 | Protection of metal articles against corrosion by coating by electrodeposition |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2250842A (en)van) |
| BE (1) | BE425035A (en)van) |
| FR (1) | FR825427A (en)van) |
| GB (1) | GB499599A (en)van) |
| NL (1) | NL51391C (en)van) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2793243A (en) * | 1954-10-15 | 1957-05-21 | Rca Corp | Thermoelectric element alloy |
| US2905603A (en) * | 1957-09-04 | 1959-09-22 | American Zinc Inst | Zinc plating |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7559400B2 (en) | 1997-01-31 | 2009-07-14 | Aloha, Llc | Low profile chassis and suspension |
| WO2005039900A2 (en) | 2003-10-24 | 2005-05-06 | Aloha, Llc | Suspensions for low floor vehicles |
-
0
- BE BE425035D patent/BE425035A/xx unknown
- NL NL51391D patent/NL51391C/xx active
-
1937
- 1937-07-24 GB GB20538/37A patent/GB499599A/en not_active Expired
- 1937-08-09 FR FR825427D patent/FR825427A/fr not_active Expired
-
1938
- 1938-06-14 US US213625A patent/US2250842A/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2793243A (en) * | 1954-10-15 | 1957-05-21 | Rca Corp | Thermoelectric element alloy |
| US2905603A (en) * | 1957-09-04 | 1959-09-22 | American Zinc Inst | Zinc plating |
Also Published As
| Publication number | Publication date |
|---|---|
| FR825427A (fr) | 1938-03-03 |
| BE425035A (en)van) | |
| GB499599A (en) | 1939-01-24 |
| NL51391C (en)van) |
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