IE792160L - Low concentration trivalent chromium electroplating¹solution. - Google Patents
Low concentration trivalent chromium electroplating¹solution.Info
- Publication number
- IE792160L IE792160L IE792160A IE216079A IE792160L IE 792160 L IE792160 L IE 792160L IE 792160 A IE792160 A IE 792160A IE 216079 A IE216079 A IE 216079A IE 792160 L IE792160 L IE 792160L
- Authority
- IE
- Ireland
- Prior art keywords
- pref
- concn
- bright
- coatings
- low concentration
- Prior art date
Links
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title 1
- 229910052804 chromium Inorganic materials 0.000 title 1
- 239000011651 chromium Substances 0.000 title 1
- 238000000576 coating method Methods 0.000 abstract 4
- CKLJMWTZIZZHCS-REOHCLBHSA-N L-aspartic acid Chemical compound OC(=O)[C@@H](N)CC(O)=O CKLJMWTZIZZHCS-REOHCLBHSA-N 0.000 abstract 1
- ZMZDMBWJUHKJPS-UHFFFAOYSA-M Thiocyanate anion Chemical compound [S-]C#N ZMZDMBWJUHKJPS-UHFFFAOYSA-M 0.000 abstract 1
- 235000001014 amino acid Nutrition 0.000 abstract 1
- 150000001413 amino acids Chemical class 0.000 abstract 1
- 235000003704 aspartic acid Nutrition 0.000 abstract 1
- OQFSQFPPLPISGP-UHFFFAOYSA-N beta-carboxyaspartic acid Natural products OC(=O)C(N)C(C(O)=O)C(O)=O OQFSQFPPLPISGP-UHFFFAOYSA-N 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 abstract 1
- 230000001427 coherent effect Effects 0.000 abstract 1
- ZMZDMBWJUHKJPS-UHFFFAOYSA-N hydrogen thiocyanate Natural products SC#N ZMZDMBWJUHKJPS-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
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/04—Electroplating: Baths therefor from solutions of chromium
- C25D3/06—Electroplating: Baths therefor from solutions of chromium from solutions of trivalent chromium
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)
Abstract
The Cr concn. is 0.03M and is sufficiently weak to give a deposit whose colour is at least as bright as that of vapour deposited Cr. Bright Cr coatings can be formed (without the attendant problems of using Cr6+ baths) for decorative applications, and thick, coherent, smooth coatings can be formed for structural and mechanical applications. The ratio of the molar concns. of Cr/thiocyanate is pref. 1 : 2-4. The soln. pref. also contains an amino-acid (pref. aspartic acid) as buffer, in a molar concn. 1.25 times that of Cr. The bath temp. for a bright coating is pref. 40-60 degrees C, the brightest coloured coatings being formed using a current density >50 mA/cm2. The Cr concn. is pref. =0.02M. The pH of the bath is pref. 3.8 - 4.5.
[DE2944142A1]
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7844177A GB2033427B (en) | 1978-11-11 | 1978-11-11 | Chromium electroplating |
| GB7922791A GB2051861B (en) | 1979-06-29 | 1979-06-29 | Deposition of thick chromium films from trivalent chromium plating solutions |
| GB7932300A GB2038361B (en) | 1978-11-11 | 1979-09-18 | Trivalent chromium plating bath |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IE792160L true IE792160L (en) | 1980-05-11 |
| IE49204B1 IE49204B1 (en) | 1985-08-21 |
Family
ID=27260618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IE2160/79A IE49204B1 (en) | 1978-11-11 | 1979-11-09 | Low concentration trivalent chromium electroplating solution and process |
Country Status (6)
| Country | Link |
|---|---|
| AT (1) | AT370782B (en) |
| DE (1) | DE2944142A1 (en) |
| IE (1) | IE49204B1 (en) |
| IN (1) | IN153802B (en) |
| IT (1) | IT1165359B (en) |
| NL (1) | NL7908159A (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1431639A (en) * | 1974-12-11 | 1976-04-14 | Ibm Uk | Electroplating chromium and its alloys |
| GB1596995A (en) * | 1977-06-14 | 1981-09-03 | Ibm | Electroplating chromium and its alloys |
| GB1571193A (en) * | 1976-12-16 | 1980-07-09 | Ibm Uk | Electroplating chromium and its alloys |
| GB1591051A (en) * | 1977-01-26 | 1981-06-10 | Ibm | Electroplating chromium and its alloys |
-
1979
- 1979-10-03 IN IN699/DEL/79A patent/IN153802B/en unknown
- 1979-11-02 DE DE19792944142 patent/DE2944142A1/en active Granted
- 1979-11-05 AT AT0710279A patent/AT370782B/en not_active IP Right Cessation
- 1979-11-06 IT IT27054/79A patent/IT1165359B/en active
- 1979-11-07 NL NL7908159A patent/NL7908159A/en not_active Application Discontinuation
- 1979-11-09 IE IE2160/79A patent/IE49204B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| NL7908159A (en) | 1980-05-13 |
| ATA710279A (en) | 1982-09-15 |
| DE2944142A1 (en) | 1980-05-29 |
| IN153802B (en) | 1984-08-18 |
| IE49204B1 (en) | 1985-08-21 |
| IT7927054A0 (en) | 1979-11-06 |
| DE2944142C2 (en) | 1990-03-01 |
| AT370782B (en) | 1983-05-10 |
| IT1165359B (en) | 1987-04-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MK9A | Patent expired |