GB1172882A - Use of Composite D.C. Power in Anodic Protection - Google Patents
Use of Composite D.C. Power in Anodic ProtectionInfo
- Publication number
- GB1172882A GB1172882A GB1399767A GB1399767A GB1172882A GB 1172882 A GB1172882 A GB 1172882A GB 1399767 A GB1399767 A GB 1399767A GB 1399767 A GB1399767 A GB 1399767A GB 1172882 A GB1172882 A GB 1172882A
- Authority
- GB
- United Kingdom
- Prior art keywords
- heater
- members
- potentiostat
- source
- potential
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
- C23F13/005—Anodic protection
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Weting (AREA)
- Devices For Use In Laboratory Experiments (AREA)
Abstract
1,172,882. Automatic control systems for anodic passivation. ESSO RESEARCH & ENG. CO. March 28, 1967, No.13997/67. Heading G3R. An anodic passivation system to prevent corrosion of a bayonet heater 32 immersed in acid 34 comprises a cathode 33, reference electrode 39, a D.C. source 31, a potentiostat 30 and a voltage responsive contactor 42, 44, the settings of members 30, 42 being such that members 30, 31 are parallel connected to supply the current necessary to bring the heater 32 to a potential corresponding to slow or instantaneous passivation, Fig.1 (not shown), after which the contacts 44 open to disconnect the source 31 and the potentiostat 30 supplies the reduced current necessary to maintain the passive condition of the heater 32, i.e. to maintain the potential between members 32, 39 in a predetermined range. The above cycle is repeated should contacts 44 reclose as a result of altered conditions at heater 32, e.g. changes of temperature and solution concentration. The system may be simplified by replacing members 42, 44 by a conventional non-automatic switch, Fig.2 (not shown). A typical application of the invention using a conventional D.C. source and potentiostat is described for steady state (slow) operation to bring the heater into the passive potential range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1399767A GB1172882A (en) | 1967-03-28 | 1967-03-28 | Use of Composite D.C. Power in Anodic Protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1399767A GB1172882A (en) | 1967-03-28 | 1967-03-28 | Use of Composite D.C. Power in Anodic Protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1172882A true GB1172882A (en) | 1969-12-03 |
Family
ID=10033143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1399767A Expired GB1172882A (en) | 1967-03-28 | 1967-03-28 | Use of Composite D.C. Power in Anodic Protection |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1172882A (en) |
-
1967
- 1967-03-28 GB GB1399767A patent/GB1172882A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |