GB657392A - Electrical method for protecting metal surfaces from corrosion and formation of incrustations - Google Patents
Electrical method for protecting metal surfaces from corrosion and formation of incrustationsInfo
- Publication number
- GB657392A GB657392A GB4786/49A GB478649A GB657392A GB 657392 A GB657392 A GB 657392A GB 4786/49 A GB4786/49 A GB 4786/49A GB 478649 A GB478649 A GB 478649A GB 657392 A GB657392 A GB 657392A
- Authority
- GB
- United Kingdom
- Prior art keywords
- vessel
- electrode
- potential
- circuit
- feb
- 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
- C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Prevention Of Electric Corrosion (AREA)
Abstract
657,392. Preventing corrosion. HAJOSI, C. A. Feb. 22, 1949, No. 4786. Convention date, Feb. 17, 1949. [A Specification was laid open to inspection under Sect. 91 of the Acts, Aug. 25, 1949]. Drawings to Specification. [Class 123(i)] An electric method of preventing and removing scale comprises applying a periodically varying potential across the wall of the vessel to be protected and an element, e.g. an insulated electrode, in electrical contact with the liquid in the vessel. During the intervals separating two peak values the potential is lower than the counter e.m.f. of the cell (formed by the vessel, the liquid, and the electrode), and the wall of the vessel is always negative with respect to the electrode,' except when the potential difference equals zero. Three circuits are described as suitable for producing appropriate wave forms, viz:- (a) a rectifier circuit, (b) a relaxation oscillator using a neon tube, and (c) a frequency modulation circuit, the potential to the vessel and electrode being taken out of the anode circuit of the valve. In this third circuit the frequency of the pulses varies cyclically, it being constant in the other two. In the last two cases the pulsating voltage may be superimposed on a steady voltage, and should always preferably be rich in harmonics.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR657392X | 1949-02-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB657392A true GB657392A (en) | 1951-09-19 |
Family
ID=9008399
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4786/49A Expired GB657392A (en) | 1949-02-17 | 1949-02-22 | Electrical method for protecting metal surfaces from corrosion and formation of incrustations |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB657392A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3056738A (en) * | 1959-02-02 | 1962-10-02 | Harry C Fischer | Impressed current cathodic protection system |
| US3201335A (en) * | 1962-02-08 | 1965-08-17 | Shell Oil Co | Corrosion protection |
| US3242064A (en) * | 1960-02-29 | 1966-03-22 | Engelhard Ind Inc | Cathodic protection system |
| US3412005A (en) * | 1963-01-18 | 1968-11-19 | Beer Ernst | Apparatus for cathodic protection |
-
1949
- 1949-02-22 GB GB4786/49A patent/GB657392A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3056738A (en) * | 1959-02-02 | 1962-10-02 | Harry C Fischer | Impressed current cathodic protection system |
| US3242064A (en) * | 1960-02-29 | 1966-03-22 | Engelhard Ind Inc | Cathodic protection system |
| US3201335A (en) * | 1962-02-08 | 1965-08-17 | Shell Oil Co | Corrosion protection |
| US3412005A (en) * | 1963-01-18 | 1968-11-19 | Beer Ernst | Apparatus for cathodic protection |
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