JPS54105596A - Electrochemical assessing method of local corrosiveness on matal surrface - Google Patents
Electrochemical assessing method of local corrosiveness on matal surrfaceInfo
- Publication number
- JPS54105596A JPS54105596A JP1192378A JP1192378A JPS54105596A JP S54105596 A JPS54105596 A JP S54105596A JP 1192378 A JP1192378 A JP 1192378A JP 1192378 A JP1192378 A JP 1192378A JP S54105596 A JPS54105596 A JP S54105596A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- current
- metal piece
- electrodes
- corrosion
- 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.)
- Granted
Links
Landscapes
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
PURPOSE: To detect the position of corrosion point and the current flowing in the corrosion point only at high precision and at high speed, without requiring complicated pretreatment, by providing a specific electrode for measuring corrosion opposedly and closely to the surface of the metal to be measured, and moving this electrode.
CONSTITUTION: A probe electrode 21 is surrounded with a guard electrode 23, and they are met at the flush end. The electrode 21, by way of a current detecting device 22, is connected to the negative side output terminal of a power source 24, together with the electrode 23. When a current runs, the potential between the electrodes 21 and 23 differs by the portion of the voltage drop due to the device 22, but this potential difference is small as compared with the voltage applied to the metal piece being tested 25 and electrodes 21, 23, and, hence, may be regarded as same potential level. Therefore, the stream line of the current in the electrolyte 30 positioned between the metal piece 25 and electrodes 21, 23 resembles a stream line group 31, and the current from the part opposing to the electrode 21 on the metal piece 25 corresponding to the area of the electrode 21 flows into the electrode 21, so that the local phenomenon of the metal piece 25 may be detected.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1192378A JPS54105596A (en) | 1978-02-07 | 1978-02-07 | Electrochemical assessing method of local corrosiveness on matal surrface |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1192378A JPS54105596A (en) | 1978-02-07 | 1978-02-07 | Electrochemical assessing method of local corrosiveness on matal surrface |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54105596A true JPS54105596A (en) | 1979-08-18 |
JPS6129457B2 JPS6129457B2 (en) | 1986-07-07 |
Family
ID=11791198
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1192378A Granted JPS54105596A (en) | 1978-02-07 | 1978-02-07 | Electrochemical assessing method of local corrosiveness on matal surrface |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54105596A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54153700A (en) * | 1978-05-24 | 1979-12-04 | Toshiba Corp | Discontinuity measuring apparatus of metal surface condition |
US4401941A (en) * | 1981-12-04 | 1983-08-30 | William E. Cunningham | Flange and casing checking instrument |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5482288A (en) * | 1977-12-14 | 1979-06-30 | Toshiba Corp | Measuring apparatus of local corrosion susceptibility |
-
1978
- 1978-02-07 JP JP1192378A patent/JPS54105596A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5482288A (en) * | 1977-12-14 | 1979-06-30 | Toshiba Corp | Measuring apparatus of local corrosion susceptibility |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54153700A (en) * | 1978-05-24 | 1979-12-04 | Toshiba Corp | Discontinuity measuring apparatus of metal surface condition |
US4401941A (en) * | 1981-12-04 | 1983-08-30 | William E. Cunningham | Flange and casing checking instrument |
Also Published As
Publication number | Publication date |
---|---|
JPS6129457B2 (en) | 1986-07-07 |
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