JPS54105596A - Electrochemical assessing method of local corrosiveness on matal surrface - Google Patents

Electrochemical assessing method of local corrosiveness on matal surrface

Info

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
Application number
JP1192378A
Other languages
Japanese (ja)
Other versions
JPS6129457B2 (en
Inventor
Takeshi Kuwabara
Taichi Takechi
Yuichi Sato
Masayuki Suzuki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP1192378A priority Critical patent/JPS54105596A/en
Publication of JPS54105596A publication Critical patent/JPS54105596A/en
Publication of JPS6129457B2 publication Critical patent/JPS6129457B2/ja
Granted legal-status Critical Current

Links

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  • 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
JP1192378A 1978-02-07 1978-02-07 Electrochemical assessing method of local corrosiveness on matal surrface Granted JPS54105596A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5482288A (en) * 1977-12-14 1979-06-30 Toshiba Corp Measuring apparatus of local corrosion susceptibility

Patent Citations (1)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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