JPS5723851A - Pinhole detecting method for insulating coated film - Google Patents

Pinhole detecting method for insulating coated film

Info

Publication number
JPS5723851A
JPS5723851A JP9822980A JP9822980A JPS5723851A JP S5723851 A JPS5723851 A JP S5723851A JP 9822980 A JP9822980 A JP 9822980A JP 9822980 A JP9822980 A JP 9822980A JP S5723851 A JPS5723851 A JP S5723851A
Authority
JP
Japan
Prior art keywords
pinhole
coating
electrode
ammeter
coated film
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.)
Pending
Application number
JP9822980A
Other languages
Japanese (ja)
Inventor
Yoshio Senoo
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.)
Tokico Ltd
Original Assignee
Tokico 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 Tokico Ltd filed Critical Tokico Ltd
Priority to JP9822980A priority Critical patent/JPS5723851A/en
Publication of JPS5723851A publication Critical patent/JPS5723851A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
    • G01N27/20—Investigating the presence of flaws
    • G01N27/205—Investigating the presence of flaws in insulating materials

Abstract

PURPOSE:To detect a pinhole without damaging a coating by immersing conductive material coated with an insulation in a conductive liquid and by checking conductivity between the conductive material and the conductive liquid. CONSTITUTION:An impeller 22 as conductive material to which an insulating coating was provided is immersed in an aqueous electrolytic solution 24 in a vessel 23. In the aqueous electrolytic solution 24 a counter electrode 25 is provided and an end part 18 and the electrode 25 are connected with a power source 26 and an ammeter 27. In the case where the coated film has a pinhole, the electrode 25 and the end part 18 are shortted through the solution 24, so the ammeter 27 conducts. On the other hand, when the coating has not a pinhole, the electrode 25 and the end part 18 are insulated with the coating, so that ammeter does not conduct. When a test is performed, it is preferable to give ultrasonic vibration in order to remove foam within the pinhole.
JP9822980A 1980-07-18 1980-07-18 Pinhole detecting method for insulating coated film Pending JPS5723851A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9822980A JPS5723851A (en) 1980-07-18 1980-07-18 Pinhole detecting method for insulating coated film

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9822980A JPS5723851A (en) 1980-07-18 1980-07-18 Pinhole detecting method for insulating coated film

Publications (1)

Publication Number Publication Date
JPS5723851A true JPS5723851A (en) 1982-02-08

Family

ID=14214123

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9822980A Pending JPS5723851A (en) 1980-07-18 1980-07-18 Pinhole detecting method for insulating coated film

Country Status (1)

Country Link
JP (1) JPS5723851A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5116551A (en) * 1987-05-07 1992-05-26 Davidson Roderick I Method and apparatus for producing an article by microwave heating
US5457389A (en) * 1985-12-27 1995-10-10 Canon Kabushiki Kaisha Method of testing substrate for liquid jet recording head
KR101694852B1 (en) * 2015-12-01 2017-01-10 한국항공우주연구원 Apparatus for Measuring Heater Resistance

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5457389A (en) * 1985-12-27 1995-10-10 Canon Kabushiki Kaisha Method of testing substrate for liquid jet recording head
US5116551A (en) * 1987-05-07 1992-05-26 Davidson Roderick I Method and apparatus for producing an article by microwave heating
KR101694852B1 (en) * 2015-12-01 2017-01-10 한국항공우주연구원 Apparatus for Measuring Heater Resistance

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