GB1317683A - Process and apparatus for determining the porosity of a dielectric layer coating a metallic surface - Google Patents

Process and apparatus for determining the porosity of a dielectric layer coating a metallic surface

Info

Publication number
GB1317683A
GB1317683A GB2193171A GB2193171A GB1317683A GB 1317683 A GB1317683 A GB 1317683A GB 2193171 A GB2193171 A GB 2193171A GB 2193171 A GB2193171 A GB 2193171A GB 1317683 A GB1317683 A GB 1317683A
Authority
GB
United Kingdom
Prior art keywords
porosity
dielectric layer
metallic surface
pores
varnish
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
Application number
GB2193171A
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.)
Alcan Holdings Switzerland AG
Original Assignee
Alusuisse Holdings AG
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 Alusuisse Holdings AG filed Critical Alusuisse Holdings AG
Publication of GB1317683A publication Critical patent/GB1317683A/en
Expired 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
    • 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
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/416—Systems
    • G01N27/42—Measuring deposition or liberation of materials from an electrolyte; Coulometry, i.e. measuring coulomb-equivalent of material in an electrolyte
    • G01N27/423—Coulometry

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Biochemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Molecular Biology (AREA)
  • Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)

Abstract

1317683 Measuring porosity electrically ALUMINIUM SUISSE SA 19 April 1971 [17 Feb 1970] 21931/71 Heading G1N The porosity of a dielectric layer (e.g. a corrosive protective layer) on a metallic surface e.g. container 8 is determined by covering the layer with an electrolyte containing an electrophoretic varnish and applying an e.m.f. between electrode 2 and the metallic surface 8 to cause electro-deposition of a non-conducting component of the varnish on those parts of the surface 8 adjacent to pores in the dielectric layer. Since the quantity of current consumed is directly proportional to the quantity of material deposited which is, for a given thickness of deposit, proportional to the surface area of the pores, a measure of the quantity of electricity used gives an indication of the porosity of the dielectric layer. Time switch 3 enables the voltage from stabilized source 1 to be applied for 10 secs. and the current consumed during this period measured by means of shunt 4 and integrator 5 including a display device 6. Instead of the metallic surface being a container or flexible or rigid can or tube it may be a planar surface. The varnish may be colored to show the position of the pores.
GB2193171A 1970-02-17 1971-04-19 Process and apparatus for determining the porosity of a dielectric layer coating a metallic surface Expired GB1317683A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH222070A CH520331A (en) 1970-02-17 1970-02-17 Electrochemical process for characterizing the through pores of a dielectric covering a metal surface and device for implementing the process

Publications (1)

Publication Number Publication Date
GB1317683A true GB1317683A (en) 1973-05-23

Family

ID=4228662

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2193171A Expired GB1317683A (en) 1970-02-17 1971-04-19 Process and apparatus for determining the porosity of a dielectric layer coating a metallic surface

Country Status (9)

Country Link
US (1) US3719884A (en)
CH (1) CH520331A (en)
DE (1) DE2106593C3 (en)
DK (1) DK138134B (en)
ES (1) ES388371A1 (en)
FR (1) FR2078581A5 (en)
GB (1) GB1317683A (en)
NL (1) NL155653B (en)
SE (1) SE364364B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103163058A (en) * 2013-03-25 2013-06-19 北京邮电大学 Method for measuring porosity of nickel-base silver cladding by utilizing sulphurous acid steam

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH558012A (en) * 1972-11-15 1975-01-15 Hoffmann La Roche METHOD AND DEVICE FOR ELECTRICALLY DETERMINING DAMAGE TO A LINING.
US3831085A (en) * 1973-04-12 1974-08-20 Hoffmann La Roche Reactor vessel lining testing method and apparatus
CH579272A5 (en) * 1974-03-29 1976-08-31 Pfaudler Werke Ag
US4019129A (en) * 1975-06-02 1977-04-19 Bell Telephone Laboratories, Incorporated Metallic plating testing apparatus
US4010416A (en) * 1975-08-08 1977-03-01 Westinghouse Electric Corporation Method and apparatus for testing dielectric adequacy and for indicating physical defects in a nonconducting material
US4227145A (en) * 1977-10-19 1980-10-07 Bicc Limited Apparatus for detecting faults in electric cables
US4206407A (en) * 1978-08-30 1980-06-03 American Can Company Continuity tester for container linings
JPS5629153A (en) * 1979-08-20 1981-03-23 Toyo Seikan Kaisha Ltd Measuring method of exposed iron part for coated steel plate or its processed product
DE3000446A1 (en) * 1980-01-08 1981-09-10 Bodenseewerk Perkin-Elmer & Co GmbH, 7770 Überlingen METHOD FOR ENRICHING A SEARCHED ELEMENT FROM A SOLUTION FOR THE FLAMELESS ATOMIC ABSORPTION SPECTROSCOPY
US4523141A (en) * 1982-04-16 1985-06-11 The Kendall Company Pipe coating
DE4127740A1 (en) * 1991-08-22 1993-03-04 Klaus Joergens METHOD AND DEVICE FOR CHECKING THE POROSITY OF COATED ITEMS
GB9803678D0 (en) * 1998-02-24 1998-04-15 Crown Cork & Seal Tech Corp Can coating tester
US6248601B1 (en) 1999-04-19 2001-06-19 Taiwan Semiconductor Manufacturing Company Fix the glassivation layer's micro crack point precisely by using electroplating method
US6261852B1 (en) 1999-04-19 2001-07-17 Taiwan Semiconductor Manufacturing Company Check abnormal contact and via holes by electroplating method
US7006546B2 (en) * 2000-03-15 2006-02-28 Komatsu Ltd. Gas laser electrode, laser chamber employing the electrode, and gas laser device
US20030224544A1 (en) * 2001-12-06 2003-12-04 Shipley Company, L.L.C. Test method
US11181462B2 (en) 2018-11-30 2021-11-23 International Business Machines Corporation Non-destructive method to determine porosity in metallic coatings

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2572597A (en) * 1951-01-02 1951-10-23 Gen Electric Porosity tester for coating materials
US3252155A (en) * 1962-05-18 1966-05-17 American Potash & Chem Corp Liquid receptacle and method for preparing same
US3366554A (en) * 1964-01-06 1968-01-30 Boeing Co Method for evaluating coating discontinuities
US3384556A (en) * 1964-11-23 1968-05-21 Sperry Rand Corp Method of electrolytically detecting imperfections in oxide passivation layers
US3385777A (en) * 1964-12-30 1968-05-28 Shell Oil Co Electrochemical deposition of organic films
CH501224A (en) * 1968-01-24 1970-12-31 Pfaudler Werke Ag Method for the electrical detection of damage to an enamel layer of an enamelled apparatus
US3556972A (en) * 1968-09-05 1971-01-19 Dow Chemical Co Depositing a polymer from an emulsion by electrophoresis

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103163058A (en) * 2013-03-25 2013-06-19 北京邮电大学 Method for measuring porosity of nickel-base silver cladding by utilizing sulphurous acid steam

Also Published As

Publication number Publication date
DE2106593C3 (en) 1979-01-18
ES388371A1 (en) 1973-05-01
DK138134C (en) 1978-12-11
FR2078581A5 (en) 1971-11-05
NL155653B (en) 1978-01-16
CH520331A (en) 1972-03-15
SE364364B (en) 1974-02-18
NL7102128A (en) 1971-08-19
US3719884A (en) 1973-03-06
DE2106593B2 (en) 1978-05-18
DE2106593A1 (en) 1971-08-26
DK138134B (en) 1978-07-17

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee