GB933175A - Improvements in an electrophoretic coating process - Google Patents

Improvements in an electrophoretic coating process

Info

Publication number
GB933175A
GB933175A GB4608661A GB4608661A GB933175A GB 933175 A GB933175 A GB 933175A GB 4608661 A GB4608661 A GB 4608661A GB 4608661 A GB4608661 A GB 4608661A GB 933175 A GB933175 A GB 933175A
Authority
GB
United Kingdom
Prior art keywords
article
coating
surface
paint
coated
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
GB4608661A
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.)
Ford Motor Co Ltd
Ford Motor Co
Original Assignee
Ford Motor Co Ltd
Ford Motor Co
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
Priority to US78684A priority Critical patent/US3200057A/en
Application filed by Ford Motor Co Ltd, Ford Motor Co filed Critical Ford Motor Co Ltd
Publication of GB933175A publication Critical patent/GB933175A/en
Application status is Expired legal-status Critical

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25DPROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D13/00Electrophoretic coating characterised by the process
    • C25D13/18Electrophoretic coating characterised by the process using modulated, pulsed, or reversing current

Abstract

933,175. Electrophoretic coating processes. FORD MOTOR CO. Ltd. Dec. 22, 1961 [Dec. 27, 1960], No. 46086/61. Class 41. The conducting surface of an article is electrophoretically coated by contact with an aqueous conducting bath having a dispersion of charged coating material therein, said surface serving as a first electrode, and causing a second electrode to contact said aqueous bath thereby depositing the said colloidal material from the bath on to the surface of said article by establishing an electrical potential between the first and second electrodes. The electrical potential is maintained for at least a substantial part of the deposition process above the value 1.2 to 1.9 volts, at which the electrolysis of water occurs, and the polarity is then reversed between the electrodes to remove the excess of colloidal material from the surface of the article. The process is a method of electrophoretically coating articles to provide a uniform coat of paint on all surfaces. The electrolyte solution comprises emulsified paint particles in a colloidal state dispersed in a conducting-liquid medium. In a mechanized unit in which a further article may constitute a second electrode articles 11 for coating are transported by conveyer 18 to insulating tank 13 containing the electrophoretic coating electrolyte 12; articles 11 are slung from conveyer 18 by paint hook 19 having an electrical insulator 20 to isolate the articles from earth, but fitted with contact plate 21 below insulator 20. Article 11a, for coating, is earthed when its contact plate 21 connects with earthed bus-bar 22. Article 11b, already previously coated, acquires negative polarity when its contact plate 21 contacts bus-bar 23 connected to the negative terminal of power source 17. Electrode 26 is likewise connected to the negative terminal. Colloidal paint particles carrying a negative charge are repelled from the vicinity of the cathodes comprising coated article 11b and electrode 26 and migrate towards the earthed article 11a, acting as anode, to irreversibly deposit an electrophoretic film thereon. Articles 11a and 11b remain submerged until a sufficient paint film is deposited on the surface of article 11a; article 11b is then substantially without undeposited colloidal particles adhering to its coated surface, due to depletion of colloidal particles in the vicinity of the cathode during the coating of the anode. Coated article 11b is then conveyed to oven 24 to cure the deposited paint film; mixer 25 keeps the colloidal material uniformly dispersed. The potential required to rinse colloidal particles away from the coated surface of article 11b is lower than that required to electrophoretically coat the surface of article 11a, and coated article 11b has a relatively high resistance due to its insulating paint coat. A second uncoated electrode 26, acting as supplementary cathode permits the otherwise required potential for coating article 11a to be reduced. For certain formulations of the coating bath wherein the dispersed colloid is positively charged, deposition occurs on an article surface acting as a cathode. The electrical potential applied, substantially above the decomposition potential of waterranges between 50-1000 volts at a current density of 0.1-5.0 amps. per sq. ft. for electrophoretic deposition of a paint coating; for rinsing away colloidal particles adhering to a coated article voltages of 5-1000 volts are mentioned.
GB4608661A 1960-12-27 1961-12-22 Improvements in an electrophoretic coating process Expired GB933175A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US78684A US3200057A (en) 1960-12-27 1960-12-27 Electrophoretic coating process

Publications (1)

Publication Number Publication Date
GB933175A true GB933175A (en) 1963-08-08

Family

ID=22145601

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4608661A Expired GB933175A (en) 1960-12-27 1961-12-22 Improvements in an electrophoretic coating process

Country Status (2)

Country Link
US (1) US3200057A (en)
GB (1) GB933175A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58109569A (en) * 1981-12-22 1983-06-29 Ratsukuberuke Buirufuingu Gmbh Thermosettable cathode electrodeposition composition and manufacture
CN106637355A (en) * 2016-11-25 2017-05-10 北京工业大学 Electrophoretic deposition device and method for preparing film by using electorphoretic deposition method

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1027813A (en) * 1962-02-27 1966-04-27 Goodlass Wall & Co Ltd A process for the deposition of pigmented resinous films on metal objects
NL297540A (en) * 1962-09-10 1900-01-01
GB1050172A (en) * 1963-06-15
US3388052A (en) * 1963-07-01 1968-06-11 Ford Motor Co Method and apparatus for automatically checking electrical condition of workpieces prior to electrocoating process
US3305467A (en) * 1963-07-01 1967-02-21 Ford Motor Co Electrocoating feed control process and apparatus
US3325390A (en) * 1963-07-01 1967-06-13 Ford Motor Co Method and apparatus for electrocoating using an auxiliary electrode
US3418233A (en) * 1963-07-01 1968-12-24 Ford Motor Co Apparatus for electrocoating using an auxiliary electrode
US3402239A (en) * 1963-07-24 1968-09-17 Oak Rubber Co Process for latex dipping
GB1086325A (en) * 1963-07-26 1967-10-11 Goodlass Wall & Co Ltd Process of electrophoretic deposition by means of alternating current
US3355374A (en) * 1963-12-30 1967-11-28 Ford Motor Co Method of electrocoating with variation of electrical inducement
GB1051801A (en) * 1964-01-24
US3335103A (en) * 1964-05-14 1967-08-08 Mobil Oil Corp Dual feed for supplying pigment and resin to emulsion electrodeposition bath
US3403088A (en) * 1964-05-18 1968-09-24 Ppg Industries Inc Electrodeposition of water-dispersed acrylic interpolymers
US3496082A (en) * 1964-10-19 1970-02-17 Ransburg Electro Coating Corp Electrophoretic coating method and apparatus utilizing bath circulation to minimize impurities
US3399126A (en) * 1964-11-02 1968-08-27 Ford Motor Co Electrodeposition process and apparatus having conduit electrodes
US3531390A (en) * 1965-03-17 1970-09-29 Ppg Industries Inc Electrodeposition method
US3476667A (en) * 1966-04-25 1969-11-04 Scm Corp Electrode assembly used in electrocoating hollow articles
US3340172A (en) * 1966-06-28 1967-09-05 Mobil Oil Corp Two phase aqueous emulsion suitable for electrophoretic coating and process for use thereof
US3444066A (en) * 1966-12-07 1969-05-13 Ford Motor Co Method of electrically induced deposition of paint on conductors
US3444065A (en) * 1966-12-07 1969-05-13 Ford Motor Co Method for electrodeposition of paint
CA1258313A (en) * 1983-09-26 1989-08-08 Branimir Simic-Glavaski Molecular electro-optical transistor and switch
US4592816A (en) 1984-09-26 1986-06-03 Rohm And Haas Company Electrophoretic deposition process
US4755273A (en) * 1986-01-02 1988-07-05 Bassett I Jay Cover for coating tanks
US4663014A (en) * 1986-01-02 1987-05-05 I. Jay Bassett Electrodeposition coating apparatus
AU2895702A (en) 2000-12-11 2002-06-24 Branimir Simic-Glavaski Molecular architecture for molecular electro-optical transistor and switch

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1769659A (en) * 1927-03-28 1930-07-01 Williams William Arthur Electrodeposition of rubber
GB482548A (en) * 1936-04-01 1938-03-31 British Thomson Houston Co Ltd Improvements in the electric deposition of resin films
NL57383C (en) * 1938-09-03
US2678909A (en) * 1949-11-05 1954-05-18 Westinghouse Electric Corp Process of electrodeposition of metals by periodic reverse current

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58109569A (en) * 1981-12-22 1983-06-29 Ratsukuberuke Buirufuingu Gmbh Thermosettable cathode electrodeposition composition and manufacture
JPS6351473B2 (en) * 1981-12-22 1988-10-14 Ratsukuberuke Uirufuinku Gmbh Unto Co
CN106637355A (en) * 2016-11-25 2017-05-10 北京工业大学 Electrophoretic deposition device and method for preparing film by using electorphoretic deposition method

Also Published As

Publication number Publication date
US3200057A (en) 1965-08-10

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