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Machine translation
1. (WO1979000608) ELECTROTREATING A METAL SURFACE
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1979/000608    International Application No.:    PCT/GB1979/000027
Publication Date: 23.08.1979 International Filing Date: 09.02.1979
IPC:
C25D 3/56 (2006.01), C25D 5/06 (2006.01)
Applicants:
Inventors:
Priority Data:
20954/78 20.05.1978 GB
Title (EN) ELECTROTREATING A METAL SURFACE
(FR) ELECTRO-TRAITEMENT D"UNE SURFACE METALLIQUE
Abstract: front page image
(EN)A brush electrode for use in electrotreating a metal surface, comprises an electrode (2) covered by an absorbent abrasive material (4) formed of synthetic fibres. A preferred abrasive material is a mixed polypropylene/nylon felt in which the fibres are consolidated by needle-punching and bonded with acrylic resin. The invention includes a method of depositing a metal or an alloy on to a metal body using the brush electrode, which allows good quality deposits to be obtained without the need to transport the metal body to a factory for the treatment. A solution for use in the method, which is especially stable under such conditions, includes metal ions which will form an alloy, a hydroxycarboxylic acid such as a gluconate or heptonate to complex metal ions, and a carboxylic acid such as acetic acid also to complex metal ions. Best results are obtained when the pH of the solution is between 0.5 and 2.
(FR)Un balai electrode utilise dans l"electro-traitement d"une surface metallique, comprend une electrode (2) recouverte d"un materiau abrasif absorbant (4) forme de fibres synthetiques. Un materiau abrasif prefere est un feutre de polypropylene/nylon dans lequel les fibres sont consolidees par piquage et liees avec une resine acrylique. L"invention comprend une methode de depot d"un metal ou d"un alliage sur un corps metallique par utilisation d"un balai electrode qui permet d"obtenir des depots de bonne qualite sans avoir besoin de transporter la piece metallique dans une usine pour la traiter. Une solution utilisee avec cette methode, specialement stable dans de telles conditions, comprend des ions metalliques qui formeront un alliage, un acide hydroxy-carboxylique tel qu"un gluconate ou un heptonate pour complexer les ions metalliques, et un acide carboxylique tel que l"acide acetique, egalement pour complexer les ions metalliques. Les meilleurs resultats s"obtiennent lorsque le pH de la solution est entre 0,5 et 2.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)