B - Operations – Transporting – 05 – D
Patent
B - Operations, Transporting
05
D
117/160
B05D 5/12 (2006.01) B05D 7/14 (2006.01) H01F 1/18 (2006.01)
Patent
CA 1286553
ABSTRACT OF THE DISCLOSURE A process is disclosed for applying to sheet steel an elec- trically insulating layer whose main purpose is to permit a satisfactory welding of the sheets when they have been blanked and stacked. The sheet steel is contacted with a treating liquor which contains a resin adapted to be diluted in an alkaline aqueous medium, and a fluoride of a polyvalent metal, particularly aluminum fluoride, in an amount of 0.1 to 80 parts by weight per 100 parts by weight of resin. The treating liquor is subsequently dried and the sheet is subjected to a stress-relieving annealing, if required. In accordance with a preferred embodiment, the treating liquor additionally contains borates and/or dispersed particles made of silicate and/or polymers, and is applied by means of rollers before being dried at 120 to 350°C.
513891
Domes Heribert
Quack Gunther
Domes Heribert
Metallgesellschaft Aktiengesellschaft
Quack Gunther
Robic
Stahlwerke Bochum Ag
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