B - Operations – Transporting – 05 – D
Patent
B - Operations, Transporting
05
D
327/109, 327/114
B05D 7/24 (2006.01) B23K 11/10 (2006.01) B23K 11/30 (2006.01) B23K 11/34 (2006.01) B23K 35/22 (2006.01)
Patent
CA 1329071
IMPROVED RESISTANCE WELDING OF GALVANIZED STEEL ABSTRACT A coating for improved resistance of galvanized steel parts or sheets comprises a binder, and a metal phosphide pigment, preferably a ferro- phosphorus pigment, having a particle size of from about 0.1 to about 30 microns. The pigment can also include up to about 40% by weight of an additional metal such as tin, aluminum or lead, which can be combined with the metal phosphide in pigment form or deposited onto the surface of the particles. The coating can be applied to either the faying or non-faying surfaces of the galvanized steel, or to the resistance welding electrode, and may be removed, if desired, after the welding operation. The advant- ages of the present invention include a significant reduction in welding current and an increase in the weldability lobe width, a restoration of the dynamic resistance beta peak, and an increase in electrode life.
566716
Campbell Donald H.
Evarts Gerald L.
Occidental Chemical Corporation
Swabey Ogilvy Renault
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