Coating processes – Immersion or partial immersion – Molten metal or fused salt bath
Patent
1991-04-12
1993-06-08
Beck, Shrive
Coating processes
Immersion or partial immersion
Molten metal or fused salt bath
4274342, 427436, B05D 118
Patent
active
052177599
ABSTRACT:
A process for continuous dip coating of a steel strip by passing it through a zinc bath containing aluminum and silicon wherein the aluminum content is approximately 55% by weight, the silicon content is 1% to 2% by weight, and the bath further includes strontium in a quantity in the range of 0.0001% to 0.2% by weight and at least one other element selected from among vanadium in a quantity in the range of 0.02% to 0.2% by weight and chromium in the range of 0.005% to 0.2% by weight. The addition of strontium and chromium and/or vanadium stabilizes the structure of the coating and reduces the formation of acicular precipitates of silicon. The coating has an improved adherence and ductility which permits it to be formed without cracking, while retaining an excellent resistance to corrosion. The resulting crystallization pattern of the coating is also finer and more regular and is independent of the substrate.
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patent: 3937858 (1976-02-01), Thiele
patent: 3952120 (1976-04-01), Horton et al.
patent: 4418984 (1983-12-01), Wysocki et al.
patent: 4456663 (1984-06-01), Leonard
patent: 4595600 (1986-06-01), Keeven et al.
Lamberigts Marcel
Leroy Vincent
Bareford Katherine A.
Beck Shrive
Centre de Recherches Metallurgiques--Centrum voor Research in de
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