Process for controlling snout zinc vapor in a hot dip zinc based

Details Process for controlling snout zinc vapor in a hot dip zinc based Process for controlling snout zinc vapor in a hot dip zinc based

1984-07-30

1985-12-10

Silverberg, Sam

Coating processes

Immersion or partial immersion

Molten metal or fused salt bath

427321, C23C 102

Patent

active

045579539

ABSTRACT:
A process for suppressing zinc vapor in the snout of a continuous line for hot dip coating one side or both sides of a ferrous base metal strip with a molten zinc or zinc based alloy by maintaining the atmosphere within the snout to include about 1-8% hydrogen by volume and about 300 ppm to 4500 ppm water vapor with the balance being one or more inert gases, such as nitrogen. The atmosphere has a hydrogen/water vapor ratio of at least 4 to 1, or higher. This atmosphere is oxidizing to zinc vapor but non-oxidizing to the ferrous strip.

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patent: 4444814 (1984-03-01), Flinchum
patent: 4466999 (1984-08-01), Leonard
patent: 4478892 (1984-10-01), Amberson

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