Hoogovens Groep B.v.

Bala K Paramanathan

Johannes C Korver

Andries C De Muijnck

A marking powder is disclosed for marking metallic bodies, in particular hot metallic bodies, which may be steel or other ferrous metal. Zinc is present in the marking powder in an amount 20 to 70% by weight, and it found that this results in improved legibility, which lasts for longer. The powder may be prepared by adding zinc powder to a known aluminum-based marking powder in an appropriate ratio. Coarse zinc powder was found to be better.

Marking powder for and method of marking a metallic article

In electrolytic coating of one side of a moving metal strip, the strip as cathode is in contact with a rotating roller and an insoluble anode is concentric with the roller at a distance from the strip so that a slot is formed in which the electrolytic coating takes place. The electrolyte flows through the slot at a sufficient average velocity that turbulent flow occurs and is fed from a nozzle into the slot with a tangential component opposite to the direction of travel of the strip at the end of the slot at which the strip axis. The conformation of the nozzle is substantially uniform across the whole width of the strip and the electrolyte is fed into the slot at a velocity that nowhere varies more than 10% from the said average velocity of the electrolyte.

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Heemstede, Netherlands

Bala K Paramanathan