Letter 26034

Extending the life of steel galvanizing kettle [India] 

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Hi, we are Hot dip galvanizers of small articles in large no's and use conventional and traditional methods not exactly perfect though Just an idea.. we also have the problem of the steel pot slowly getting eaten away by the zinc due to dross formation. Is it possible to slow the reaction of dross formation by some electrostatic or electrolytic means? by applying a voltage across the zinc and the pot???

Dipesh Gupta
engineer - Chd, UT, India

How much life are you getting out of your current kettle and how much due you hope to get? Improving your burner system would probably be the best way to extend kettle life. I assume your kettle is made from steel with the proper steel chemistry (kettle steel). Impressing a current to the kettle may not be possible with the high temperatures.

Mike Stroia
Galvanizer - Canton, OH, USA

Regular dross removal and agitation is essential (every 2 weeks minimum). Kettle must be ultra low Si content. Low iron level in flux solution (<1%)helps.

Geoff Crowley
coatings - Scotland

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