Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ
The authoritative public forum
for Metal Finishing since 1989
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Theoretical consumption of zinc and acid in zinc galvanizing process
December 19, 2010
Sir, I want to know what is the theoretical consumption as per books and chemical reaction between zinc and iron and iron oxide with HCl . It can help us to achieve the figure near to it in the production. your reply will give us immense help to us and reader.
My finding is that total consumption of chemicals in production are as follow
Zn--- 46 kg / T
Pb--- 0.60 kg / T
HCL--- 26 kg / T
NH4Cl-- 1.3 kg/ T
ZnCl2-- 1.01 kg / T
Will you please suggest ideal figure of the consumption of above chemicals so that we can make as effort to achieve the same.
Thanks & regards
- Jodhpur, India
December 27, 2010
A. Thanks, Dinesh. Regrettably I'm not a galvanizer, only the forum curator, so I'm not much help with good galvanizing practice; I hope a galvanizer will respond. Meanwhile letters 41571 and 51916 are a start; and if you search the site for "ash" and "dross", threads on those subjects will provide a bit of input for you. Good luck.
Regards,
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
A. Consumption is so dependent on material type, and quantity that without stating those variables, comparison is meaningless.
A galvanizing plant that processes only heavy structural steel might think your figures poor performance, which another doing lightweight, thin materials would think them good.
Most comparisons are made per tonne, but perhaps should be made per m2. (area). Acid is consumed cleaning area, not weight, and zinc is consumed coating area not weight. But industry wide we state these consumptions per tonne. Seems silly, but perhaps thats because tonnes are so much easier to measure that surface area in fabricated steelwork of complex size and shapes.
In other coating industries area is the base unit for such statistics.
Geoff Crowley
Crithwood Ltd.
Westfield, Scotland, UK
December 28, 2010
Thanks Ted Mooney & Geoff Crowley for your kind reply. I got totally agree with Mr. Crowley that both this parameter depend upon surface area of the material galvanized. Will you please tell me the ideal figure of consumption of acid and zinc as per surface area from this we can calculate the consumption weight per tonne. The material to be galvanized are the power and electric pole.
- Jodhpur, India
December 29, 2010
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