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Material of construction for galvanizing baskets

Hi All,

My name is Karu I am running a galvanizing plant where we galvanize fasteners.
My problem is we are using M.S Baskets for the dipping in kettle.
with that we are loosing lot of zinc and we are higher on Dross percent.
Please give me your valuable suggestions to improve our consumption.

Regards,

Gandla Karunakar
Galvanizing plant incharge - Visakapatnam, Andhra Pradesh , India
March 21, 2009

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March 23, 2009

Sir:
Haynes International 556 alloy.

Dr. Thomas H. Cook
Galvanizing Consultant - Hot Springs, South Dakota, USA

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March 25, 2009

Dear Sir,

Haynes 556 alloy is a iron-nickel-chromium-cobalt alloy.I think iron in this alloy will react with the zinc which further makes a coating. Please correct me if I am wrong.

Regards,

Karu

Karunakar Gandla
- Vizag, Andhra Pradesh, INDIA

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First of two simultaneous responses --

You will get reasonable service from using a very low Si steel. Look for Si = trace.

Geoff Crowley
Crithwood Ltd.
Westfield, Scotland, UK

March 25, 2009

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Second of two simultaneous responses --

Then please accept this as a correction :)

The fact that the alloy contains iron is not relevant. It is a single-phase material, and therefore the properties of the individual constituents do not apply - the properties of the whole alloy may be (and in this case certainly are) quite different from the properties of any of its constituents.

Haynes 556 is well-proven as the best available material for your application.

Bill Reynolds [deceased]
consultant metallurgist - Ballarat, Victoria, Australia
We sadly relate the news that Bill passed away on Jan. 29, 2010.
March 25, 2009

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Sir:

One galvanizer used the SAME Haynes 556 alloy spin baskets for more than 20 years. When this company went out of business (for other reasons) they sold the Haynes baskets at a good price.

Another galvanizer has been using the same 556 alloy spin baskets for about 25 years. Keep in mind that Haynes 556 alloy is twice as strong as ordinary steel and retains 95% of its strength at the molten zinc temperature. Thus the baskets need only be 1/2 as thick as ordinary steel. You cannot cut this alloy with a torch and it is difficult to drill. It can be welded but I do not know the details.

Oridinary steel baskets need to be very low in silicon, phosphorus, and aluminum. The weld material must match the steel. Ordinary steel retains only 67% of its strength at the galvanizing temperature and is not very strong to start with.

Regards,

Dr. Thomas H. Cook
Galvanizing Consultant - Hot Springs, South Dakota, USA
March 27, 2009

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April 10, 2009

Dear All,

Are there ways of keeping the baskets clean longer and thus requiring less stripping in flux or acid?

Regards.

Iresha Ranasinghe
- Sapugaskanda, Colombo, Sri Lanka

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Dear Sir.

For Galvanizing kettle in India.. you will get steel from Steel Authority of India ltd.. Steel Grade known as "DSQ" Means dead soft quality ( low carbon and low silicon )

regards

Vyas

Ilesh G Vyas
Gunatit Builders

Manjalpur, Vadodara, Gujarat


June 11, 2009