The finishing.com Hotline -- Serious Education ... plus the most fun you can have in metal finishing
What do I need to start a small galvanizing plantDecember 20, 2010
I would like to start a small plant to do galvanizing up to a 2 m workpieceStephanus Petrus Janse van Rensburg
small businessman - South Africa
First of two simultaneous responses -- December 23, 2010
Approach with caution. In the USA, more than one new and good galvanizer was put out of business because an established shop can lower its price enough to make it impossible for a new shop to compete. His equipment is paid for.James Watts
- Navarre, Florida
Second of two simultaneous responses -- December 27, 2010
A "small" galvanizing plant has many problems. The laws of physics must be taken into consideration. A small pot of molten zinc has a low heat capacity and thus production will be correspondingly low. You need to consider what you want for an hourly throughput and determine what the temperature drop will be for each "lift" (load) and how many "lifts" you need per hour. If the temperature drop is more than a few degrees C then zinc drainage from the workpieces will suffer. Additionally you need enough length in the kettle to have an "ash box" which allows partial recovery of dry ash. Further the kettle needs to be 1.5 to 2 times deeper than wide to provide enough heat input to make-up for radiated heat losses at the zinc/air interface and for production. Dross removal in a small kettle is another problem. A "clam" does not do a good job of drossing, whereas a "scoop" works well but cannot fit into a short kettle. With reasonable good production, dross accumulation in a short (small) kettle will require frequent drossing because it has rapid vertical accumulation. About the smallest viable kettle I have worked with was about 12 ft x 4 ft (wide) x 6 ft deep and used for spin work. A kettle smaller than this is difficult to make money from.
Galvanizing Consultant - Hot Springs, South Dakota
December 29, 2010
The question is not specific enough. Its like asking "What car is best for me?" without specifying the operating conditions.
What market? Tonnage? sizes? prices? captive or jobbing? experience or not?
powder coating shop