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Metal finishing Q&As since 1989
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Substitute for Zinc phosphate pretreatment?
We're looking for a substitute for our present zinc phosphate process. We primarily phosphate to enhance the shelf life of steel parts made in-house. This process uses 180 degree F coating bath and hot rinse before and after.
Our goal is reduce cost while improving the waste treatment costs. Thanks. jb
John Brown- Damascus, Virginia
1999
John, phosphate is pretty basic as far as plating options go. You can try a room temp. black oxide with an oil or wax seal. You can also look at conventional or mechanical galvanizing if the parts lend themselves to that type of coating.
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Jim Conner
Anoplex Software
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Mabank, Texas USA
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1999
There is a product manufactured by International Chemical Products, Inc., located at Huntsville, AL, which will replace zinc phosphate (also chromate) and provide a very long term corrosion protection indoors with just the coating, while the surface is totally prepared for any finishing.
Ranjit Sen- Huntsville, Alabama
2000
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