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Use of copper sulfate to protect metal



October 27, 2008

We inspect and repair oilfield tools i.e. threaded steel connections. I heard that after performing grinding to repair threads and shoulders of the oilfield connections (pin and box), we should apply copper sulfate to the ground area. Can you explain the benefits and is it really worth it. The use a pipe dope to grease the connection prior to mating.

Sean Lavergne
Industrial Services - Willis, Texas



November 14, 2008

I rather doubt that you are using copper sulfate on oil well parts. It will promote rusting. You might be using a fine metallic copper based anti seize material or possibly copper plating.

James Watts
- Navarre, Florida



November 27, 2008

Welding wire is frequently coated with a very fine layer of copper deposited by immersion in copper sulfate acid solutions to delay oxidation from air. It is not intended for top resistance, long durability or tough environments.

Guillermo Marrufo
Monterrey, NL, Mexico


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