Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ

finishing.com -- The Home Page of the Finishing Industry

The authoritative public forum
for Metal Finishing since 1989
-----

Corrosion Black iron vs Copper

I am looking for a cheap and effective coating that will prevent corrosion between black iron and brass in a NPT threaded assembly. The surfaces to be coated are the female threads.

Guy Duval
- Montreal, Quebec, Canada
2001

The best and simplest thing to do is to install a dielectric union. In the USA I bought my last ones at Home Depot. About $5.00 US If it is not critical, you can connect it with PVC fittings.You will want a union in it so it can be unscrewed if you needed to do maintenance on any part of the system. James Watts
- Navarre, Florida
2001

(No "dead threads" here! If this page isn't currently on the Hotline your Q, A, or Comment will restore it)

Q, A, or Comment on THIS thread -or- Start a NEW Thread

Disclaimer: It's not possible to fully diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations might be harmful.

If you are seeking a product or service related to metal finishing, please check these Directories: