Letter 41042

Hot dipped galvanized vs electrogalvanized [Texas] 

June 7, 2006

Clevis hangers that are to be used to support piping are available in hot dipped galvanized finish or Electro- Galvanized. My question is which coating is the better?

Graeme Mc Dougall
Construction - Austin, Texas, USA

Hello, Graeme. Very similar questions have been asked and answered many times on this site. So if you need a 2nd opinion, patient application of the search engine will yield it, but for a quick answer --

Electrogalvanized means zinc electroplated. Both electroplating and hot dipping can be used to apply a coating of zinc to steel. Zinc electroplating has a definite advantage in appearance and for close fitting parts, but hot dipping will give much better corrosion resistance because the zinc coating will be about ten times thicker.

 
Ted Mooney, P.E.
finishing.com Inc. - Brick, NJ

I want to answer or follow-up on this subject publicly (in non-commercial fashion).

 

My company is a supporting advertiser at finishing.com and we want the contact information to reach the inquirer privately.

 

I want to post a new question or inquiry of my own on a different subject.