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ElectroGalvanize or Hot-Dip Galvanize?

Could you please compare / contrast ElectroGalvanizing with Hot-Dip Galvanizing, with respect to both process and coating longevity / quality?

Thanks,

HARVEY R. BROCK
- HOUSTON, Texas
2003

The basic difference is controlability. With electrogalvanised, it's easier to get an even coating. I'm not saying easy, I'm saying easier. If anyone out there can give a fuller comparison please do.

Ian Brooke
university - Glasgow, Scotland
2003

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Hi,

That depends on whether the construction should be used inside or outside!

If the construction should be used inside, electrogalvanizing will be enough. If the construction should be used outside it'll last much longer by hotdip galvanizing it.

The construction material thickness will be a factor too. If the construction material is very thin, it'll be difficult or not possible at all, to hotdip galvanize it.

At last the price might be a factor too. In most countries electrogalvanizing is the expensive one.

Good luck :)

Poul Søndergaard
- Denmark
2003

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First of two simultaneous responses --

Thanks, Poul. Your first 3 points are informative and, to the best of my limited knowledge, correct. But I don't think your final point is correct. Thanks.

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey

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Second of two simultaneous responses --

Electrogalvanize has limits to the coating thickness. Multiple passes are required to get thicker coatings. Hot dip is much more effective in obtaining the thicker coatings.

Ronald Zeeman
- Brampton, ON, Canada
2003
2003

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Hi Ted.

Sorry, I can't be right all the time you know :)

Poul Søndergaard
- Denmark
2003

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Mr. Brock,

There is at least another point to consider. Hot dip galvanize will have theoretically infinite throwing power, which means the ability to penetrate in recessed areas such as interior of long pipes, inside deep threads, corners, holes, etc. Whereas electrogalvanize is subject to electrical laws and will not cover these areas or the coverage will be limited.

Guillermo Marrufo
Monterrey, NL, Mexico
2003