Corrosion rates for dry galvanized pipe? Please Help!
Corrosion rates for dry galvanized pipe? Please Help!
(OP)
Hello,
I am wondering if someone can help, does anyone know where or how I can figure out approximately how much longer Black sch.40 galvanized pipe would last compared to regular Black sch.40 pipe not galvanized. This pipe will almost always be dry?
I have found some information on mm of steel lost per year per 100 liner ft but only for sch 40 water filled pipe but un able to find corrosion rates for dry or galvanized
for dry or galvanized.
I am wondering if someone can help, does anyone know where or how I can figure out approximately how much longer Black sch.40 galvanized pipe would last compared to regular Black sch.40 pipe not galvanized. This pipe will almost always be dry?
I have found some information on mm of steel lost per year per 100 liner ft but only for sch 40 water filled pipe but un able to find corrosion rates for dry or galvanized
for dry or galvanized.





RE: Corrosion rates for dry galvanized pipe? Please Help!
There is no corrosion in terms of metal loss in dry environment, hence the zinc coating does not make any difference. It does make some difference however, in wet or moist environment, in presence of unlimited oxygen. The bare carbon steel may react with the available oxygen to produce the "rust", but the zinc will act as a barrier to the oxygen. The topic is very complex and I encourage you to take some time read about it on the internet and also on this forum, by using the search facility on top of this page.
cheers,
gr2vessels
RE: Corrosion rates for dry galvanized pipe? Please Help!
What do you mean by "almost always be dry"?
If this is a dry sprinkler pipe - almost always dry might be worse than always wet.
Galvanized pipe works wonders - as long as the the protection doesn't flake - as it might with bad coating or with bad installation.
RE: Corrosion rates for dry galvanized pipe? Please Help!
Thanks Paul
RE: Corrosion rates for dry galvanized pipe? Please Help!
Service Life Chart for Hot-Dip Galvanized Coatings
http://www
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hope this help u
S
http://www.mindmeister.com/maps/show/6213919
Corrosion Protection & Corrosion Control