Corrosion? happening on galvanized steel
Corrosion? happening on galvanized steel
(OP)
Hello.
Do you think corrosion is happening on these galvanized steel plates with a low level corrosion resistant coating (G90)?
They were sprayed by a solution(Sodium hypochlorite, Sodium carbonate, Sodium hydroxide) one year ago.
(The surface was shiny before the spray.)
Thanks.



Do you think corrosion is happening on these galvanized steel plates with a low level corrosion resistant coating (G90)?
They were sprayed by a solution(Sodium hypochlorite, Sodium carbonate, Sodium hydroxide) one year ago.
(The surface was shiny before the spray.)
Thanks.



RE: Corrosion? happening on galvanized steel
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P.E. Metallurgy, consulting work welcomed
RE: Corrosion? happening on galvanized steel
RE: Corrosion? happening on galvanized steel
regards
RE: Corrosion? happening on galvanized steel
RE: Corrosion? happening on galvanized steel
That chemical has been left on the surface on the steel plates since then. Now, most of the connector plates in the attic are like these pictures.
The attic could be humid in some circumstances and it could get a water leak during a storm. Some condensation on the roofing nails in winter has already been observed.
Will the steel part of these plates get corroded fast in this environment since Zinc is already sacrificed?
If so, how soon may it happen from your experience?
Thanks
RE: Corrosion? happening on galvanized steel
Apply a coat of epoxy zinc paint to enhance the steel life.
DHURJATI SEN
Kolkata, India
RE: Corrosion? happening on galvanized steel
Almost all truss connector plates of this one-year old house look like these pictures.
Is a repair required immediately to extend the longevity of the structure?
How to repair? With WD40?
Thanks.
RE: Corrosion? happening on galvanized steel
Or someplace very hot and humid?
If not then don't worry about it.
Even if the plates rust it will just look ugly. They will still work fine.
Near the sea, then I might think about giving them a brushing with a wire brush.
Just by hand to knock off any loose material.
Then painting with a Zn rich paint.
You could use a small roller.
I wouldn't worry about it though.
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P.E. Metallurgy, consulting work welcomed
RE: Corrosion? happening on galvanized steel
No need to brush with either coating.