Anyone seesing corrosion where cattle panels or wire mesh touch treated lumber?

[SteveE]

Does your set up have any HC or feed lot panels in contact with treated lumber? How is it holding up? Any corrosion? The treated lumber fine print all says to be sure to use stainless steel or hot dip galvanized fasteners, and sure, the HC comes galvanized but time and elements will beat on that coating. If you had to do it over, would you change the lumber or add a barrier strip of something to keep them separate?

 

[DobieLover]

Does your set up have any HC or feed lot panels in contact with treated lumber? How is it holding up? Any corrosion? The treated lumber fine print all says to be sure to use stainless steel or hot dip galvanized fasteners, and sure, the HC comes galvanized but time and elements will beat on that coating. If you had to do it over, would you change the lumber or add a barrier strip of something to keep them separate?

I have not seen any signs of corrosion and I have hot dip galvanized hardware cloth stapled to treated lumber with poultry staples. Generally speaking corrosion occurs when two dissimilar metals are left in contact in acidic conditions.

 

[SteveE]

Generally speaking corrosion occurs when two dissimilar metals are left in contact in acidic conditions.

Thanks for replying! How long have your gavlanized HC and staples been in service? Is it exposed to elements or under roof/tarp mostly?

Since the usual recipe for treated lumber includes copper that's one metal, and why the fine print says use stainless steel or galvanized hardware. I hadn't heard that acid is a factor before, that's interesting.

 

[DobieLover]

Thanks for replying! How long have your gavlanized HC and staples been in service? Is it exposed to elements or under roof/tarp mostly?

Since the usual recipe for treated lumber includes copper that's one metal, and why the fine print says use stainless steel or galvanized hardware. I hadn't heard that acid is a factor before, that's interesting.

Nearly 3 years exposed.
The lumber is treated with a copper salt. It's not metal unless it's reduced by gaining 2 electrons.

 

[krlind01]

That fine print goes back to a change in treating methods for lumber. Old treated lumber used an arsenic material which was discontinued a number of years ago.

Now they use alkaline copper quaternary and there was an assumption that the copper properties would react with traditional screws. It is remote at best. I haven't seen HC or any other metal fencing deteriorate any faster than it would otherwise just because it is in contact with treated lumber.

The warning label has more to do with long term effects, especially in structural applications.