The goldish coating is also zinc, but derives its distinctive color from a yellow chromate, which lends thr coating additional corrosion resistance for outdoor use. Commonly seen for deck screws. IMO, yellow matches better when treated wood is new, but green looks better if the treated woods will fade with age and not be stained or painted.
Zinc should never be used with treated wood. You use zinc for regular wood only.
Even though the way of pressure-treating lumber has adapted, specific fasteners will still experience accelerated corrosion. Specifically, zinc and hot-dipped galvanized screws will corrode over time when used in pressure-treated lumber. However, the thickness of the zinc coating will determine how quickly corrosion will occur.
For the longest time I thought pressure-treated wood meant it was treated with pressure. Only just crossed my mind that it means they use pressure to get the treatment chemicals further in the wood.
The goldish coating is also zinc, but derives its distinctive color from a yellow chromate, which lends thr coating additional corrosion resistance for outdoor use. Commonly seen for deck screws. IMO, yellow matches better when treated wood is new, but green looks better if the treated woods will fade with age and not be stained or painted.
Zinc should never be used with treated wood. You use zinc for regular wood only.
For the longest time I thought pressure-treated wood meant it was treated with pressure. Only just crossed my mind that it means they use pressure to get the treatment chemicals further in the wood.
Some of them they even have “injectors” to get it deeper for stuff that’s permanently under ground.
I think it’s called PWF (Permanent Wood Foundation) wood in most places. Even most “treated” wood isn’t meant for direct ground contact.