Spa chemicals destroy decking screws

[Markus]

I've had my spa for almost 3 years now. It was placed on a new pressure treated deck. I used the green-coated decking screws. One week ago I decided to remove the spa from the deck platform and replace the deck with a solid cement platform 8' X 8' X 15" high. As I was unscrewing the deck to make it easier to dismantle...I noticed all the deck screws around the spa (which were exposed to the chlorine), were all deteriorating/corroding. Some of the screws snapped at the center of the threads and with others the head snapped off. The threads were very corroded. The screws that were under the spa (protected from the elements) were perfectly fine.
I definitely believe that it's a combination of the elements.

Anyone else notice this?

[gwstudios]

I have noticed that pure copper will actually start to foam the hot tub water that touches it right before your eyes and begin to release minute amounts smoke / steam from the chemical process.

I don't think a penny will work as it's a zinc / copper mix but you could try it anyways.

My deck screws are the wood colored ones but don't seem to be affected at all by the spa water. It may be the coating that causes them to start corroding.

[Zep]

"I noticed all the deck screws around the spa (which were exposed to the chlorine),
were all deteriorating/corroding"

OMG....whats it doing to our bodies!  

[Hillbilly Hot Tub]

Causing cancer like the dyhydra-monoxide is

[Renee]

My cousin works for a lumberyard, and was talking this summer how green treated wood has changed.  It no longer has arsenic in it.  However, he warned that you MUST use stainless steel screws or triple coated screws.  He is seeing newer decks falling apart because the wrong kind of screws were used.  He said it doesn't take very long at all for the incorrect screws to deteriorate in green treated wood.   I highly doubt it's from the chlorine.  If it were, there would be many people on this board having similar problems...