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#92902 04/18/05 07:38 PM
Joined: Jan 2005
Posts: 5,370
Likes: 1
Cat Servant
Member're right, of in the "High Desert" we don't have near the rust problems those of you in the salt belt do. :-)

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#92903 04/19/05 05:25 AM
Joined: Jul 2002
Posts: 680
Maybe in Reno screws don't rust out but they sure do here in NE.

How long would it take for a drywall screw to rust to the point of breaking in NE.? I can't imagine it would be a concern in my lifetime. I generally use #10 galv. screws but I can't see getting too excited about using drywall screws. My guess is the guy just wan't to find something to whine about.

#92904 04/24/05 04:33 PM
Joined: Apr 2005
Posts: 20
I was looking through the forum and noticed this topic. I haven’t heard about the “no sheetrock screws” in a long time. Years ago an older electrician (a genius of an electrician at that) that I worked with on occasion told me not to use sheetrock screws because of the metal they were made with. The dissimilar metals between the screws and metal enclosures or boxes would make the area around the hole in the box and the screw rust prematurely and break. How long this would take I don’t know. I just know we couldn’t use sheetrock screws on his projects. Every now and then –such as this post- I hear of this issue and this was the only explanation I was given.


#92905 04/27/05 12:50 AM
Joined: Feb 2005
Posts: 693
It's called "galvanic reaction", and it causes molecules of one metal to migrate to the other, similar to how batteries work. Ever heard of a "sacrificial anode" in a water heater?

Larry Fine
Fine Electric Co.
#92906 05/01/05 03:43 PM
Joined: Dec 2002
Posts: 308

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