plaster skim corrode copper?

[stevetheplumber]

quick tip buy a spray can of carb cleaner spray from a motor factors cleans denso of a treat

 

[macackau]

quick tip buy a spray can of carb cleaner spray from a motor factors cleans denso of a treat

Thanks for that tip!

 

[lame plumber]

one coat plaster has lime in some makes evil stuff for copper.

 

[Mgrant]

I am surprised that replies have been that finish plaster corrodes copper.
Any copper pipes I have ever seen covered in finish plaster have been perfectly good order.
The danger is any dampness and particularly sand and cement or the solid walls (brick, stone or concrete block).
If it is a dry wall, like an internal wall, then it is still advisable to put something as a barrier over the copper pipes, such as electrical insulating tape. Sleeve other pipes.
Copper pipes have been plastered with finish where they come out of walls and ceilings for years and good as new.
One place I do not like bare copper pipe is coming out of tiled floors, whether on solid or wood floors. I prefer the tile to be drilled larger than the pipe diameter and pipe collars fitted so no grout used. Another option is to use insulating tape on part of pipe coming out of floor.

So abit of dried plaster skim is unlikely to corrode a copper pipe. Or were pipes exit ceilings and are plastered up to.

 

[Best]

So abit of dried plaster skim is unlikely to corrode a copper pipe. Or were pipes exit ceilings and are plastered up to.

As far as I see, the finish itself is fairly harmless. That said, you don't really want any damp plaster or any chemicals on copper pipe. Even the rain makes a right stain on new copper.