With the advent of organic acids as varroa control has anyone observed increased failure/corrosion rates of hive fasteners, metal fixtures, screens and hardware?
Of course alot may have to do with the type of treatments. Oxalic is reported to be milder than formic. There is also the fact that woodenware should be glued well enough to not require the nail or staple. However screened bottoms and excluders are entirely exposed and vunerable. I could especially envision the detriment a corroded excluder could be on the bee's passing through.
Which then leads to a question on materials to be used in a corrosive environment. Feel free to discuss this if you like.