certain "stick" welding rods by AWS code are hydroscopic- the flux absorbs ambient water in the air in humid conditions
From Argonne National Labs:
"hydroscopic": <=== Dictionary has no entry for hydroscopic
hy.gro.scop.ic Pronunciation: "hI-gr&-'sk-pik
Function: adjective Etymology: hygroscope,
an instrument showing changes in humidity + [^1]-ic;
from the use of such materials in the hygroscope Date: 1790
1 : readily taking up and retaining moisture
2 : taken up and retained under some conditions of
humidity and temperature
- hy.gro.scop.ic.i.ty /-(")sk@-'pi-s&-tE/ noun
Those rods are hygroscopic, as is any desicant.
