acid pickle

acid pickle

[′as·əd ′pik·əl]
(materials)
Industrial waste water that is the spent liquor from a chemical process used to clean metal surfaces.
References in periodicals archive ?
Henkel Corporation has introduced Bonderite[R] Deoxidine[R] 216[TM], an industrial strength, phosphate-free acid pickle designed to clean inorganic soils such as rust, laser scale, weld scale, and unwanted oxides off of metal surface in preparation for conversion coating.