Specimens of seven different types of steel plate] were subjected to animal waste environments to determine resistance to corrosion during a 49-month trial. The metal types included: unpainted cold-rolled steel (BS), cold-rolled steel covered with epoxy paint (ECS), batch galvanized (BG), Galfan 60 (GF-60), Galfan 90 (GF-90), stainless steel (SS) and drawing quality galvanized (DQ). Specimens were exposed to dairy, swine and poultry manure in the following situations: manure collection pit, animal housing area, suspended over an anaerobic lagoon and submerged in an anaerobic lagoon. The manure collection pit environments caused the greatest amount of corrosion. Only the SS and BG specimens did not suffer metal loss for either the swine, dairy or poultry manure pits. All other metal types suffered appreciable metal loss in manure pit environments with the exception of GF-90 in the swine and dairy manure pits. Very little metal loss was observed on any of the specimens in the animal housing areas or those submerged in the anaerobic lagoons. Of the specimens positioned above the anaerobic lagoons only BS and ECS suffered metal loss.