TY JOUR TI USING BIODEGRADABLE MATERIALS TO PROTECT AGRICULTURAL MACHINERY FROM CORROSION KW storage KW corrosion KW rendered fats KW protective coating KW corrosion JO Vestnik of Kazan State Agrarian University AU Smirnov, A.G. AU Maksimov, I.I. AU Kalimullin, M.N. PY 2025 IS 20 PB Kazan state agrarian University