Influence of an aggressive environment on the corrosion resistance of multicomponent Fe amorphous alloys
in Ukrainian

M. A. Kovbuz, O. M. Hertsyk, T. G. Pereverzieva, S. Ye. Shurko, N. L. Pandiak, K. V. Protsyshyn
2018 Himia Fizika ta Tehnologia Poverhni  
Electrochemical methods (potentiometry and voltammetry) used to evaluate the corrosion resistance of the amorphous metallic alloys (AMA) based on iron: Fe media of distilled H 2 O, 0.5 М solutions of HCl, NaOH, NaCl and saturated solution of (NH 4 ) 2 SO 4 at 291, 298, 303 K. Under such conditions amorphous samples are characterized by high corrosion resistance in comparison with crystalline steel and during the exposure for 24 days samples of amorphous alloys are passivated. Due to the slower
more » ... Due to the slower cooling rate for the bulk samples (10 2 -10 3 K/min) compared the tape (10 4 -10 6 K/min) the dense oxide layers are formed on the surface of the bulk amorphous alloys, providing them the highest corrosion resistance. The microhardness of amorphous alloys exceeded the microhardness of steels in 4-5 times, especially after the previous low-temperature modification. After cooling at low temperatures the surface layers of the AMA are sealed. Considering the high corrosion resistance we recommend amorphous alloys for laser coatings (lamination) of agricultural machines, which contact with different aggressive media. They also can be applied to the forest industry, the peat cutting, the grinding of garbage, and also to the military industry.
doi:10.15407/hftp09.01.064 fatcat:krsym5kxwzdmjmuw4t43ah62hi