Вплив складу агресивного середовища на корозійну тривкість багатокомпонентних аморфних сплавів на основі Fe

• Datum: 2018
• Hauptverfasser: Kovbuz, M. A., Hertsyk, O. M., Pereverzieva, T. G., Shurko, S. Ye., Pandiak, N. L., Protsyshyn, K. V.
• Format: Artikel
• Sprache: Ukrainian
• Veröffentlicht: Chuiko Institute of Surface Chemistry National Academy of Sciences of Ukraine 2018
• Schlagworte: аморфні сплави на основі Fe; хімічний опір; корозійна тривкість
• Online Zugang: https://www.cpts.com.ua/index.php/cpts/article/view/455
• Назва журналу: Chemistry, Physics and Technology of Surface

Electrochemical methods (potentiometry and voltammetry) used to evaluate the corrosion resistance of the amorphous metallic alloys (AMA) based on iron: Fe78.5Ni1.0Mo0.5Si6.0B14.0, Fe65.58Мо4.69Cr7.92P6.93Si2.85B5.94, Fe55Ni20.28Cr7.04Mo1.61V1.07B6.56Al2.67Si1.07 in aggressive environments of distilled H2O, 0.5 М solutions of HCl, NaOH, NaCl and saturated solution of (NH4)2SO4 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 cooling rate for the bulk samples (102–103 K/min) compared the tape (104–106 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 apply to the forest industry, the peat cutting, the grinding of garbage, and also to the military industry.