Abstract: Corrosion behaviors of amorphous alloy Mg65Y10Cu25 and its corresponding crystalline multiphase alloy in 3.5%NaCl solution were studied by electrochemical methods and scanning electronic microscopy technology (SEM). Potentiodynamic experiments show that active dissolution takes place in Mg65Y10Cu25 amorphous alloy in NaCl solution, and the corrosion is controlled by both anodic and cathodic reactions. The corrosion resistance decreases with the elongation of immersion time. EIS experiments show that the time constants decrease from three to two when the amorphous alloy is immersed more than 6h. SEM experiment shows that very non-even corrosion takes place in the amorphous alloy when immersed for 24h in NaCl solution. The content of elements of the alloy surface changes greatly. The content of Mg decreases, while a new element of oxygen is found on the surface and its content varies greatly in different areas. The corrosion resistance of crystalline multiphase alloy is slightly increased. The corrosion mechanism of this alloy in 3.5%NaCl solution is also discussed.
Corrosion behavior of Mg65Y10Cu25 amorphous alloy in 3.5%NaCl solution
Abstract:
Corrosion behaviors of amorphous alloy Mg 65Y 10Cu 25 and its corresponding crystalline multiphase alloy in 3 5%NaCl solution were studied by electrochemical methods and scanning electronic microscopy technology (SEM) Potentiodynamic experiments show that active dissolution takes place in Mg 65Y 10Cu 25 amorphous alloy in NaCl solution, and the corrosion is controlled by both anodic and cathodic reactions The corrosion resistance decreases with the elongation of immersion time EIS experiments show that the time constants decrease from three to two when the amorphous alloy is immersed more than 6 h SEM experiment shows that very non-even corrosion takes place in the amorphous alloy when immersed for 24 h in NaCl solution The content of elements of the alloy surface changes greatly The content of Mg decreases, while a new element of oxygen is found on the surface and its content varies greatly in different areas The corrosion resistance of crystalline multiphase alloy is slightly increased The corrosion mechanism of this alloy in 3 5%NaCl solution is also discussed