Structure and Electrochemical Corrosion Resistance of the Passivated Fe-40at.%Al Binary Alloy in Sulfuric Acid Solution

Abstract

The electrochemical corrosion resistance of the passivated Fe-40at.%Al binary alloy has been investigated in sulfuric acid at 25°C. Structural investigations were conducted by XRD method and confirmed a single phase material of the ordered B2 structure. Electrochemical corrosion behavior was determined using potentiodynamic polarization and EIS methods. Anodic polarization measurements revealed a passive behavior of the tested electrode. Detailed characteristics of the Fe-40at.%Al electrode | passive film | solution interface as a function of the electrode potential in the fully passive range of 0.5  E  1.5 V, was investigated. The impedance behavior was determined by a highly doped n-i-n structure (n-type semiconductor – insulator – n-type semiconductor).

Virtual material testing for stamping simulations based on polycrystal plasticity

“…A number of studies on the aqueous corrosion behavior of binary Fe-Al alloys have been reported so far, but they mainly focused on binary Fe-Al alloys with a limited variation of the Al content [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26] or Fe-Al alloys with additional alloying elements [11,[27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45]. Moreover, these investigations were carried out in a variety of electrolytes.…”

“…However, no post mortem examinations were performed. Table 1 summarizes the compositions of the binary Fe-Al alloys and electrolytes investigated in previous investigations [10][11][12][13][14]16,[11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26]34,46,47]. In summary, it has been recently concluded that a systematic study of the aqueous corrosion behavior of binary Fe-Al alloys is still necessary [13].…”