Influence of chloride ion concentration on the corrosion behavior of Al-bearing TRIP steels

Influence of cerium(III) ions on corrosion of TRIP 800 steel in hydrochloric acid solution

“…Low‐alloyed C‐Mn‐Si TRIP steels present complex multiphase microstructures, consisting of a ferritic matrix and a dispersion of multiphase grains of martensite, bainite, and higher C‐retained austenite . The different microstructure, chemical composition or stress state of each phase can lead to galvanic coupling phenomena, thus enhancing the corrosion of TRIP steels in acidic media .…”

“…Low-alloyed C-Mn-Si TRIP steels present complex multiphase microstructures, consisting of a ferritic matrix and a dispersion of multiphase grains of martensite, bainite, and higher C-retained austenite [1,2]. The different microstructure, chemical composition or stress state of each phase can lead to galvanic coupling phenomena, thus enhancing the corrosion of TRIP steels in acidic media [28]. Figure 1 presents the potentiodynamic polarization curves for the corrosion of TRIP 800 steel after an open circuit potential stabilization period of 120 min in 0.5 M HCl solutions containing various Ce(III) ion concentrations.…”

Effects of Ultrasonic Surface Rolling on the Localized Corrosion Behavior of 7B50-T7751 Aluminum Alloy

“…The radius of the large semicircle increased significantly with increasing immersion time. Two crests for the positive value and a trough for the negative value in each phase angle curve (Bode plot) indicated the interaction of three time constants [37]. The number of time constants corresponded to the number of electronic components.…”

Corrosion Behavior of Aluminized Steel Sheets in 50-Year Outdoor Exposure Test

“…Several reports have been published regarding the electrochemical properties of Al-bearing steel in a dilute solution. For example, F. E. Heakal et al 16) measured the polarization of Al-free steel and 1.3% Al steel in a 0.05M NaCl solution and found that the corrosion potentials were approximately − 0.62 and − 0.68 V (SCE), respectively. X. H. Chen et al 17) measured the polarization of steels with an Al content of 0 to 1.85% in a 0.3% NaCl solution and reported that the corrosion potentials of the Al-free steel and the 0.96% Al steel were approximately − 0.49 and − 0.58 V (SCE), respectively.…”