Electrochemical behavior of magnesium alloys as biodegradable materials in Hank's solution

Monitoring magnesium degradation using microdialysis and fabric-based biosensors

“…The weight loss over immersion time can be related to the general corrosion, a phenomenon previously reported by Wang et al [37]. The higher increment of weight loss and pH on the period of day 1 to day 2 compared to the period of day 2 to day 5 could be related to the formation of adherent corrosion products (e.g., magnesium hydroxide and phosphates) on the specimen's surface that slows down corrosion process temporarily [38]. However, other factors besides the chemical reaction that contribute to the weight loss of magnesium during degradation were not considered in this study, such as the deposition of degradation products (MgCO 3 , CaCO 3 , NaCl) which increases the final weight, and the dissociation of broken piece of magnesium which reduces the final weight [39].…”

Corrosion inhibition by naturally occurring Hibiscus sabdariffa plant extract on a mild steel alloy in HCl solution

“…These results enable the determination of various electrochemical corrosion parameters of the two electrodes using Thales software for i/E analysis. 12 To avoid the presence of some degree of nonlinearity in the Tafel region of the obtained polarization curves, the Tafel constants were calculated as the slope of the points after E corr by 50 mV, using computer least squares analysis. The corrosion current was then determined by the intersection of the cathodic or the anodic Tafel line with the potential of zero current in the potentiodynamic curves or E corr .…”

“…All curves show one time constant. Using a constant phase element (CPE), 12 the simple Randle's equivalent circuit was found to be satisfactory for fitting the impedance data. The model ( Figure 1b) consisted of a solution resistance (R s ) in series with RC parallel combination (R/Q), which represents the charge transfer resistance and a constant phase element (Q) instead of an ideal capacitance element for the double layer, respectively, representing the corrosion product layer on the sample surface.…”

“…The model ( Figure 1b) consisted of a solution resistance (R s ) in series with RC parallel combination (R/Q), which represents the charge transfer resistance and a constant phase element (Q) instead of an ideal capacitance element for the double layer, respectively, representing the corrosion product layer on the sample surface. 12 In this model the total cell impedance Z(ω) is represented by the following complex function:…”

Hexagonal Boron Nitride Impregnated Silane Composite Coating for Corrosion Resistance of Magnesium Alloys for Temporary Bioimplant Applications

“…Besides their suitable mechanical properties, these alloys also show good cytocompatibility, and their hydrogen generation rate is at acceptable levels for this purpose [10,11]. However, despite these attractive properties, there has been extremely limited success in the use of Mg alloys for human implants, primarily due to their unacceptably high corrosion rate in human body fluid [7,12]. It is intriguing that magnesium alloys are attractive as temporary implants primarily because they can harmlessly corrode away after they have served their purpose, thereby avoiding the need of a second surgery.…”