Duplex nanoporous Cu was successfully fabricated by dealloying a dual-phase Mg–Cu precursor alloy consisting of intermetallic Mg2Cu and MgCu2. The duplex nanoporous Cu with embedded nanoporous struts exhibited highly enhanced strength compared to the typical monolithic nanoporous Cu under both compressiv...
7. The polarization curves were used to estimate the corrosion potential (Ecorr), pitting potential (Epp), and corrosion current density (Icorr) by the Tafel extrapolation of the cathodic branches26. The average corrosion rate (ACR, mm y21) is calculated based on following equation: ACR~ Icorr...
Meanwhile, the galvanic cell formed between the nanoporous layer and amorphous matrix also helps for increasing the transfer rate of electrons in the wastewater, accelerating its degradation rate [33,42]. The degradation reaction of the pesticide wastewater can be listed as follows [42,43]: 2M+2...
Figure 4 shows the polarization curves of the Mg-Al-Pb and Mg-Al-Pb-La alloys in a 3.5% NaCl solution. It is important to note that R-correction has been performed in the polarization curves according to the equation Vtrue=V-IRs (where I is the measured potentiostatic current, Rs is ...
Then, the mass loss data were converted to a corrosion rate using the following equation:CR =KW/ADT [28,29]where the constant K is 8.76 × 104, W is the mass loss (g), A is the surface area exposed to solution (cm2), D is the density of the material (g/cm3) and T is the...
3. Results and discussion Fig. 1a and b show SEM micrographs of the Mg–Cu precursor alloys. It can be seen that the Mg–33.3Cu and Mg–36.7Cu alloys have single-phase and dual-phase microstructures, respectively. The EBSD phase analysis results given in Fig. 1c and d indicated that th...
In all cases, the microgalvanic mechanism is observed, with the AZ31 being the anodic region and Ti6Al4V serving as the cathode. The corrosion products formed on the surfaces loosely adhered to the bulk materials (Figure 9). When corrosion products were removed, the differences in the ...
At the level of HBDC cells grown on the surface of the alloy, increased levels of α5b1 and b1 integrin receptors were discovered, which play a role in mediating cell adhesion to the surface of biomaterials. Thus, it is assumed that the increased viability expressed by Mg–1Ca alloys in ...
it was found that deformation did not compromise the biocompatibility of the alloy and did not have any significant effect on cell adhesion and proliferation. However, an extract of the alloy promoted the alkaline phosphatase activity of human mesenchymal stromal cells, which indicates osteogenic stimul...
general corrosion and bio-corrosion behavior respectively. The samples before and after immersion were weighed. After immersion, they were cleaned with chromic acid (ASTM G1-90) to remove corrosion products. The equation used to determine the corrosion rate (CR) for immersion test measurements is:...