Impacts of waste glass and cement powders on the morphological properties and corrosion resistances of PM austenitic stainless steel

In this study, the effects of waste glass and cement powders on the structural, physical and corrosion resistance of X2CrNiMo17-12-2 austenitic stainless steel (ASS) prepared by the powder metallurgy method were examined. ASS powder was homogeneously mixed with glass powder (GP) and Portland limestone cement (PLC) at different ratios of 5–15–25 wt%. For all composite samples, the ASS–5GP composite sample has maximum bulk (5.57 ± 0.053 g/cm3) and apparent solid densities (5.63±0.054 g/cm3), minimum apparent porosity (1.04 ± 0.010%), water absorption (0.19 ± 0.002%) and packing density (0.99±0.00) and also the lowest current density (69.40 μA), highest polarisation resistance (1887±109.0 Ω), lower corrosion rate (161.4 mpy), larger Nyquist diameter due to the decreasing of corrosion potential (−0.693 mV), near phase angle to 90° (46°) and the largest log ∣Z|, lower Yu value (5.67±0.05×10−3). Protection efficiency and inhibitory efficiency values of this sample are calculated as 78.15% (ηEIS), 59.65% (ηICORR, IE%) and 59.75% (ηCR, IE%), and also, βa/βc of this sample is 3.12. The best corrosion resistance was obtained on the ASS–5GP composite sample. With this study, potential applications of GP and PLC materials in structural and civil industries for evaluating waste and structural materials to prevent environmental pollution and meet structural requirements will be suggested.