Hydrothermal synthesis of ZnTa2O6, ZnNb2O6, MgTa2O6and MgNb2O6pseudo-binary oxide nanomaterials with anticorrosive properties

ZnTa 2 O 6 , ZnNb 2 O 6 , MgTa 2 O 6 and MgNb 2 O 6 pseudo-binary oxide nanomaterials were synthesized through the hydrothermal method at 250 °C. Obtained materials were characterized by X-ray diffraction, UV-VIS measurements, field emission-scanning electron microscopy and atomic force microscopy techniques. XRD results show that the single phases of ZnTa 2 O 6 , ZnNb 2 O 6 , MgTa 2 O 6 and MgNb 2 O 6 pseudo-binary oxides nanomaterials were obtained, no thermal treatment being required. The values for the optical band gap of each material are settled in the range 3.60–3.80 eV. The anticorrosion characteristics of the obtained compounds were also evaluated after deposition on carbon steel in 0.5 M Na 2 SO 4 media by open circuit potential measurements and potentiodynamic polarization technique with Tafel representation. The inhibition efficiency of pseudo-binary oxides deposited on carbon steel electrode was in the range 37–59.17%, promising for improvement of the anticorrosion properties.