Improved photocathodic protection performance of C-vacancy g-C3N4/GO/WO3 for 304 stainless steel

Fabrication of Z-Scheme TiO2/Au/CdS Nanostructured Coating with Enhanced Photocathodic Protection Performance for Carbon Steel

“…Tauc curves are displayed in Figure b. The band gap of the prepared samples can be calculated according to the Kubelka–Munk equation (eq ): α h v = A false( h v − E normalg false) η where α is the optical absorption coefficient, h is the Planck constant, v is the light frequency, A is a constant, E g is the band gap, and η is the electron transition mode (the direct and indirect band gaps are 1/2 and 2, respectively). In this work, the prepared anatase TiO 2 shows indirect transition semiconductor property, and the η value is taken as 2 …”

“…The photogenerated electrons of the coating could migrate to the metal substrate, resulting in its cathodic polarization so-called photocathodic protection. , It is energy saving and could supply long-term corrosion protection . Recently, researchers have revealed that TiO 2 , − Cu 2 O, and g-C 3 N 4 , are suitable for photocathodic protection. TiO 2 is mostly studied but it has a relatively large band gap (3.2 eV), which presents low solar photoconversion efficiency …”

Zn3In2S6/TiO2 Nanocomposites for Highly Efficient Photocathodic Protection to Carbon Steel

“…The Tauc curves are shown in Figure b. The Kubelka–Munk equation is as follows , α h ν = A false( h ν − E normalg false) η α, h , and ν are the optical absorption coefficient, Planck constant, and photon frequency, respectively. A represents a constant, E g represents the semiconductor band gap, and η is the electronic transition mode (the direct band gap is 1/2; the indirect band gap is 2).…”

“…It suggests that the smaller the R ct value, the better the PCP performance. 44 When the carbon steel is coupled to TiO 2 , the R ct is 50.16 Ω•cm 2 . As for the carbon steel coupled to TiO 2 /ZIS6-30, the corresponding result is 15.44 Ω•cm 2 .…”

“…The obtained R ct can reflect the cathodic reaction property of the photoanode. It suggests that the smaller the R ct value, the better the PCP performance . When the carbon steel is coupled to TiO 2 , the R ct is 50.16 Ω·cm 2 .…”