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[Display omitted] • ZnO resistive switching film is prepared by one-step hydrothermal method. • Application of electric field can promote the formation of oxygen-vacancy in film. • High-low resistive switching behavior of film varies with oxygen vacancy content. ZnO resistive switching films were prepared on the surface of SS304 using hydrothermal method combined with heat treatment. The surface and cross-sectional morphology, composition, oxygen vacancy content and semiconductor type of ZnO films were characterized. The corrosion resistance and resistance switching properties of ZnO films were determined by electrochemical methods. The oxygen vacancy formation energy, surface adsorption energy and diffusion barrier of ZnO system were calculated using first-principles. The results show that the samples with 0.5 mol/L Zn2+ and 4 mol/L NaOH have the best performance, and its corrosion resistance efficiency can reach more than 99.5 %. Calculations show that the ZnO film containing oxygen vacancies still prevents the entry of Cl−, and applied electric field promotes the formation of oxygen vacancies and conductive filaments. Thus, polarization-immersion treatment can adjust the oxygen vacancy content in film, which enables film to switch between high and low resistance states, realizing the cyclic resistance-switching performance of film and greatly extending service life. [ABSTRACT FROM AUTHOR]

[Display omitted] • Al x Zn 1- x O resistive switching film was successfully prepared on SS304 steel by sol–gel method. • Compared with substrate, Al x Zn 1- x O films have excellent corrosion resistance with lower corrosion current density and higher impedance value. • The film has excellent resistance switching performance. Regulating the concentration of oxygen vacancies in the film by the immersion-polarization process, the prepared film could be varied between the high resistance state and low resistance state, allowing the film to be recycled and thus extending its service life. Al x Zn 1- x O films were prepared on SS304 by using sol–gel method combined with spinning and heat treatment. The surface morphology, composition and structure of films were observed and characterized by scanning electron microscopy, X-ray diffractometer and Fourier transform infrared spectroscopy. The oxygen vacancy content and semiconductor type of Al x Zn 1- x O films were determined by X-ray photoelectron spectroscopy, electronic para -magnetic resonance spectroscopy, Mott-Schottky curve and density function theoretical calculation. The corrosion resistance and resistive switching performance of Al x Zn 1- x O films were measured by using electrochemical methods and immersion-polarisation experiments. The results show that the prepared Al x Zn 1- x O films are in n -type semiconductor material with a homogeneous and dense surface, the oxygen vacancy content is decreased with the increasing of Al dopping content. The corrosive resistance of Al x Zn 1- x O film was increased with the increasing of Al doping content with the best corrosion resistance at the doping content of 4% Al. During the immersion process, the corrosion resistance of Al x Zn 1- x O film was firstly increased and then decreased. The corrosion resistance of Al x Zn 1- x O films could be switched in the high and low resistance states under the immersion-polarization process by adjusting of the oxygen vacancy content in film. [ABSTRACT FROM AUTHOR]

[Display omitted] • Zn 1- x Cr x O resistive switching films were successfully prepared on the surface of SS304 by using the sol–gel method. • Compared with substrate, Zn 1- x Cr x O films have lower corrosion current density, higher impedance value, and excellent corrosion resistance. • The film has excellent resistance switching performance, and the oxygen vacancy concentration of the film can be adjusted by the immersion-polarization process to enable the prepared film to switch between high resistance and low resistance states, which greatly extends the service life of the film. Zn 1- x Cr x O resistive switching film with different Cr content was prepared on SS304 substrate by sol–gel method combined with spin plating and heat treatment. The surface morphology, composition, structure, semiconductor type and oxygen vacancy concentration of Zn 1- x Cr x O films were observed and analyzed by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Mott-Schottky curves, X-ray photoelectron spectroscopy (XPS) electron paramagnetic resonance spectroscopy (ESR) and density functional theory (DFT) calculation. And the corrosion resistance of Zn 1- x Cr x O film were investigated by polarization curves and electrochemical impedance spectroscopy (EIS). The results show that the prepared Zn 1- x Cr x O films have a uniform dense surface which belongs to n -type semiconductor type, and the oxygen vacancy concentration in the films increases with the increase of Cr content. With the increasing of Cr content, the corrosion resistance of films is decreased. During the immersion process, the corrosion resistance of Zn 1- x Cr x O film is firstly increased and then decreased with increasing immersion time. By applying immersion and polarization treatment the corrosion resistance of Zn 1- x Cr x O film could be regulated between the high and low resistance states (HRS and LRS) due to the creation and disappearance of oxygen vacancies in the film. [ABSTRACT FROM AUTHOR]

[Display omitted] • A NIR-induced self-healing MIL-53@TA/PCL coating was designed and prepared by using MIL-53@TA as photothermal agent and PCL as low-melting-point layer. • The MIL-53@TA/PCL composite coating possesses excellent photothermal property. • The MIL-53@TA/PCL composite coating greatly improves corrosion resistance of Mg alloy. • The scratched MIL-53@TA/PCL coating can be healed within 10 min irradiated by 808 nm NIR (0.17 W/cm2) A novel self-healing composite coating was fabricated on magnesium alloy by using polycaprolactone (PCL) as resin matrix and iron-based metal-organic framework MIL-53 modified with tannic acid (TA) as function filler. The surface morphology, structure and wettability of composite coating were characterized by scanning electron microscopy (SEM), Fourier transform infrared (FT-IR) and sessile water droplet static contact angle. The corrosion resistance and healing performance of PCL coatings was determined by electrochemical impedance spectroscopy (EIS) and photothermal tests. Results indicate that MIL-53@TA/PCL coating possesses a flatter surface, a higher corrosion resistance and better photothermal effect than that of blank PCL coating and MIL-53/PCL coating. Under the near-infrared (NIR) laser irradiation with the wave length of 808 nm, the scratched MIL-53@TA/PCL coating could be healed within 10 min because of the excellent photothermal conversion ability of MIL-53@TA component. [ABSTRACT FROM AUTHOR]