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<p>To enhance the corrosion resistance and bio-adhesion ability of AISI 304 stainless steel in the food processing environment, a Cu-Ce/TiO<sub>2</sub> composite coating was successfully fabricated on the surface of AISI 304 stainless steel by using the ultrasonic-assisted direct current electrodeposition method. The Cu-Ce/TiO<sub>2</sub> composite coating effectively enhanced surface performance. Among the components studied, the coating’s corrosion potential was the highest (−0.176&#xa0;V), whereas the corrosion current density was relatively low (9.28 × 10<sup>−8</sup> A/cm<sup>2</sup>). The enhanced corrosion resistance is attributed to its uniform element distribution and the formation of a dense passivation film rich in dense oxides. The Cu-Ce/TiO<sub>2</sub> composite coating exhibited the strongest antibacterial effect, with the antibacterial rates against <i>Staphylococcus aureus</i> and <i>Escherichia coli</i> reaching 99.6% and 99.5%, respectively. The enhanced performance is attributed to the synergistic effect between the contact-sterilization action of copper and cerium ions and the ion-release mechanism of TiO<sub>2</sub>, which promotes the generation of reactive oxygen species. Finally, the co-deposition mechanism of Cu-Ce alloy was studied through electrochemical tests. The results showed that the formation of the copper-cerium alloy is a transient nucleation process controlled by adsorption and desorption.</p>

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Study on the Mechanism of Cu-Ce Electrodeposition: Ultrasound-Assisted Electro-Deposition of Cu-Ce/TiO2 Composite Coating with Anti-microbial Adhesion Properties

  • 期刊论文

  • 发表日期：

    2026年2月17日

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  • Chuanduo Li,
  • Zhipeng Liang,
  • Yang Liu,
  • Junheng An,
  • Yan Liu,
  • Hui Jin,
  • Yiyong Wang

摘要

To enhance the corrosion resistance and bio-adhesion ability of AISI 304 stainless steel in the food processing environment, a Cu-Ce/TiO2 composite coating was successfully fabricated on the surface of AISI 304 stainless steel by using the ultrasonic-assisted direct current electrodeposition method. The Cu-Ce/TiO2 composite coating effectively enhanced surface performance. Among the components studied, the coating’s corrosion potential was the highest (−0.176 V), whereas the corrosion current density was relatively low (9.28 × 10−8 A/cm2). The enhanced corrosion resistance is attributed to its uniform element distribution and the formation of a dense passivation film rich in dense oxides. The Cu-Ce/TiO2 composite coating exhibited the strongest antibacterial effect, with the antibacterial rates against Staphylococcus aureus and Escherichia coli reaching 99.6% and 99.5%, respectively. The enhanced performance is attributed to the synergistic effect between the contact-sterilization action of copper and cerium ions and the ion-release mechanism of TiO2, which promotes the generation of reactive oxygen species. Finally, the co-deposition mechanism of Cu-Ce alloy was studied through electrochemical tests. The results showed that the formation of the copper-cerium alloy is a transient nucleation process controlled by adsorption and desorption.