Effects of C, N-codoped on the corrosion resistance of TiO₂ films prepared by plasma surface alloying and thermal oxidation duplex process

Abstract

C, N-codoped TiO₂ films have been deposited onto stainless steel substrates using plasma surface alloying and thermal oxidation duplex process. Composition analysis shows that the films shield the substrates entirely. The TiO₂ films are anatase in structure as characterized by X-ray diffraction. The electrochemical measurements show that the equilibrium corrosion potential positively shifts from −0.275 eV for bare stainless steel to −0.267 eV for C, N-codoped TiO₂ coated stainless steel, and the corrosion current density decreases from 1.3×10⁻⁵ A/cm² to 4.1×10⁻⁶ A/cm². The corrosion resistance obtained by electrochemistry noise also reveals that the C, N-codoped TiO₂ films provide good protection for stainless steel against corrosion in stimulated body fluid. The above results indicate that C, N-codoped TiO₂ films deposited by plasma surface alloying and thermal oxidation duplex process are effective in protecting stainless steel from corrosion.

Keywords

plasma surface alloying / titanium dioxide / C, N-codoped / corrosion / stainless steel / electrochemistry noise

References

[1] Finsgr M., Fassbender S., Hirth S., . Electrochemical and XPS Study of Polyethyleneimines of Different Molecular Sizes as Corrosion Inhibitors for AISI 430 Stainless Steel in Near-Neutral Chloride Media [J]. Mater. Chem. Phys., 2009, 116(1): 198-206.

[2] Liang C. H., Mou Z. Q. Study of Corrosion Behavior of 316L Stainless Steel and Co-Cr Alloy Biometallic Materials in Artificial Body Fluids [J]. Chin. J. Biomed. Eng., 2000, 19(4): 432-435.

[3] Ren Y. B., Yang C., Liang Y. Research and Development of New Biomedical Metallic Material [J]. Mater. Rev., 2002, 16(2): 12-15.

[4] Shen G. X., Chen Y. C., Lin L., . Study on a Hydrophobic Nano-TiO₂ Coating and Its Properties for Corrosion Protection of Metals [J]. Electrochimi. Acta, 2005, 50(25–26): 5 083-5 089.

[5] Atik M., Delimaneto P., Aegerter M. A., . Sol-Gel TiO₂-SiO₂ Films as Protective Coatings against Corrosion of 316L Stainless Steel in H₂SO₄ Solutions [J]. J. Appl. Electrochem., 1995, 25(2): 142-148.

[6] Miyauchi M., Nakajima A., Hashimoto K., . Highly Hydrophilic Thin Film under 1 mW/cm² UV Illumination [J]. Adv. Mater., 2000, 12(24): 1 923-1 927.

[7] Liu H. Y., Gao L. Synthesis and Properties of CdSe-Sensitized Rutile TiO₂ Nanocrystals as a Visible Light-Responsive Photocatalyst [J]. Am. Ceram. Soc., 2005, 88(4): 1 020-1 022.

[8] Kusoglu I. M., Celik E., Cetinel H., . Wear Behavior of Flame-Sprayed Al₂O₃-TiO₂ Coatings on Plain Carbon Steel Substrates [J]. Surf. Coat. Technol., 2005, 200(1–4): 1 173-1 177.

[9] Liu Q., Wu X., Wang B., . Preparation and Super-Hydrophilic Properties of TiO₂/SnO₂ Composite Thin Films [J]. Mater. Res. Bull., 2002, 37(14): 2 255-2 262.

[10] Cao Y., Yang W., Zhang W., . Improved Photocatalytic Activity of Sn⁴⁺ Doped TiO₂ Nanoparticulate Films Prepared by Plasma-Enhanced Chemical Vapor Deposition [J]. New J. Chem., 2004, 28(2): 218-222.

[11] X Tao, W Ma, J Li, et al. Efficient Degradation of Organic Pollutants Mediated by Immobilized Iron Tetrasulfophthalocyanine under Visible Light Irradiation [J]. Chem. Commun., 2003, (1): 80–81

[12] Hoffmann M. R., Martin S. T., Choi W., . Environmental Applications of Semiconductor Photocatalysis [J]. Chem. Rev., 1995, 95(1): 69-96.

[13] Linsebigler A. L., Lu G., Yates J. T. Photocatalysis on TiO₂ Surfaces: Principles, Mechanisms, and Selected Results [J]. Chem. Rev., 1995, 95(3): 735-758.

[14] Yao K. S., Wang D. Y., Ho W. Y., . Photocatalytic Bactericidal Effect of TiO₂ Thin Film on Plant Pathogens [J]. Surf. Coat. Technol., 2007, 201(15): 6 886-6 888.

[15] Huang J. M., Li Y. X., Cai X. P., . Photocatalytic Activities of Amorphous TiO₂-Cr Thin Films Prepared by Magnetron Sputtering [J]. J. Wuhan University of Technology-Mater. Sci. Ed., 2008, 23(5): 610-616.

[16] Ohko Y., Saitoh S., Tatsuma T., . Photoelectrochemical Anticorrosion and Self-Cleaning Effects of a TiO₂ Coating for Type 304 Stainless Steel [J]. Electrochem. Soc., 2001, 148(1): B24-B28.

[17] Siva Rama Krishna D., Sun Y. Thermally Oxidised Rutile-TiO₂ Coating on Stainless Steel for Tribological Properties and Corrosion Resistance Enhancement [J]. Appl. Surf. Sci., 2005, 252(4): 1 107-1 116.

[18] Shen G. X., Chen Y. C., Lin C. J. Corrosion Protection of 316 L Stainless Steel by a TiO₂ Nanoparticle Coating Prepared by Sol-Gel Method [J]. Thin Solid Films, 2005, 489(1–2): 130-136.

[19] Mahmoud M. G., Wang R. G., Kato M., . Influence of Ultraviolet Light Irradiation on Corrosion Behavior of Weathering Steel with and without TiO₂-Coating in 3 Mass% NaCl Solution [J]. Scr. Mater., 2005, 53(11): 1 303-1 308.

[20] Liu X. P., Gao Y., Li Z. H., . Cr-Ni-Mo-Co Surface Alloying Layer Formed by Plasma Surface Alloying in Pure Iron [J]. Appl. Surf. Sci., 2006, 252(10): 3 894-3 902.

[21] Hashimoto M., Miyajima S., Murata T. A Stochastic Analysis of Potential Fluctuation during Passive Film Breakdown and Repair on Iron [J]. Corros. Sci., 1992, 33(6): 885-904.

[22] Pistorius P. C., Burstein G. T. Growth of Corrosion Pits on Stainless Steel in Chloride Solution Containing Dilute Sulphate [J]. Corros. Sci., 1992, 33(12): 1 885-1 897.

[23] Metwally I. A., Al-Mandhari H. M., Gastli A., . Factors Affecting Cathodic-Protection Interference [J]. Eng. Anal. Bound. Elem., 2007, 31(6): 485-493.