Study on the Corrosion Resistance of TiCcoating Bytungsten Argon Arc Surfacing Welding

Abstract

Corrosion is not just among the most important reasons for material loss and energy consumption, it also one of the main causes for the failure of mechanical parts [1-2].Using excellent surface strengthening technology and, performing anti-corrosion coating on metallic material surfaces can not only improve the reliability and service life of products, it can also reduce product repair and replacement. In addition, surface-strengthening technology can also save material and energy, which contributes to the protection of the environment and aligns with a sustainable development strategy. This paper utilizes tungsten argon arc surface welding technology to study the corrosion resistance of titanium carbide(TiC) coating. Graphite powder, titanium(TiC) powder, and iron(Fe) powder as pre-applied powders were put on 45 steel surfaces to prepare TiC/Fe matrix composite coating using in-situ synthesis technology. The microstructure and properties of the coating were investigated by measuring the open circuit potential, polarization curve in 3.5% sodium chloride (NaCl) solution, 5% sulfuric acid (H2O4)solution. The conclusions were verified using weight loss method. The results of the experiment show that in 3.5% sodium chloride solution, the stable corrosion potential of TiC coating is higher than 45 steel. Other effects include a decrease in the thermodynamic trend of corrosion reaction and a reduction in the possibility of corrosion. However it did not change obviously in 5% sulfuric acid solution. Thus the corrosion rate of TiC coating is higher than 45 steel in 3.5% sodium chloride solution and 5% sulfuric acid solution. KeywordsTungsten ArgonArc Surfacing Welding; Composite Coating; TiC; Corrosion Resistance