Examining the Application of Coating Methodologies and Surface Analysis Post- machining Low Carbon Steel

Abstract

This study explored the corrosion behaviour of low carbon steel under various coating methods and engineered machining techniques. The study successfully created coatings with strong adhesion and minimal porosity using electroplating, painting, and blackening methods. To evaluate the corrosion resistance of these coatings, the research conducted tests using hydrochloric acid (HCL), sodium chloride solution (NaCl) and freshwater (H2O), as well as mechanical scratch tests to assess the coatings' interaction with the steel substrate. The experiment used low carbon steel specimens and analyzed their corrosion behaviour over a five-week period. The results showed that the all coatings exhibited superior corrosion resistance in freshwater (H2O), while blackening and electroplating performed better in hydrochloric acid (HCL) and sodium chloride solution (NaCl). Notably, paint coatings showed significant surface removal, while electroplating and blackening coatings displayed strong bonding and no visible removal. The study concluded that electroplating and blackening are more suitable for low carbon steel applications requiring mechanical strength due to their ability to withstand scratches without compromising surface integrity. The findings highlight the varying effectiveness of different coating methods in protecting low carbon steel from corrosion in different environments.