Study the Influence of the Anodizing Process Parameters on the Anodized Copper Hardness

Abstract

Abstract. The metals anodization process used to enhance the surface hardness and corrosion resistance. This study developed a durable hard Nano copper oxide coating on copper using anodization technique in solutions of 0.1 to 0.5 M oxalate concentrations and 0 to 24 ο C operating temperature. The settings of the process parameters determined by using Taguchi's experimental design method. The EDX and XRD results confirm the formation of cupric oxide coating with monoclinic lattice crystalline structures. The FESEM results for the coated samples showed that the grain size was in the range between 25 to 68 nm. Microhardness tests for the anodized copper samples characterized by microhardness tester. Analysis of Variance for the orthogonal arrays of Taguchi identified that the most affecting parameter on the microhardness of the coating was the anodizing temperature. The results show that the hardness of the anodized coating was decreased with the anodizing temperature, where maximum hardness, with smaller grain size, were produced at lower anodizing temperatures.

Effective Parameter of Nano-CuO Coating on CO Gas-Sensing Performance and Heat Transfer Efficiency

“…All experiments were performed using a three-electrode electrochemical cell consists of copper as the working electrode, silver/silver chloride (Ag/AgCl) (SSE) as the reference electrode, and platinum sheet as the counter electrode. The experiments were performed using the linear sweep voltammetry (LSV) method at the scan rate of 0.02 v/s, by means of Potentiostat/Galvanostat Auto-Lab, PGSTAT AUT86037, as reported in previous article [17]. The selected coating parameters include the temperature between 0 and 24 °C and oxalate concentration between 0.1 and 0.5 M. The effects of these parameters on the coating morphology were optimized to achieve the highest contact surface area to improve the gas-sensing and the thermal transfer performance.…”