Assessment of corrosion resistance and reliability of Cu/diamond composite materials in aquatic environment

The corrosion resistance of Cu/Diamond composite materials, a combination of copper and diamond, was investigated in aqueous conditions. A 3.5 % NaCl neutral salt spray was employed to assess the corrosion performance of the composite, considering factors such as surface appearance, corrosion rate, and corrosion depth. The results revealed that corrosion predominantly occurred within the copper matrix, while the diamond and interface components remained resistant to corrosion. Micro-galvanic corrosion was identified as the primary corrosion mechanism. Additionally, the incorporation of 5 % diamond particles led to a notable improvement in corrosion resistance, reaching 93.7 %. Although the salt spray environment did induce some changes in the composite surface, it did not significantly impact the overall properties of the composite.