Abstract
Effects of copper surface roughness [Formula: see text] on the properties of Ni–Co–Fe alloy coatings were studied by the measurement of coating roughness, thickness, hardness, substrate/coating bonding force and the potentiodynamic polarization curve. Results showed that at the current density of 4[Formula: see text]A/dm2, the coating roughness increased with the increase of the value of substrate [Formula: see text] in the range 0.1–1.1[Formula: see text][Formula: see text]m. The coating thickness and hardness increased with the decrease of substrate [Formula: see text]. When substrate [Formula: see text] was 0.4[Formula: see text][Formula: see text]m, the substrate/coating bonding force reached the maximum level. When substrate [Formula: see text] was 0.1[Formula: see text][Formula: see text]m, the coating exhibited the best corrosion resistance. The comprehensive properties of the Ni–Co–Fe coatings can be effectively improved by controlling the surface roughness of copper substrate properly.
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