The effect of electrochemical adsorbates on texture and morphology development during zinc and zinc–cobalt electrodepositions

Electrochemical impedance spectroscopy (EIS) investigation of zinc electrodeposition at 10 mA cm−2 indicated the possibility of hydrogen adsorption during deposition process. This causes low angle pyramidal {1 1.5} and {1 0.3} texture component via lateral bunching and results the morphology of ridges type. Conversely, at the same current density used in zinc–cobalt deposition the hydrogen adsorption is less pronounced due to adsorption of cobalt and/or cobalt-contained species during the growth stage. This leads to a strong inhibition resulted in a different type of growth, called “Field-Oriented Texture”. This kind of growth promoted columnar grain growth results in a large number of elongated crystals almost normal to the substrate surface followed by some blocky crystals on top of them. This develops prism planes as a major texture component besides some basal and low angle pyramidal planes.