Abstract
SUMMARYThe texture and morphology of zinc electrodeposits prepared under direct current (DC) and pulse current (PC) plating conditions from an acidic sulphate bath on low-carbon steel cathodes were investigated by means of the relative texture coefficients (obtained by X-ray diffraction analysis) and scanning electron microscopy. As verified, the variation of DC deposition current density from very low (0·5 A dm 2) to moderately high values (40 A dm 2), is associated with changes in texture, grain structure and surface morphology of the deposited films, depending on the adopted acidic bath pH (2·0–4·5). PC plating effectively modifies the properties obtained, within a limited range of conditions; however at high current densities PC resembles DC plating. A brief discussion on the nucleation and growth mechanisms involved, is attempted.
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