Cobalt electrodeposition onto stainless steel 304 from ammoniacal solutions

• NANCY RAMOS-LORA ^[1] ; L.H MENDOZA-HUIZAR ^[1] ; C.H RIOS REYES ^[1]
  1. [1] Universidad Autónoma del Estado de Hidalgo

     Universidad Autónoma del Estado de Hidalgo

     México

     
• Localización: Journal of the Chilean Chemical Society (Boletín de la Sociedad Chilena de Química), ISSN-e 0717-6309, ISSN 0366-1644, Vol. 56, Nº. 2, 2011, págs. 631-634
• Idioma: inglés
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• Resumen

  • In this work we studied the cobalt electrodeposition onto a stainless steel 304 electrode from an aqueous solution containing 10¹ M of CoSO4 + 1M (NH4)2SO4 at natural pH of 4.5. Black cobalt deposits were obtained under our experimental conditions. The average diffusion coefficient calculated was 9.8X10(6) cm²s-1 while the AG for the formation of stable nucleus was 1.013X10(20) J/nuclei. The critical cluster's size calculated was 0 which suggested that each active site is a critical nucleus on the SSE-304 surface. The Scanning Electron Microscopy images showed the formation of non-uniform cobalt particles.