Abstract
Polarization characteristics were investigated for electroless copper plating baths consisting of copper sulfate, EDTA, formaldehyde, glycine, potassium hexacyanoferrate (II) and triethanolamine. The effects of bath composition and convection on the electrode processes-oxidation of formaldehyde, deposition of copper and anodic dissolution of copper-were evaluated using a rotating copper disk as the working electrode. It was inferred that the rate of oxidation of formaldehyde was proportional to the amount of formaldehyde adsorbed in accord with the Langmuir isotherm. It was further suggested that hexacyanoferrate (II) was adsorbed in accord with the Langmuir isotherm for dissociation adsorption (n=2), retarding the above electrode processes. The effect of electrode rotation was significant only at high current densities where the diffusion of copper complex from/to the electrode was rate-determinating, while no substantial effect was found on local processes near the rest potential.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.