Effects of number of substituents and molecular weight of polyamines on the non-cyanide alkaline zinc plating process
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DOI:
https://doi.org/10.15625/2525-2518/59/1/15452Keywords:
polyquaternium-7, polyamine (Bt), additive, alkaline non-cyanide zinc plating, zinc coatingAbstract
The effects of the number of substituents and molecular weight of polyamines in the non-cyanide alkaline plating bath on the morphology, brightness and bright ranges of zinc electrodeposited coating and cathodic polarization, cyclic voltammogram on the non-cyanide alkaline zinc plating process were investigated. Cathodic polarization measurements showed that the polyamines all increased cathodic polarization of the plating process and shifted the zinc reduced potential to a more negative direction. However, cycle voltammogram curves of the 5 continuous cycles shows that the quaternary polyamine Q7-20 has a more stable adsorption and desorption processes than the secondary polyamine Bt18 has.Downloads
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