Effects of number of substituents and molecular weight of polyamines on the non-cyanide alkaline zinc plating process

Truong Thi Nam, Le Ba Thang, Le Duc Bao, Nguyen Van Khuong


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.


polyquaternium-7; polyamine (Bt); additive; alkaline non-cyanide zinc plating; zinc coating

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DOI: https://doi.org/10.15625/2525-2518/59/1/15452 Display counter: Abstract : 48 views. PDF : 16 views.


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