Abstract

VILLON-ULLOA, Ángel  and  CRUZ-CONTRERAS, Jesús. Electrolytic Codeposition of zinc and nickel, in order to improve Standard Industrial Galvanizing. Tecnia [online]. 2021, vol.31, n.2, pp.33-38.  Epub June 01, 2021. ISSN 0375-7765.  http://dx.doi.org/10.21754/tecnia.v21i2.1033.

An improved galvanizing with the Zn and Ni co-deposition, achieved an improvement in the hardness at 140-148 HV and a corrosion rate of 4.8-6.4 mpy with a deposit of 9.8% Ni and 90.2% of Zn, with a salt bath of Ni and Zn sulphate at pH 1-3, using as additives thiourea, sodium gluconate and boric acid among others, with differentiated current densities for each anode, nickel with 6 A/dm2 and for zinc 5 A/dm2, the times used were enough to cause an adequate thickness for tests of 10-15 minutes, with an electrolytic cell with agitation, with cathodic efficiency of 48 to 65%.

Keywords : Electrocodeposition zinc / nickel; improved galvanization; corrosion rate.

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