Inhibition and mechanism of hydrogen evolution reaction in electroplating process
Electroplating is a commonly used surface treatment technology in the industry.However,the plating processes are often accompanied by hydrogen evolution reactions(HER),resulting in the entry of some hydrogen atoms into the substrate,leading to bubbling,substrate cracking.This problem in industry is solved by employing a 4-24 h annealing post treatment of plated parts at 200℃to eliminate the potential for hydrogen embrittlement.However,the long time of dehydrogenation not only reduces the production efficiency,but also consumes fossil energy.The effect of rare earth salts on the hydrogen permeation behavior during electroplating was investigated using the Devanathan-Stachur-ski double electrolytic cell technique.At the same time,the influence of rare earth salt as an additive on cathode hydrogen evolution during electroplating was explored.The effect of rare earth salts on the kinetic parameters of HER in electroplating was calculated using the Iyer-Pickering-Zamanzadeh(IPZ)model.The results indicate that rare earth salts can inhibit hydrogen permeation during electroplating.Consequently,it reduces the post treatment time and the use of fossil fuels,thus providing a new idea for energy saving and emission reduction.
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