Hydrogen embrittlement of SK 85 high - strength steel sheets was evaluated using a three - point bending test. Using acid dipping before elec -troplating, mainly zinc and zinc - nickel alloy electroplating, we examined effects on hydrogen embrittlement in terms of hydrogen permeability of the plating films. Both zinc and zinc - nickel alloy electroplating caused hydrogen embrittlement, which was promoted by hydrogen, based on hydrogen ion reduction during electroplating. Hydrogen embrittlement of zinc - electroplated SK 85 steel continued with time and film thinning, but that of the zinc - nickel alloy electroplating was reduced. These results indicate that the zinc film had insufficient permeability for hydrogen embrittlement. However, that of zinc - nickel alloy electroplating enabled hydrogen diffusion from the substrate. Results demonstrate that zinc nickel alloy electroplating having hydrogen permeability and excellent corrosion resistance is an effective plating method to prevent hydrogen embrittlement of high - strength steel.
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Hino et al. (2019) studied this question.
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