The hydrogen evolution reaction is known as a parasitic reaction during the zinc electrodeposition from alkaline zincate solutions and is thus responsible for current efficiency losses during the electrolysis. Besides that, the rising hydrogen bubbles may cause an extra convection within a diffusion layer, which leads to an enhanced mass transport of zincate ions to an electrode surface. In this work, the mentioned phenomena were studied experimentally in a flow through electrolyzer and the obtained data were subsequently evaluated by mathematical models. The results prove the indisputable influence of the rising hydrogen bubbles on the additional mixing of the diffusion layer, which partially compensates the drop of the current efficiency of the zinc deposition at higher current flows. Moreover, the results show that the current density ratio (i.e., the ratio of an overall current density to a zinc limiting current density) is not suitable for the description of the zinc deposition, because the hydrogen evolution current density is always involved in the overall current density.

氢逸出反应被称为从碱性锌酸盐溶液进行锌电沉积期间的寄生反应，因此是造成电解过程中电流效率损失的原因。除此之外，上升的氢气泡可能在扩散层内引起额外的对流，这导致锌酸盐离子向电极表面的质量传输增强。在这项工作中，上述现象在流过电解槽的过程中进行了实验研究，随后通过数学模型对获得的数据进行了评估。结果证明了上升的氢气泡对扩散层的附加混合具有无可争议的影响，这部分地补偿了在较高电流下锌沉积的电流效率的下降。而且，结果表明电流密度比（i。