The inhibition of hydrogen formation during cementation of cobalt onto zinc

在电积锌之前，使用锌粉胶结去除硫酸锌溶液中的微量杂质是标准的工业技术。该过程包括在活化剂存在的情况下，将细分化的锌粉搅拌到不纯的锌溶液中，以去除溶液中十亿分之一的关键杂质。该技术实现了锌电积的高电流效率。锌粉的使用效率很低，因为锌粉必须通过冶炼厂生产的一些阴极锌产品的熔化和水雾化来获得。锌粉低效的关键模式是与水和酸反应生成氢气。本研究的目的是研究在锌粉胶结过程中使用氢抑制来控制氢的形成。无机和有机抑制剂将被研究。研究的三个步骤包括文献检索，抑制剂对产氢速率的电化学研究，最后是抑制剂的胶结研究。该项目将培养一名硕士生和两名本科生助理。

The use of zinc dust cementation for removal of trace impurities from zinc sulphate solution prior to zinc electrowinning is the standard industrial technology. The process involves stirring finely divided zinc dust into the impure zinc solution, in the presence of activators, in order to remove key impurities to the part per billion level in solution. This technology enables high current efficiency in zinc electrowinning. The use of zinc dust is inefficient as zinc dust must be obtained by melting and water atomizing some of the cathode zinc product produced at the refinery. The key mode of zinc dust inefficiency is the formation of hydrogen gas via reaction with water and acid. The objective of this research is to investigate the use of hydrogen inhibition to control the formation of hydrogen during zinc dust cementation. Both inorganic and organic inibitors will be investigated. The three steps in the study include a literature search, an electrochemical investigation of the role of inhibitors on the hydrogen generation rate and finally a study of cementation with inhibitors. The project will allow for training of one Masters student and two undergraduate student assistants.