|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Characterization of Minerals, Metals, and Materials
||LL-75: Investigation of the Passivation Mechanism of Copper-based Anodes from In-situ Observations
||Yuma Ninomiya, Hideaki Sasaki, Masafumi Maeda
|On-Site Speaker (Planned)
In the recycling process of copper, scraps are smelted in specialized furnaces. crude copper obtained with this procedure has a high level of impurities. an electro-refining process cannot be applied to such low-grade copper because these impurities cause passivation. instead, other refining processes such as solvent extraction and electro-winning (sx-ew), which incur higher energy costs than electro-refining, are employed. a fundamental understanding of passivation and its prevention is required to develop a new electro-refining process for low-grade copper anodes. anodic behaviors of copper-based electrodes are investigated with a channel flow double electrode technique and in-situ observation of the anode surface. precipitation of cuso4 and rapid crystalline growth are observed upon dissolving pure copper (99.999 wt%), and its behavior is compared to the reaction of copper alloys.
||Planned: A print-only volume