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- Title
Construction and Electrochemical Properties of Preferred Crystal Face (002) on Zn Anode Surface.
- Authors
Li, Weishun; Yun, Hong; Dai, Wenjing; Wang, Baofeng; Xu, Qunjie
- Abstract
Phosphoric acid etching combined with hydrothermal treatment was used to construct a Sc2O3-ZnO coating on the Zn anode surface to tune the content of Zn (002) crystal surface. The (002) crystalline surface of Zn surface became the preferred crystal face for the H3PO4 etching time of 7 min and hydrothermal reaction for 2 h at 160°C. The polarization curve results showed that in 2 M of ZnSO4 solution, the corrosion potential of Zn anode with (002) crystallographically optimal orientation was positively shifted by 663 mV and the corrosion current density was reduced by about four orders of magnitude compared with the bare Zn. The results of LSV and XRD showed that the Zn anode with (002) preferred crystal face possessed a more negative hydrogen evolution potential, which effectively hindered the occurrence of the H2 evolution side reaction and significantly inhibited the corrosion of metal Zn and the generation of alkaline zinc sulfate hydrate as a byproduct. Dense Sc2O3-ZnO coatings composed of crosslinked nanofibers provided a long-lasting and effective shielding protection. The coating facilitated the induction of Zn (002) crystal face oriented deposition, and the bonding of N or P enhanced the stability of coating, which significantly enhanced the corrosion resistance.
- Subjects
ANODES; CORROSION potential; CRYSTALS; ZINC sulfate; CRYSTAL surfaces; ZINC alloys
- Publication
JOM: The Journal of The Minerals, Metals & Materials Society (TMS), 2024, Vol 76, Issue 8, p3994
- ISSN
1047-4838
- Publication type
Article
- DOI
10.1007/s11837-024-06554-x