Abstract
The effects on the hydriding behavior, long term storability in air and microstructure of Mg 2Ni alloy resulting from surface treatments using (1) HCl acid (HCl-treatment), (2) F-containing solution after HCl etching (HCl + F-treatment) were determined and compared with those due to (3) F-treatment alone. Both the treatments (1) and (2) could clean up the originally contaminated surface as F-treatment did. HCl leached some pure Mg phase from the eutectic structure of the Mg-rich Mg 2Ni alloy. This resulted in an increase of specific surface area and led Mg 2Ni to partially hydride under very moderate temperature and pressure conditions. HCl-treatment alone could not form a fluorinated surface structure as F-treatment did. Instead of this, some magnesium hydroxide was formed. The fluorinated surface formed by F-treatment provided strong protection from surface contamination by long term air exposure.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have