Abstract
The occluded gas in Zn powder was studied by heating in vacuo and analysing the gas evolved by using a mass spectrometer. The results indicated that the electrolytic Zn powder evolved hydrogen in a quantity correlated to the particle size and shape of the powder and also to the degree of the crystal imperfections, which is shown by the X-ray diffraction broadening in {103}. It was also established that the H2 evolved was not formed from H2O but from the H2 occluded in Zn. In the case of Zn powders exposed to laboratory air, the gas evolved by heating in vacuo was composed of H2, CO2, CO and H2O. Of these CO proved to be a by-product from CO2 which reacted with heated Zn as H2 was formed from H2O. It was also established that ZnO alone could absorb CO2 and H2O and set free them as such. Thus it may be concluded that the surface of Zn particles, when oxidized, becomes coated with a basic Zn carbonate layer by absorbing CO2 and H2O.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of the Japan Institute of Metals and Materials
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
