Corrosion of the zinc negative electrode of zinc–cerium hybrid redox flow batteries in methanesulfonic acid
Corrosion of the zinc negative electrode of zinc–cerium hybrid redox flow batteries in methanesulfonic acid
Corrosion of zinc in aqueous methanesulfonic acid has been evaluated over a wide range of concentrations of acid (0.5–5 mol dm-3), dissolved zinc (0.5–2 mol dm-3), and electrolyte temperature (22–50 °C). The corrosion rate of zinc, in terms of weight loss and the volume of hydrogen evolved, varied with time and it was found to be highly dependent on the surface state and electrolyte conditions. With an initial active layer of zinc present, the corrosion rate rapidly increased following a decline when the proton concentration in the solution decreased to ca. 0.56 mol dm-3. Organic and inorganic inhibitors were added to the electrolyte to suppress the zinc corrosion in 1 mol dm-3methanesulfonic acid. The strong adsorption and blocking effects of cationic organic adsorption inhibitors, such as cetyltrimethyl ammonium bromide and butyltriphenyl phosphonium chloride, led to a significant decrease in zinc corrosion over a 10 h immersion period. With the addition of indium and lead ions inhibitors, the zinc surface showed less activity. Zinc corrosion continued to a smaller extent in the presence of these metallic inhibitors during the first few hours, but the metallic layer of the inhibitors did not cover the surface completely resulting in continued hydrogen evolution and making the inhibitors less effective at longer times.
1025-1035
Leung, P.K.
0a85d602-5141-41e5-8dbd-12873d5b9d4a
Ponce de Leon, Carlos
508a312e-75ff-4bcb-9151-dacc424d755c
Recio, F.J.
c1569d6a-c8ca-4987-8313-01ef4c6cf776
Herrasti Gonzalez, P.
4b72d0e4-f391-421a-ae54-a9ba3f5632fc
Walsh, F.C.
309528e7-062e-439b-af40-9309bc91efb2
17 August 2014
Leung, P.K.
0a85d602-5141-41e5-8dbd-12873d5b9d4a
Ponce de Leon, Carlos
508a312e-75ff-4bcb-9151-dacc424d755c
Recio, F.J.
c1569d6a-c8ca-4987-8313-01ef4c6cf776
Herrasti Gonzalez, P.
4b72d0e4-f391-421a-ae54-a9ba3f5632fc
Walsh, F.C.
309528e7-062e-439b-af40-9309bc91efb2
Leung, P.K., Ponce de Leon, Carlos, Recio, F.J., Herrasti Gonzalez, P. and Walsh, F.C.
(2014)
Corrosion of the zinc negative electrode of zinc–cerium hybrid redox flow batteries in methanesulfonic acid.
Journal of Applied Electrochemistry, 44 (9), .
(doi:10.1007/s10800-014-0714-y).
Abstract
Corrosion of zinc in aqueous methanesulfonic acid has been evaluated over a wide range of concentrations of acid (0.5–5 mol dm-3), dissolved zinc (0.5–2 mol dm-3), and electrolyte temperature (22–50 °C). The corrosion rate of zinc, in terms of weight loss and the volume of hydrogen evolved, varied with time and it was found to be highly dependent on the surface state and electrolyte conditions. With an initial active layer of zinc present, the corrosion rate rapidly increased following a decline when the proton concentration in the solution decreased to ca. 0.56 mol dm-3. Organic and inorganic inhibitors were added to the electrolyte to suppress the zinc corrosion in 1 mol dm-3methanesulfonic acid. The strong adsorption and blocking effects of cationic organic adsorption inhibitors, such as cetyltrimethyl ammonium bromide and butyltriphenyl phosphonium chloride, led to a significant decrease in zinc corrosion over a 10 h immersion period. With the addition of indium and lead ions inhibitors, the zinc surface showed less activity. Zinc corrosion continued to a smaller extent in the presence of these metallic inhibitors during the first few hours, but the metallic layer of the inhibitors did not cover the surface completely resulting in continued hydrogen evolution and making the inhibitors less effective at longer times.
Text
__soton.ac.uk_ude_PersonalFiles_Users_capla_mydocuments_Papers own and group_Corrosion of the ZnCe hydbrid RFB in MSA.pdf
- Version of Record
Restricted to Repository staff only
Request a copy
More information
Published date: 17 August 2014
Organisations:
Engineering Science Unit
Identifiers
Local EPrints ID: 371671
URI: http://eprints.soton.ac.uk/id/eprint/371671
PURE UUID: a00a8138-d101-487d-828d-1fdc76e859d3
Catalogue record
Date deposited: 12 Nov 2014 11:46
Last modified: 15 Mar 2024 03:22
Export record
Altmetrics
Contributors
Author:
P.K. Leung
Author:
F.J. Recio
Author:
P. Herrasti Gonzalez
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics