Comparison of elemental resolved non-confined and restricted electrochemical degradation of nickel base alloys

Dworschak, Dominik; Cheng, Hsiu-Wei; Ku, Ching-Shun; Chiang, Ching-Yu; Lin, Chia-Hsien; Valtiner, Markus

doi:10.1016/j.corsci.2021.109629

Record link:

http://hdl.handle.net/20.500.12708/18048
https://doi.org/10.34726/1141

Title:

Comparison of elemental resolved non-confined and restricted electrochemical degradation of nickel base alloys

Citation:

Dworschak, D., Cheng, H.-W., Ku, C.-S., Chiang, C.-Y., Lin, C.-H., & Valtiner, M. (2021). Comparison of elemental resolved non-confined and restricted electrochemical degradation of nickel base alloys. Corrosion Science, 190, 1–8. https://doi.org/10.34726/1141

reposiTUm DOI:

10.34726/1141

Publisher DOI:

10.1016/j.corsci.2021.109629

Publication Type:

Article - Original Research Article

Language:

English

Authors:

Dworschak, Dominik
Cheng, Hsiu-Wei
Ku, Ching-Shun
Chiang, Ching-Yu
Lin, Chia-Hsien
Valtiner, Markus

Organisational Unit:

E134-02 - Forschungsbereich Applied Interface Physics

Journal:

Corrosion Science

ISSN:

0010-938X

Date (published):

Sep-2021

Number of Pages:

Publisher:

PERGAMON-ELSEVIER SCIENCE LTD

Peer reviewed:

Yes

Keywords:

Nickel Base Alloy; ICP-MS; Restricted (confined) corrosion; Localized corrosion; Oxide breakdown; Synchrotron-XRF

Abstract:

Passive ﬁlm properties of nickel-base-alloys (NBAs) have been studied extensively, yet elemental resolved dissolution currents under corrosive conditions are less well studied. Here, we compare elemental dissolution currents during anodic polarization and repassivation under crevice and freely-exposed conditions for various NBAs using an ICP-MS ﬂow-cell approach. With a new sample design we can track communication of a crevice environment with the electrolyte, providing insight into crevice solution chemistry and solubility of passive ﬁlm-forming elements. Data indicates Mo can only form stable precipitate layers under openly corroding conditions. Local elemental depletion was further examined by XPS and nanometer resolved XRF.

Project title:

Ein molekularer Grenzflächenansatz: Dekodierung von einzelnen molekularen Reaktionen und Wechselwirkungen an dynamischen Fest-Flüssigkeitsgrenzflächen: 677663 (Europäischer Forschungsrat (ERC))

Project (external):

Österreichische Forschungsförderungsgesellschaft (FFG)

Project ID:

865864

Research Areas:

Materials Characterization: 100%

Science Branch:

Physik, Astronomie

License:

CC BY 4.0