Cristin-resultat-ID: 1160683
Sist endret: 1. juni 2016, 23:31
NVI-rapporteringsår: 2014
Resultat
Vitenskapelig artikkel
2014

Influence of Ca2+ in deicing salt on the corrosion behavior of AM50 magnesium alloy

Bidragsytere:
  • Michael Grabowski
  • Daniel Bluecher
  • Michael Korte og
  • Sannakaisaa Virtanen

Tidsskrift

Corrosion
ISSN 0010-9312
e-ISSN 1938-159X
NVI-nivå 1

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2014
Publisert online: 2014
Trykket: 2014
Volum: 70
Hefte: 10
Sider: 1008 - 1023
Artikkelnummer: 1938-159X

Importkilder

Scopus-ID: 2-s2.0-84907821450

Beskrivelse Beskrivelse

Tittel

Influence of Ca2+ in deicing salt on the corrosion behavior of AM50 magnesium alloy

Sammendrag

To lower the freezing point of deicing salt, calcium chloride (CaCl2) is commonly used. The influence of the presence and absence of the deicing salt ingredient Ca2+ on the corrosion behavior of die-cast AM50 magnesium alloy was investigated using an electrolyte close to the deicing salt composition with and without Ca2+ addition. The goal of the work was to point out the differences in the corrosion mechanism with and with-out Ca2+ addition by electrochemical investigations, H2 evolution, and weight-loss characterization. Under polarizing conditions the resulting current densities are significantly lower in the presence of Ca2+. Electrochemical impedance spectroscopy (EIS) measurements up to 4.5 h showed an increasing polarization resistance, RP, with time, and after 4.5 h, a breakdown of RP values in the presence of Ca2+ combined with the appearance of an inductive loop. Mass-gain, mass-loss, and hydrogen evolution measurements confirmed the inhibiting behavior in the presence of Ca2+ up to 1 day. During immersion, the pH does not exceed a value of 10. Therefore, under these experimental conditions it is not possible for the system to reach the passivating pH of 12. The influence of the pH value on the corrosion rate was found to be limited in the pH region of 8 to 11.

Bidragsytere

Michael Grabowski

  • Tilknyttet:
    Forfatter
    ved Friedrich-Alexander-Universität Erlangen-Nürnberg
Aktiv cristin-person

Daniel Blücher

Bidragsyterens navn vises på dette resultatet som Daniel Bluecher
  • Tilknyttet:
    Forfatter
    ved Materialer og nanoteknologi ved SINTEF AS

Michael Korte

  • Tilknyttet:
    Forfatter
    ved Tyskland

Sannakaisaa Virtanen

  • Tilknyttet:
    Forfatter
    ved Friedrich-Alexander-Universität Erlangen-Nürnberg
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