Understanding the Corrosion Behavior of the AZ91D Alloy in Simulated Body Fluid through the Use of Dynamic EIS

Husnu Gerengi; Marina Cabrini; Moses M Solomon; Ertugrul Kaya

doi:10.1021/acsomega.2c00066

Understanding the Corrosion Behavior of the AZ91D Alloy in Simulated Body Fluid through the Use of Dynamic EIS

ACS Omega. 2022 Mar 29;7(14):11929-11938. doi: 10.1021/acsomega.2c00066. eCollection 2022 Apr 12.

Authors

Husnu Gerengi^{1

2}, Marina Cabrini², Moses M Solomon³, Ertugrul Kaya¹

Affiliations

¹ Corrosion Research Laboratory, Department of Mechanical Engineering, Faculty of Engineering, Düzce University, 81620 Düzce, Turkey.
² Department of Engineering and Applied Sciences, University of Bergamo, 24044 Bergamo BG, Italy.
³ Department of Chemistry, College of Science and Technology, Covenant University, Canaanland, Km10, Idiroko Road, 112104 Ota, Ogun State, Nigeria.

Abstract

Dynamic electrochemical impedance spectroscopy (dynamic EIS) has the capacity to track changes on surfaces in a changing corrosive system, an advantage it holds over classical EIS. We used the dynamic EIS approach to provide insight into the corrosion behavior of the AZ91D Mg alloy in simulated body fluid for 30 h at 25 °C. The results reveal that the impedance response of the alloy is influenced by the immersion time. Between 0 and 7 h, impedance with three time constants was obtained, whereas two-time-constant impedance spectra were obtained between 8 and 30 h of immersion. The results confirm the breakdown of the corrosion product at longer immersion times.