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SUMMARY:Using Bipolar Electrochemistry to Probe the Efficacy of Passivation
  Layers for Reinforced Concrete Materials
LOCATION:Chemistry A101
TZID:America/Denver
DTSTART:20250506T160000
UID:2026-04-28-05-17-25@natsci.colostate.edu
DTSTAMP:20260428T051725
Description:About the Seminar:\n\nReinforced concrete (RC) structures are w
 idely used in construction applications to combine tensile strength with t
 he compressive strength of concrete alone. While RC materials are common i
 n buildings and roadways\, they suffer from deterioration resulting from c
 orrosion of the reinforcement material shortening service lifetimes. In th
 is work\, we propose the development of methodology to simulate environmen
 tal conditions and accelerate reinforcement aging using bipolar electroche
 mistry (BPEC) as a high through put screening method for passivation layer
 s. BPEC is an electrochemical technique that can be used to simulate both 
 anodic and cathodic environments within a single experiment on a single sa
 mple. This proposal aims to investigate the following: 1) how can BPEC be 
 used to accelerate onset of reinforcement deterioration and 2) how can BPE
 C experiments accelerate and inform on corrosion onset of passivation laye
 rs? For RC materials\, the anodic pole would simulate oxidation of the str
 ucture reinforcement leading to metal dissolution while the cathodic pole 
 would form hydroxyl ions (-OH) that would form a passivating oxide layer. 
 Accelerated deterioration would be supplemented by electrochemical testing
  such as electrochemical impedance spectroscopy (EIS) and linear sweep vol
 tammetry (LSV) to understand changes in passivation resistivity. The exten
 t of deterioration of the reinforcement would additionally be examined usi
 ng scanning electron microscopy (SEM)\, microstructure analysis using elec
 tron backscatter diffraction (EBSD) and X-ray photoelectron spectroscopy (
 XPS). With this work\, the aim is to develop methodology for accelerated a
 ging of reinforced materials to allow for high throughput screening of can
 didate passivation layer materials. 4:00 pm
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