Session: Advancements and Applications of Volatile/Vapor Corrosion Inhibitors (VCIs)
Quantification of Airspace Transport Kinetics of Volatile Corrosion Inhibitors Using Metal Oxide Gas Sensors (C2026-00415)
Monday, March 16, 2026
2:00 PM - 2:30 PM Central
Location: 371 DE
Earn .5 PDH
Interested in reading the entire paper? Click on the "Paper" button below to read on the AMPP Knowledge Hub!
*Please note, if your registration came with access to the conference proceedings don't forget to login to your AMPP Knowledge Hub account to access the paper for free. If you login and don't have access to the paper, you can purchase the individual paper or purchase the entire conference proceedings on your Knowledge Hub account.
Northern Technologies International Corporation - Zerust Integrity Solutions
Volatile corrosion inhibitors (VCIs) are widely used to mitigate corrosion in enclosed systems such as aboveground storage tank (AST) soil-side bottoms, pipe casing annuli, and complex piping networks by providing a protective airspace environment. Current industry evaluations, such as the VIA “jar test” (NACE TM0208), focus on end-state protectiveness; however, they offer limited understanding of the fundamental transport phenomena that govern VCI performance. This study proposes an integrated experimental and modeling framework aimed at quantifying the kinetics of VCI generation, propagation, and depletion. The approach utilizes metal oxide semiconductor (MOS) chemiresistive sensors, complemented by colorimetric detection, to monitor transient VCI concentrations in controlled bench-scale jar tests and simplified pipeline geometries. Experimental data were used to develop unsteady advection–diffusion–reaction models based on dimensionless numbers, yielding estimates for kinetic generation and effective diffusivity. Results showed good agreement between colorimetric analysis, sensor data, and model predictions.
