Corrosion behaviors of iron in a supercritical CO2 environment: a molecular dynamics study
Source abstract
Abstract
Corrosion caused by supercritical CO2 can cause serious damage to equipment. This study investigates the corrosion behaviors of iron in supercritical CO2 by molecular dynamics simulations via considering the effect of different factors including temperatures (T), the density of CO2 (ρCO2) and surface roughness of iron (λp). It is found that the corrosion process includes three stages. The first stage is dominated by CO2 diffusion. Rapid corrosion happens in the second stage, with a high reaction rate and plenty of corrosion products generated. In the third stage, these products prevent the reaction from proceeding and the system becomes stable. Moreover, it is demonstrated that the corrosion reaction is highly activated with T > 700 K. The ρCO2 has little effect on the corrosion rate, leading to the maximum reaction rates with different ρCO2 almost identical. The λp hardly affects the degree of corrosion but can accelerate the corrosion progress.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Corrosion Behavior and Inhibition · Subcritical and Supercritical Water Processes · Hydrogen embrittlement and corrosion behaviors in metals
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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