High-throughput investigation and finite element modelling of atmospheric corrosion on carbon steel under varying droplets
Source abstract
Abstract
A novel high-throughput platform enabling high-efficient preparation of droplet microarray and automatic characterization of corrosion morphologies was employed to investigate droplet corrosion on carbon steel. One hundred droplets with different compositions (NaCl and Na 2 SO 4 ), concentrations (from 0.4 wt.% to 4 wt.%) and pH values (3, 7 and 10) were obtained within 2 h. The average height of accumulated corrosion products ( H ) in neutral NaCl droplets decreased as NaCl concentration exceeded 2.4 wt.%, while H value in neutral Na 2 SO 4 droplets increased continuously with the increasing Na 2 SO 4 concentration. Finite element modelling confirmed that the high surface coverage of corrosion products in high-concentration NaCl droplets prohibited corrosion products accumulation. The less aggressive SO 4 2− resulted in a low surface coverage thereby enabling continuous corrosion products formation. For the influence of pH values, the corrosion rate in acidic environment (pH=3) was the largest due to the formation of non-protective γ-FeOOH and FeCl 2 , while the alkaline environment (pH=10) showed the least corrosion rate as more protective α-FeOOH was generated.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Corrosion Behavior and Inhibition · Hydrogen embrittlement and corrosion behaviors in metals · High-Temperature Coating Behaviors
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (54)
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