Formation of protective surface films on carbon steel in mildly alkaline aqueous alkanolamine CO2 solutions
Source abstract
Abstract
Electrochemical impedance spectroscopy (EIS) and open circuit potential (OCP) measurements, complemented by solution speciation predictions and ex situ surface analyses, were used to investigate film formation on carbon steel in CO2 saturated methyldiethanolamine(aq) solutions at 80 °C, pH 7.9–8.6. Pure FeCO3 films, evidenced by OCPs of ca. −0.5 to −0.4 V (SHE), were formed under anoxic conditions and provided corrosion protection to the underlying substrate, increasing charge transfer resistances tenfold. O2 ingress caused a positive OCP shift to ca. > +0.35 V (SHE), resulting in formation of traces of iron oxide at the interface, which was less protective.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Corrosion Behavior and Inhibition · Concrete Corrosion and Durability · Hydrogen embrittlement and corrosion behaviors in metals
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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