Evaluation of Iron Mesoparticles Corrosion in Oils
The protocol to estimate Fe corrosion in oils was built up. Corrosion estimation was based on the determined concentrations of Fe(II) and Fe(III) that are formed in the corrosive media (e.g. oils) in course of metallic Fe particles corrosion. The spectrophotometric microanalysis technique was adopted to determine Fe(II) and Fe(III) concentrations, and corrosion is expressed as a fraction of Fe(II) and Fe(III) quantity of the initial Fe quantity. The protocol was tested by the experiments on the enforced corrosion of Fe particles in rapeseed and mineral SAE 10 oils containing antioxidants and Fe-particles stabilizing surfactants. The corrosion rates of Fe particles in the rapeseed and SAE 10 mineral oils depend on the particle sizes, as well as on the surfactant and reducing agents used for the synthesis of Fe particles directly in the oil phase by reverse micelles method.
Keyword(s): iron particles, corrosion, oil, lubrication, spectrophotometry
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