1. Corrosion inhibition of steel in seawater through surface phosphate formed from oil.
- Author
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Poon, Jeffrey, Madden, David C., Welbourn, Rebecca J.L., Allen, Finian J., Khan, Fahmida, Sonke, Hans, and Clarke, Stuart M.
- Subjects
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NEUTRON reflectometry , *STEEL corrosion , *PHOSPHATES , *SEAWATER corrosion , *SEAWATER , *CARBON steel , *MILD steel - Abstract
Bis(2-ethylhexyl) phosphate (BEHP) was exposed to carbon steel surfaces from dry and water-saturated dodecane. The resulting changes to the surfaces were characterised using spectroscopic techniques (energy dispersive X-ray (EDX), X-ray photoelectron (XPS), and far-infrared reflection absorption (RAIRS) spectroscopies) and polarised neutron reflectometry (PNR). Although there was no observable affinity of BEHP to the steel surface in dry solvent, a layer of rough iron (III) phosphate formed in water-saturated dodecane. The phosphate-reacted steel surface showed some resistance to corrosion by seawater, suggesting the formation of a cohesive barrier against corrosive species. The results support the use of BEHP as an anti-corrosion additive and a viable phosphating agent for steel surfaces. [Display omitted] • Bis(2-ethylhexyl) phosphate indifferent to steel/iron surface in dry dodecane • Organic phosphate-steel reaction immediately initiated on addition of water. • Iron (III) phosphate layer forms from reaction and provides corrosion protection. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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