Langmuir-Blodgett films of dococyltriethylammonium bromide and octadecanol on iron. Deposition and corrosion inhibitor performance in CO2 containing brine
Knag, M.
,
Bilkova, K.
,
Gulbrandsen, E.
,
Carlsen, P.
,
Sjöblom, J.
Corrosion science, Vol. 48, no. 9 (September 2006), 2592-2613
- Publ. year
- 2006
- Publ. type
- article
- Abstract
- The stability and compressibility of Langmuir films of dococyltriethylammonium bromide (C22TAB) and 1-octadecanol (C18OH) and their mixtures on water surfaces were first investigated. Langmuir-Blodgett films were transferred onto iron substrate. Their effect on corrosion of iron in carbon dioxide containing brine were investigated by electrochemical methods. The C18OH formed a thin homogenous film with molecular area 19.4 Å2 at 36 mN m-1 at water surface. The films of C22TAB and C22TAB/C18OH mixtures were less dense, with 31 Å2 molecular area at 36 mN m-1 at water surface. The corrosion rate of iron substrate was reduced by 95% by deposition film of C18OH, while the corrosion rate of iron was reduced by 60% for films of C22TAB and C22TAB/C18OH mixtures. © 2005 Elsevier Ltd.
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