|
|||||
|
|
Langmuir-Blodgett films of dococyltriethylammonium bromide and octadecanol on iron. Deposition and corrosion inhibitor performance in CO2 containing brine |
|
| Authors: | Magne Knag Egil Gulbrandsen Johan Sjöblom |
| Affiliation: | a Ugelstad Laboratory, Department of Chemical Engineering, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway b Department of Chemistry, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway c Institute for Energy Technology, Materials and Corrosion Technology Department, P.O. Box 40, NO-2027 Kjeller, Norway |
| 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. |
| Keywords: | A Iron B EIS B Polarization C Acid inhibition C Interfaces |
| 本文献已被 ScienceDirect 等数据库收录！ | |