Protective Iron Carbonate Films—Part 2: Chemical Removal by Dissolution in Single-Phase Aqueous Flow

Ruzic, V., Veidt, M. and Nesic, S. (2006) Protective Iron Carbonate Films—Part 2: Chemical Removal by Dissolution in Single-Phase Aqueous Flow. Corrosion, 62 7: 598-611. doi:10.5006/1.3280674

Author Ruzic, V.
Veidt, M.
Nesic, S.
Title Protective Iron Carbonate Films—Part 2: Chemical Removal by Dissolution in Single-Phase Aqueous Flow
Journal name Corrosion   Check publisher's open access policy
ISSN 0010-9312
Publication date 2006-07-01
Sub-type Article (original research)
DOI 10.5006/1.3280674
Open Access Status Not yet assessed
Volume 62
Issue 7
Start page 598
End page 611
Total pages 14
Editor Ira Perry
Place of publication Houston
Publisher NACE International
Language eng
Subject C1
250107 Electrochemistry
290502 Industrial Engineering
291899 Interdisciplinary Engineering not elsewhere classified
671099 Fabricated metal products not elsewhere classified
671710 Fabricated metal products
671504 Industrial machinery and equipment
Formatted abstract
The dissolution of deposited, protective iron carbonate films in oil and gas transportation pipelines may drastically enhance corrosive processes on steel surfaces, and thus, seriously affect the longevity of the equipment in use. An investigation had been carried out to get a better understanding of the kinetics and underlying mechanism of film dissolution, as well as to provide baseline data for further study of the possible synergistic effect between chemical and mechanical film removal. To address this goal, a series of iron carbonate film dissolution experiments was conducted covering a wide range of pH values (pH 3 to pH 6.1) and Reynolds numbers (Re = 3.68 × 103 to 1.84 × 105) using a rotating cylinder configuration. The polarization resistance technique was used for implicit quantification of film removal kinetics via corrosion rate monitoring, whereas scanning electron microscopy was utilized for the purpose of residual film characterization. The results suggested that chemical film dissolution was governed by mass transfer and showed the strong dependence of film removal kinetics on the level of saturation in the solution (pH value) and fluid velocity. In addition, the physical mechanism of chemical film removal has been explained and discussed in light of the obtained results.
Keyword Materials Science, Multidisciplinary
Metallurgy & Metallurgical Engineering
Carbon Dioxide Corrosion
Film Dissolution
Mass-transfer Control
Protective Iron Carbonate Film
Rotating Cylinder Electrode
Turbulent Single-phase Flow
Turbulent Taylor-couette Flow
Turbulent Impinging Jet
Crystalline Surfaces
Disturbed Flow
Q-Index Code C1
Additional Notes Product Number: 32141-06070598-S

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Created: Wed, 15 Aug 2007, 17:59:48 EST