Erosion-corrosion of mild steel in hot caustic. Part I: NaOH solution

Rihan, R. O. and Nesic, S. (2006) Erosion-corrosion of mild steel in hot caustic. Part I: NaOH solution. Corrosion Science, 48 9: 2633-2659. doi:10.1016/j.corsci.2005.09.018

Author Rihan, R. O.
Nesic, S.
Title Erosion-corrosion of mild steel in hot caustic. Part I: NaOH solution
Journal name Corrosion Science   Check publisher's open access policy
ISSN 0010-938X
Publication date 2006
Sub-type Article (original research)
DOI 10.1016/j.corsci.2005.09.018
Volume 48
Issue 9
Start page 2633
End page 2659
Total pages 27
Editor G. T. Burstein
Place of publication Oxford
Publisher Pergamon-Elsevier Science Ltd
Collection year 2006
Language eng
Subject C1
290501 Mechanical Engineering
660401 Industry
Abstract A novel apparatus, high-pressure/high-temperature nickel flow loop, was constructed to study the effect of the flow on the rate of erosion-corrosion of mild steel in hot caustic. It has been successfully used to measure the corrosion rate of 1020 steel in 2.75 M NaOH solution at a temperature of 160 degrees C and velocities of 0.32 and 2.5 m/s. In situ electrochemical methods were used to measure the corrosion rate such as the potentiodynamic sweep, the polarization resistance method, and electrochemical impedance spectroscopy (EIS). Also used were the weight-loss method and scanning electron microscopy (SEM). Eight electrodes/coupons were used to monitor the metal loss rate, four were placed at the low velocity section, while the other four were placed in the high velocity section. The first three coupons in each section were placed within the disturbed flow region, while the fourth was placed in a fully developed flow region. The corrosion rate of the coupons in the high velocity section was generally higher than that of the coupons in the low velocity section. One coupon in the disturbed flow region had a significantly higher corrosion rate than the others. (c) 2005 Elsevier Ltd. All rights reserved.
Keyword Materials Science, Multidisciplinary
Metallurgy & Metallurgical Engineering
Nickel Flow Loop
Mild Steel
Heat Exchanger
Test Section
Electrochemical Measurements
Disturbed Flow
Tube Heat-exchangers
Polarization Resistance Measurements
Temperature Aqueous Corrosion
Turbulent Impinging Jet
Crystalline Surfaces
Tafel Slopes
Porous Oxide
Bayer Liquor
Q-Index Code C1

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Created: Wed, 15 Aug 2007, 08:21:37 EST