Long-Term Testing of Epoxy-Coated Steel in ASTM Seawater Using Electrochemical Impedance Spectroscopy

CORROSION ◽  
1991 ◽  
Vol 47 (6) ◽  
pp. 480-489 ◽  
Author(s):  
J. N. Murray ◽  
H. P. Hack
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Electrochemical Impedance ◽  
Coated Steel

Corrosion study on Al-rich metal-coated steel by odd random phase multisine electrochemical impedance spectroscopy

2014 ◽  
Vol 124 ◽  
pp. 165-175 ◽  
Author(s):  
A. Alvarez-Pampliega ◽  
T. Hauffman ◽  
M. Petrova ◽  
T. Breugelmans ◽  
T. Muselle ◽  
...  
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Electrochemical Impedance ◽  
Random Phase ◽  
Coated Steel ◽  
Corrosion Study

Long-Term SOFCs Button Cell Testing

2013 ◽  
Vol 11 (2) ◽  
Author(s):  
Gianfranco DiGiuseppe ◽  
Li Sun
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Current Density ◽  
Electrochemical Impedance ◽  
X Ray ◽  
Total Polarization ◽  
Scanning Electron

This paper reports a new study where relatively long-term tests of about a 1000 h are performed on several planar anode-supported solid oxide fuel cells. The cell electrochemical behaviors are studied by using voltage-current density measurement, electrochemical impedance spectroscopy, scanning electron microscopy, and energy-dispersive X-ray spectroscopy. The cell total polarization obtained from electrochemical impedance spectroscopy results is shown to be consistent with the area-specific resistance calculated from the voltage-current density curve over the course of the test. In addition, a four-constant phase element model is used to analyze the cell components resistances at different intervals over the lifetime of the test. Scanning electron microscopy and energy-dispersive X-ray spectroscopy are used postmortem to determine if any damages occurred to the cells and to determine if any change in composition occurred to the lanthanum strontium cobalt ferrite cathode. This study shows that the tested cells remain stable with a relatively small increase in the cell total polarization but with no increase in ohmic resistance.

scholarly journals Enhanced Corrosion Protection of Epoxy/ZnO-NiO Nanocomposite Coatings on Steel

Coatings ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 783 ◽  
Author(s):  
Muna Ibrahim ◽  
Karthik Kannan ◽  
Hemalatha Parangusan ◽  
Shady Eldeib ◽  
Omar Shehata ◽  
...  
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Corrosion Protection ◽  
Electrochemical Impedance ◽  
Sol Gel ◽  
Morphological Characterization ◽  
Coated Steel ◽  
X Ray ◽  
Edax Analysis

ZnO-NiO nanocomposite with epoxy coating on mild steel has been fabricated by the sol–gel assisted method. The synthesized sample was used to study corrosion protection. The analysis was performed by electrochemical impedance spectroscopy in 3.5% NaCl solution. The structural and morphological characterization of the metal oxide nanocomposite was carried out using XRD and SEM with Energy Dispersive Absorption X-ray (EDAX) analysis. XRD reveals the ZnO-NiO (hexagonal and cubic) structure with an average ZnO-NiO crystallite size of 26 nm. SEM/EDAX analysis of the ZnO-NiO nanocomposite confirms that the chemical composition of the samples consists of: Zn (8.96 ± 0.11 wt.%), Ni (10.53 ± 0.19 wt.%) and O (80.51 ± 3.12 wt.%). Electrochemical Impedance Spectroscopy (EIS) authenticated that the corrosion resistance has improved for the nanocomposites of ZnO-NiO coated along with epoxy on steel in comparison to that of the pure epoxy-coated steel.

The Improvement of Anticorrosive Technology for Pipeline in Panjin Oilfield

2012 ◽  
Vol 472-475 ◽  
pp. 2901-2904
Author(s):  
Li Ming Tang ◽  
Wen Jun Bi
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Electrochemical Impedance ◽  
Working Life ◽  
Anticorrosive Coating ◽  
Basic Work ◽  
Scanning Electron

The anticorrosive work for pipeline is a long-term basic work. It is significant for us to lengthen pipeline working life and enhance the operation reliability. In this article, the corrosive status in quo and reasons for pipeline in Panjin oilfield were narrated. In accordance with the corrosive characters, the new anticorrosive coating that epoxy heavy anticorrosive over-rust primer/IPN topcoat was opened up. In the lab, the anticorrosive coating by analyzed with electrochemical impedance spectroscopy (EIS), and scanning electron microscopy (SEM). The corrosion behavior of the new anticorrosive coating was compared with that of the traditional asphalt paint. The conclusion is that the epoxy heavy anticorrosive over-rust primer/IPN topcoat is superior to asphalt paint in anticorrosive properties.

Studies on Estimating Methods of Polarization Performance for Coated Steel in Seawater

2010 ◽  
Vol 654-656 ◽  
pp. 2418-2421 ◽  
Author(s):  
Yu Hong Qi ◽  
Zhan Ping Zhang ◽  
Mei Miao ◽  
Xia Zhen Zhang
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Potential Distribution ◽  
Cathodic Polarization ◽  
Electrochemical Impedance ◽  
Electrochemical Measurement ◽  
Coated Steel ◽  
Coating Properties ◽  
Polarization Data ◽  
Measured Polarization

The polarization curves and electrochemical impedance spectroscopy of coated steel after scratching cross-lines or cathodic polarization using COLT system connected to electrochemical workstation IM6ex in seawater are investigated and from the measured polarization data, potential distribution on hull surface under waterline are predicted using Beasy CP software. It is shown that an more pricise method for gaining polarization data of the coated steel in seawater is the electrochemical measurement carried out by COLT system and the method of scratching cross-lines or cathodic polarization for coating damage is simple and convenient for estimating the polarization data of a new coated hull that is closely related to the coating properties.

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