Electrochemical Impedance Spectroscopy on 3‐D Inhomogeneous Surfaces Corrosion Inhibition of Carbon Steel in Weakly Acidic NaCl Solutions

Mitzlaff, M.; Hoffmann, Helmut; Jüttner, K.; Lorenz, W.J.

doi:10.1002/bbpc.198800304

Cited by 14 publications

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References 28 publications

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“…3) usually describe the carbon steel frequency response behavior in neutral aerated system. [11][12][13][14][15][16] Such depressed semicircles can be interpreted as a deviation of the double-layer behavior from the ideal capacitance due to, e.g., surface inhomogeneity. This behavior can be modeled using a constant phase element (CPE) instead of capacitance, where the empirical exponent ␣ could be caused by surface inhomogeneity.…”

Section: Resultsmentioning

confidence: 99%

Effects of Bivalent Cations on Corrosion Inhibition of Steel by 1‐Hydroxyethane‐1,1‐diphosphonic Acid

Felhősi

Keresztes

Kármán

et al. 1999

J. Electrochem. Soc.

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The influence of calcium and zinc ions on the corrosion inhibition effect of 1‐hydroxyethane‐1,1‐diphosphonic acid (HEDP) on carbon steel has been investigated by electrochemical techniques, X‐ray photoelectron spectroscopy, and atomic force microscopy. Addition of calcium or zinc ions greatly increased the inhibition efficiency of HEDP in a synergistic manner. The highest inhibition effect was obtained for molar ratios of Ca/HEDP = 0.5 and Zn/HEDP = 3 for 3×10−4 mol dm−3HEDP . The corrosion inhibition mechanism in the presence of these additives proved to be different from that with HEDP alone and was related to the formation of different complex species between HEDP and cation additives. The frequency response of the studied system was described by a transfer function containing two relaxation time constants corresponding to the charge‐transfer process and the porous oxide layer. Higher zinc and phosphorous content in the inhibitor layer and a continuous change in the O‒Fe and HO‒Fe ratio were achieved by increasing zinc concentration in the solution (in the range Zn/HEDP = 0.5–3) as supported by XPS measurements. Changes in the chemical structure were established in the oxide‐hydroxide layer developed spontaneously on the steel surface. The synergistic effect of inhibitor compounds appeared also in surface morphology, leading to the development of smooth, i.e., dense, protective layers as revealed by atomic force microscopy. © 1999 The Electrochemical Society. All rights reserved.

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Section: Resultsmentioning

confidence: 99%

Effects of Bivalent Cations on Corrosion Inhibition of Steel by 1‐Hydroxyethane‐1,1‐diphosphonic Acid

Felhősi

Keresztes

Kármán

et al. 1999

J. Electrochem. Soc.

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Novel Electrochemical Techniques in Corrosion Research

Grundmeier

Jüttner

Stratmann

2013

Materials Science and Technology

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The sections in this article are Introduction Experimental Investigation of Corrosion Reactions by Analysis of the Corrosion Products Experimental Investigation of Corrosion Reactions by Following the Chemical Reaction Rate Experimental Investigation of Corrosion Reactions by Following the Rate of the Electrochemical Corrosion Reaction Electrochemical Impedance Spectroscopy and Noise Analysis Introduction The Principle of Dynamic System Analysis Measurement of the Electrochemical Impedance Presentation of Impedance Data Interpretation of Impedance Data The Polarization Resistance Frequency Dispersion Surface Inhomogeneities Single Layer Impedance Model Sandwich Layer Impedance Model Equivalent Circuit Versus Transfer Function The Transport Impedance Iron Corrosion in Neutral Solution Impedance Model of Passive Films Metal Dissolution and Active‐to‐Passive Transition Electrochemical Noise Noise Sources in Electrochemical Systems Noise Measurement Techniques Data Processing Noise Resistance and Polarization Resistance The Scanning Vibrating Electrode Technique Introduction History of Scanning Reference Electrodes Basic Principles of Localized Potential Mapping Localized Electrochemical Impedance Spectroscopy ( LEIS ) Applications of Modern Scanning Electrode Techniques Local Breakdown of Passivity Galvanic Corrosion Inhibition Microbiologically Influenced Corrosion Protective Polymeric Coatings Concluding Remarks Scanning Kelvinprobe Introduction Theory of the Vibrating Condenser Method The Relation between the Volta Potential Difference and Corrosion‐Relevant Properties Electrolyte Covered Metal Surfaces Metals in Humid Air Polymer‐Coated Metals Calibration of the Kelvinprobe Application of the Kelvinprobe: Atmospheric Corrosion Experimental Results Application of the Kelvinprobe: Corrosion Protection by Organic Coatings Experimental Polymer‐Coated Steel Polymer Coated Galvanized Steel Polymer Coated Aluminum Alloys Industrial Coatings Application of the Kelvinprobe: Corrosion Protection by Modified Metal Surfaces Metal Surfaces Modified by Monolayers of Organic Molecules Metal Surfaces Modified by Ultra‐Thin Plasma Polymers Metal Surfaces Modified by Inorganic and Organic Layers

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Environmentally Friendly Corrosion Inhibitors

Kálmán

Felhősi

Kármán

et al. 2013

Materials Science and Technology

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The sections in this article are Introduction Electrochemical Corrosion and Inhibition Routes to the Development of Corrosion Inhibitors Corrosion Inhibition by 1‐Hydroxy‐Ethane‐1,1‐Diphosphonic Acid ( HEDP ) Complexing Agent ( HEDP —Iron) Multifunctional Inhibitor Molecules N ‐Acyl Amino Acids The Impact of the Acyl Moiety and the Amino Acid Side Chain on the Corrosion Inhibition of Mild Steel Corrosion Inhibition of Stainless Steel by Acylated Amino Acids Interaction of Unsaturated Organic Inhibitors with Mild Steel Influence of Aryl and Aralkenyl Amino Acid Derivatives on Mild Steel Corrosion Inhibition Efficiency of Carboxy and/or Phosphonic Acids Inhibition of Copper by Benzo‐Hydroxamic Acids of Systematically Changed Structure Synergism Effect of Bivalent Cations on the Inhibition Efficiency of HEDP Adsorption of HEDP ‐Zn 2+ on a Gold Surface Impedance Study of Synergistic Inhibition Study of the Surface Morphology by AFM (Atomic Force Microscopy) Surface analytical Study of Corrosion Inhibition Mechanisms Effect of Surface Pretreatment Effect of Inhibitor Concentration Effect of Bivalent Cations on Inhibitor Adsorption Quantitative Relationships between the Chemical Structure and Efficiency of Corrosion Inhibitors Conclusions Acknowledgements

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Electrochemical Impedance Spectroscopy on 3‐D Inhomogeneous Surfaces Corrosion Inhibition of Carbon Steel in Weakly Acidic NaCl Solutions

Cited by 14 publications

References 28 publications

Effects of Bivalent Cations on Corrosion Inhibition of Steel by 1‐Hydroxyethane‐1,1‐diphosphonic Acid

Effects of Bivalent Cations on Corrosion Inhibition of Steel by 1‐Hydroxyethane‐1,1‐diphosphonic Acid

Novel Electrochemical Techniques in Corrosion Research

Environmentally Friendly Corrosion Inhibitors

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