A comparison of electrochemical and analytical chemical methods for the determination of the corrosion rate with very efficient inhibitors

The technique for the determination of the rate of corrosion based on harmonic analysis was employed in the case of the corrosion of ARMCO iron electrode in sulphuric acid media inhibited with aromatic inhibitors. Simultaneously with the electrochemical measurements the rate of corrosion was also de...

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Bibliographic Details
Published inCorrosion science Vol. 37; no. 6; pp. 963 - 973
Main Authors Pirnát, A., Mészáros, L., Lengyel, B.
Format Journal Article
LanguageEnglish
Published Oxford Elsevier Ltd 01.06.1995
Elsevier Science
Subjects
Applied sciences
Corrosion
Corrosion mechanisms
Exact sciences and technology
Metals. Metallurgy
Analytical chemistry
Corrosion
Investigation method
Electrochemical method
Armco iron
Corrosion rate
Aromatic compound
Corrosion protection
Corrosion inhibitor
Sulfuric acid
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Summary:The technique for the determination of the rate of corrosion based on harmonic analysis was employed in the case of the corrosion of ARMCO iron electrode in sulphuric acid media inhibited with aromatic inhibitors. Simultaneously with the electrochemical measurements the rate of corrosion was also determined by solution analysis. A good agreement was obtained between the two methods when a proper surface treatment of the electrode was used. A comparison of the proposed technique with the method of polarization resistance revealed that the main sources of error of the latter technique, namely the error caused by the erroneous estimation of the Tafel slopes and the perturbation with relatively large amplitude, can be avoided by the use of the technique based on Faradaic distortion.
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ISSN:0010-938X
1879-0496
DOI:10.1016/0010-938X(95)00007-7