ISSN 2305-6894

2012, Vol. 1, Issue 1 (pp. 1-79)

Prev. issue <- -> Next issue

Welcome to the International Journal of Corrosion and Scale Inhibition

  • , and
A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow, 119071 Russian Federation

Abstract: An introduction to the International Journal of Corrosion and Scale Inhibition.

Int. J. Corros. Scale Inhib., , 1, 1-2 PDF (28 K)

New possibilities of metal corrosion inhibition by organic heterocyclic compounds

  • Yu. I. Kuznetsov
A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow, 119071 Russian Federation

Abstract: It is shown that many heterocyclic organic compounds, e.g., various azoles, are capable of adsorption on metals with formation of strong bonds with the surface. The approach based on the linear free energy relationship (LFER) principle offers a description of the efficiency of corrosion inhibition by these compounds and provides an understanding of the nature of chemical bonds formed by an organic inhibitor with a metal that needs to be protected. Knowledge of the specifics of interaction between azoles and metal surfaces can be helpful in choosing a promising corrosion inhibitor for drastic conditions, for example, in chemical mechanical planarization slurries where simultaneous mechanical polishing and electrochemical dissolution of the surface usually occur. Corrosion inhibition of steel at high temperatures (≥ 150°C) in mineral acid solutions is yet another example of a new successful use of azoles. It is demonstrated that new possibilities for improving the anticorrosive protection of metals are provided not only by using mixtures of some azoles with carboxylate-type organic corrosion inhibitors but also by constructing bilayer nanocoatings from aqueous solutions. For example, strong adsorption of small amounts of rather an exotic compound, dimegin (disodium salt of deuteroporphyrin), not only promotes the passivation of iron in neutral aqueous solutions but also impedes the local depassivation of the metal. Furthermore, it offers wide possibilities for further improvement of adsorption of other heterocyclic chemical compounds due to preliminary modification of the metal surface even by a small dimegin concentration.

Int. J. Corros. Scale Inhib., , 1, 3-15 PDF (1 758 K)
doi: 10.17675/2305-6894-2012-1-1-003-015

Volatile Inhibitors of Metal Corrosion. I. Vaporization

  • and
A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow, 119071 Russian Federation

Abstract: This paper presents an analytical review of data on the interaction of volatile corrosion inhibitors with the atmosphere, vaporization processes, methods of experimental and computational estimation of the vapor pressure of organic compounds, and effects of vaporization conditions and compound structure on vapor pressure.

Int. J. Corros. Scale Inhib., , 1, 16-25 PDF (760 K)
doi: 10.17675/2305-6894-2012-1-1-016-025

Effect of IFKhAN-92 inhibitor on scale removal during sulfuric acid pickling of steel

  • , and
1 A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow, 119071 Russian Federation
2 Moscow State Pedagogical University, ul. Malaya Pirogovskaya 1, bldg. 1, Moscow, 119882 Russian Federation

Abstract: An integrated study of the effect of IFKhAN-92 on steel pickling in sulfuric acid solutions has been carried out. The inhibitor studied significantly reduces the corrosion rate of the metal but does not hinder the scale removal. It has been shown that the electrochemical component of the scale pickling process is described by Erofeev’s equation of heterogeneous kinetics.

Int. J. Corros. Scale Inhib., , 1, 26-37 PDF (997 K)
doi: 10.17675/2305-6894-2012-1-1-026-037

Inhibition of carbon steel corrosion and hydrogen penetration into the metal in media containing H2S and CO2

  • , and
1 Tambov State Technical University, ul. Internatsional’naya 33, Tambov, 392622 Russian Federation
2 Derzhavin State University, ul. Sovetskaya 106, Tambov, 392000 Russian Federation

Abstract:

The efficiency of EM-9 product as a versatile inhibitor against carbon steel corrosion and hydrogen penetration into the metal in slightly acidic chloride-containing media (pH = 2 – 4; 50 g/l NaCl) containing hydrogen sulfide and carbon dioxide separately and in combination has been investigated. The EM-9 formulation is a process mixture of poly­aminoimidazolines, products of the reaction of tetraethylene pentamine with tall oil acids.

The bactericidal properties of the inhibitor have been investigated. The bactericidal ability of the inhibitor with respect to sulfate reducing bacteria (SRB) was estimated by two methods: i) reduction in the number of the microorganisms, ii) retardation of H2S formation by the microorganisms (iodometric titration).

The inhibitor favors the preservation of the mechanical properties of St3 and 65G steels under the same conditions and slows down the hydrogen diffusion across a St3 steel membrane. The latter was evaluated in an electrochemical hydrogen permeation Devanathan-type cell. The qualitative correlation between the slowdown of hydrogen diffusion through the steel membrane by the inhibitor and the preservation of the mechanical properties of steel in the presence of the inhibitor has been shown. The mechanical properties of steel have been estimated under conditions of stretching and bending stress after corrosion tests in uninhibited and inhibited solutions for 24 hours.

Thus, EM-9 is a versatile inhibitor that slows down the corrosion of carbon steel and hydrogen penetration into the metal in media containing H2S and CO2 separately or in combination. It shows a high bactericidal activity and the ability to preserve the mechanical properties of steel.

Int. J. Corros. Scale Inhib., , 1, 38-50 PDF (959 K)
doi: 10.17675/2305-6894-2012-1-1-038-050

Volatile inhibitors of atmospheric corrosion of ferrous and nonferrous metals. I. Physical and chemical aspects of selection of starting reagents and synthetic routes

  • , , , and
All-Russia Research Institute of Petrochemical Processes, ul. Pulkovskaya 10, St. Petersburg, 192148 Russian Federation

Abstract: The paper discusses the relationship between the physicochemical and electronic characteristics of various metals and molecular parameters of inhibitors that allows a better prediction of the efficiency of volatile inhibitors of atmospheric corrosion (VIACs) of ferrous and nonferrous metals. The high efficiency of commercial VNKh-L inhibitors based on Schiff and Mannich bases as VIACs is substantiated. It is demonstrated by analyzing the main molecular characteristics that products of complex condensation of nitrogen-containing compounds with aldehydes can serve as highly efficient VIACs.

Int. J. Corros. Scale Inhib., , 1, 51-64 PDF (613 K)
doi: 10.17675/2305-6894-2012-1-1-051-064

Laboratory assessment of the efficiency of corrosion inhibitors at oilfield pipelines of the West Siberia region. I. Objective setting

  • and
1 OJSC Transenergostroi, Derbenevskaya nab. 7, bldg. 10, Moscow, 115114 Russian Federation
2 A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow, 119071 Russian Federation

Abstract: This paper starts a series of publications dealing with the laboratory assessment of the performance of corrosion inhibitors for oilfield pipelines. Typical corrosion and inhibitor protection conditions in oilfield pipelines of the West Siberia region and existing approaches to the laboratory simulation of corrosion situations in oilfield pipelines are discussed. The simulation conditions and capabilities of laboratory test methods are compared.

Int. J. Corros. Scale Inhib., , 1, 65-79 PDF (1 319 K)
doi: 10.17675/2305-6894-2012-1-1-065-079

Prev. issue <- -> Next issue