ISSN 2305-6894

2013, Vol. 2, Issue 3 (pp. 162–254)

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Volatile inhibitors of atmospheric corrosion. IV. Evolution of vapor-phase protection in the light of patent literature

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

Abstract: The review analyzes the patent literature dealing with metal protection by volatile corrosion inhibitors (VCIs) and materials based thereon. It has been found inhibitors of atmospheric corrosion with vapor pressure above 10–5 mmHg can be used as VCIs, including nitrogen-containing bases of various nature, salts of nitrogen-containing bases with some inorganic or organic acids, organic nitro compounds, esters of organic and inorganic acids, heterocyclic nitrogen-containing compounds, etc. Vapor-phase metal protection is also performed using non-volatile compounds and formulations that can release compounds of the above types upon hydrolysis. VCIs for temporary protection can be used in the form of active compounds, solutions, packaging materials, porous emitters, inhibited air, or in special forms intended for the protection of specific product types. VCIs can be used for permanent protection of metal articles within polymer coatings (paints) and working liquids (hydraulic, cooling liquids, etc.).

Int. J. Corros. Scale Inhib., , 3, 162-193 PDF (666 K)
doi: 10.17675/2305-6894-2013-2-3-162-193

Volatile inhibitors of atmospheric corrosion of ferrous and nonferrous metals. IV. Application of the VNKh-L-408 inhibitor in an electrostatic field

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All-Russia Research Institute of Petrochemical Processes, Zheleznodorozhnyi pr. 40, St. Petersburg, 192148 Russian Federation

Abstract: Some aspects of the application of VNKh-L-408 inhibitor in an electrostatic field (the kinetics of its evaporation from the surfaces of various metals, the causes of its higher efficiency upon electrostatic application, and the mechanism of its action) are discussed. A technology for electrostatic application of powdered inhibitor to metal surfaces has been developed.

Int. J. Corros. Scale Inhib., , 3, 194-202 PDF (580 K)
doi: 10.17675/2305-6894-2013-2-3-194-202

Laboratory assessment of the efficiency of corrosion inhibitors at oilfield pipelines of the West Siberia region IV. Tests in a flow recirculation loop

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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 article continues a series of publications dedicated to lab assessment of the efficiency of carbon dioxide corrosion inhibitors at oilfield pipelines of the West Siberia region. Results of the test in a flow recirculation loop are reviewed herein. The paper highlights the effect of temperature, test duration, oxygen concentration, condition of specimen surface, flow velocity, presence of hydrocarbon phase and inhibitor concentration on the corrosion rate and protective properties of a wide range of commercial inhibitors. The paper gives recommendations on specific conditions for testing inhibitors to assess their applicability for the protection of water lines, oil pipelines with low watercut and oil pipelines with high product watercut.

Int. J. Corros. Scale Inhib., , 3, 203–215 PDF (595 K)
doi: 10.17675/2305-6894-2013-2-3-203-215

Design and construction of a pilot scale heat exchanger-cooling tower system for scaling/deposition and inhibition studies

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Crystal Engineering, Growth and Design Laboratory, Department of Chemistry, University of Crete, Voutes Campus, Crete, GR-71003, Greece

Abstract: In this manuscript we present the design and construction of a pilot system that incorporates both a heat exchanger component and a cooling tower add-on. This prototype was constructed in order to simulate real industrial open recirculating cooling systems. Heat exchanger planning was realized using mass and energy balance. The application of mass balance was realized under permanent (static) conditions, whereas the application of energy balance was realized under non-permanent (dynamic) conditions, as it happens in a real industrial setting. Also, the necessary pump power was calculated in order for the cooling tower to function in a “cross-flow” fashion for most efficient water cooling. The pilot system allows the use of water of choice (either artificial or natural), the selection of different metallurgies for the heat exchanger, as well as monitoring of important metrics in the system (inlet and outlet temperatures, heat exchanger temperature, etc). The goal is to use this pilot system for sparingly-soluble salt precipitation and deposition studies.

Int. J. Corros. Scale Inhib., , 3, 216–223 PDF (1 186 K)
doi: http://dx.doi.org/10.17675/2305-6894-2013-2-3-216-223

Dissolution inhibition of bismuth, lead, tin and their ternary alloys in chloride solution

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1 Southern Federal University, ul. Zorge 7, Rostov-on-Don, 344090 Russian Federation
2 Rostov State University of Civil Engineering, ul. Sotsialisticheskaya 162, Rostov-on-Don, 344022 Russian Federation

Abstract: The behavior of bismuth, lead, tin, and their ternary alloys in 0.1 M NaCl solution in the presence of certain organic additives has been studied. The effect of 9-aminoacridine, benzimidazole, and oleate on metals and alloys has been compared. It has been found that the alloy composition affects the inhibition efficiency

Int. J. Corros. Scale Inhib., , 3, 224–230 PDF (562 K)
doi: doi:http://dx.doi.org/10.17675/2305-6894-2013-2-3-224-230

Selection of inhibited preservative materials for corrosion protection of gage parts (level transmitter torque tubes in primary and secondary oil processing units) and experience in application of such materials

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OOO NPO NEPhTEKhIM, ul. Pulkovskaya 10, St. Petersburg, 196158 Russian Federation.

Abstract: The reasons of initiation and development of local corrosion attack which is the most hazardous form of destruction of thin-walled tubes in level transmitters at oil processing units are examined. The protective effect of oil-based preservation materials with respect to nickel and copper-nickel alloys in hydrocarbon media containing chlorides and sulfur compounds has been studied. Laboratory studies and industrial tests have shown that the highest protective effect is provided by M-1 inhibitor at 5 mass% concentration in PES-5 silicone oil. The formulation is successfully used for the protection of torque tubes in liquid level transmitters at primary and secondary oil processing units.

Int. J. Corros. Scale Inhib., , 3, 231–244 PDF (1 170 K)
doi: 10.17675/2305-6894-2013-2-3-231-244

Optimization of corrosion protection economics

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Derzhavin State University, Internatsyonalnaya Str., 33, Tambov, 392000, Russian Federation

Abstract: An equation relating corrosion losses and expenditures for anti-corrosion measures is suggested. A formula for the absolute value of the economic efficiency of anti-corrosion protection is introduced.

Int. J. Corros. Scale Inhib., , 3, 245–254 PDF (704 K)
doi: 10.17675/2305-6894-2013-2-3-245-254

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