Corrosion Inhibitors in Cooling Water Systems

Чиркунов, А. А.; Kuznetsov, Yu. I.

doi:10.1016/b978-0-444-63228-9.00004-8

Cited by 10 publications

(12 citation statements)

References 70 publications

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“…It should be noted that a similar mechanism of protection can be realized in the case of polycarboxylates, among which polyacrylic, polyaspartic and 2-phosphonobutane-1,2,4-tricarboxylic acids as well as their zinc complexes are most famous [1,79,80].…”

mentioning

confidence: 99%

Organic corrosion inhibitors: where are we now? A review. Part II. Passivation and the role of chemical structure of carboxylates

Kuznetsov

2016

Int. J. Corros. Scale Inhib.

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This article provides an overview of works (2006)(2007)(2008)(2009)(2010)(2011)(2012)(2013)(2014)(2015)(2016) devoted to the passivation of various metals and the influence of organic carboxylic acids and their salts thereon. The results of corrosion and electrochemical studies, as well studies on the composition and structural features of surface layers on the metals being protected by a variety of physicochemical methods are considered. Protection of metals by organic corrosion inhibitors (CIs) is based mostly on the adsorption of these compounds on a metal surface and subsequent formation of protective layers that minimizes access of corrosive ions to that surface. Adsorption can occur via electrostatic interaction of the CI with the metal substrate (physisorption), or it can involve charge sharing between the surface and CI (chemisorption), or combination of both interaction types can take place. Passivation of metals remains a central problem to be solved by the corrosion science. In the development of nanoindustry methods focused on creating ultrathin layers on metals capable of preventing the corrosion of the metals, an important role is played by surface passivation using CIs. Corrosion inhibitors can form passivating (often polymolecular) layers on metals but with thickness d < 10 nm, making them invisible to an unaided eye and keeping intact the decorative properties of a coated article's surface. This passivation can be done using volatile CIs from the vapor phase or nonvolatile CIs from aqueous solutions. Since metal passivation using conventional corrosion inhibitors of oxidizing type (e.g., nitrites, chromates) is seriously limited in practice due to environmental considerations, requirements for inhibiting formulations keep changing over time.The use of corrosion inhibitors in passivation has played a major role not only in the application of oxidants (chromates, nitrites, etc.) but also in adsorptive, often "oxideless" passivation that we discovered as early as in the mid-1970s [1]. As for corrosion inhibitors

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confidence: 99%

Organic corrosion inhibitors: where are we now? A review. Part II. Passivation and the role of chemical structure of carboxylates

Kuznetsov

2016

Int. J. Corros. Scale Inhib.

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“…Among all structural materials, carbon steel suffers the most from corrosion, giving rise to the need for corrosion inhibitor in CCWS. (Chirkunov and Kuznetsov, 2015; Sezer and Öztürk, 2019).…”

Section: Introductionmentioning

confidence: 99%

“…Various types of corrosion inhibitor exist for CCWS. Inorganic inhibitors include chromate, phosphate, nitrite and molybdate (Breckenridge, 2014; Chirkunov and Kuznetsov, 2015; Colombo et al , 2018). Chromate, an oxidizing type inhibitor, possesses a high protective effect for various materials that has been proven in industry for a longtime.…”

Section: Introductionmentioning

confidence: 99%

“…Molybdate acts as an anodic type inhibitor by promoting the formation of a thin layer of ferric molybdate and thus hindering the anodic reaction (Ahmad et al , 2019). Its function relies on another oxidant to provide ferric ions (Chirkunov and Kuznetsov, 2015; Mosayebi et al , 2002; Vukasovich and Robitaille, 1977). The combination of molybdate with nitrite has been proposed by several authors (Mustafa et al , 1997; Yee et al , 2019).…”

Section: Introductionmentioning

confidence: 99%

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Optimization and understanding of corrosion inhibitors for cooling water system

Zhu

Wang

et al. 2023

ACMM

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Purpose Two corrosion inhibitors for closed cooling water systems, nitrite-based and mixture of nitrite and molybdate corrosion inhibitor, are often compared to each other. This study aims to optimize these two inhibitors in terms of concentration and pH for carbon steel protection, with insights into the double layer structure on surface and its impact on corrosion inhibition. Design/methodology/approach Electrochemical analysis including electrochemical impedance spectroscopy and potentiodynamic test are carried out for quick assessment of corrosion inhibition efficiency and optimization, which is confirmed by immersion test and microscopic analysis. The electronic properties of the surface film are analyzed through Mott–Schottky method which provides new insights into the inhibition mechanism and the role of each component in mixture inhibitor. Findings Mixture of nitrite and molybdate is shown to present higher inhibition efficiency, owning to the double layer structure. Nitrite alone can form a protective surface film, whereas molybdate leads to an n-type semiconductive film with lower donor density, hence giving rise to a better inhibition effect. Research limitations/implications Surface after inhibitor treatment has been carefully characterized to the microscopic scale, implying the effect of micro-structure, chemical composition and electronic properties on the corrosion resistance. Inorganic corrosion inhibitors can be tuned to provide higher efficiency by careful design of surface film structure and composition. Originality/value Almost every study on corrosion inhibitor applies such method for quick assessment of corrosion inhibition effect. Mott–Schottky test is one of electrochemical methods that reveals the electronic properties of the surface film. Previous works have studied the surface layer mainly through X-ray photoelectron spectroscopy. This study provides another insight into the surface film treated by nitrite and molybdate through Mott–Schottky analysis, and relates this structure to the corrosion inhibition effect based on multiple analysis including electrochemistry, microscopic characterization, thermodynamics and interface chemistry.

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“…protection against corrosion, scaling and biofouling of circulating cooling systems is particularly important for trouble-free operation of the refinery. This problem and its efficient solutions have been repeatedly discussed in the scientific literature for more than half a century [6,8,[10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Progress in the inhibition of metal corrosion and the prospects of its use in the oil and gas industry

Kuznetsov¹,

Чиркунов²,

Семилетов³

2019

Int. J. Corros. Scale Inhib.

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A brief review of the main scientific areas of research and development of efficient corrosion inhibitors of metals (CIs) and their application methods is given. Temporary protection against atmospheric corrosion of steel pipes and equipment for storage (at least one year) or during transportation is often achieved by passivation using aqueous solutions of non-toxic CIs. They efficiently protect not only steel, but also copper or aluminum alloys; therefore, they successfully replace environmentally hazardous passivating solutions, not only nitrite but also chromate ones. Such solutions are often based on salts of higher carboxylic acids, for example, oleic acid or oleoylsarcosine. Temporary protection includes the use of vapor phase CIs, which, in addition to traditional volatile CIs, include the recently proposed so-called chamber CIs. A relatively new and rapidly developing method of temporary protection of metals is the superhydrophobization of their surface, which provides water contact angles θ above 150°. CIs are used in solutions of strong acids that are injected into the reservoir to increase oil production and in H 2 S-containing media in the fight against corrosion and hydrogenation. Examples of CI applications in paint systems, and more precisely in the primer layer, where they are introduced being immobilized in micro or macro containers to prevent the adverse effect of a CI on the coating while maintaining a high efficiency of metal corrosion protection, are considered. To prevent the destruction of high-pressure gas pipelines, it is important to slow down not only steel corrosion, but also its stress corrosion cracking (SCC). The properties of CIs that are necessary for their use in polymer coatings to reduce the accident incidence rate due to SCC on gas pipelines are discussed.

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Corrosion Inhibitors in Cooling Water Systems

Cited by 10 publications

References 70 publications

Organic corrosion inhibitors: where are we now? A review. Part II. Passivation and the role of chemical structure of carboxylates

Organic corrosion inhibitors: where are we now? A review. Part II. Passivation and the role of chemical structure of carboxylates

Optimization and understanding of corrosion inhibitors for cooling water system

Progress in the inhibition of metal corrosion and the prospects of its use in the oil and gas industry

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