Corrosion Performance of Low Alloy Steels in Sub-Arctic Natural Seawater

Chernov, B. B.; Chaves, Igor A.; Nugmanov, A. M.; Melchers, Robert E.

doi:10.5006/2951

Cited by 7 publications

(5 citation statements)

References 19 publications

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“…From the Table, it can be seen that the average corrosion rate of control coupons without protection was 0.069 mm y -1 , and the corrosion rates of protected coupons, depending on the protection current, were in the range 0.009-0.074 mm y -1 . The results on corrosion of coupons without protection were in agreement with the previous corrosion tests of shipbuilding low alloy steels in similar waters of the Amursky Bay [18]. The coupons protected by currents of 231 mA m -2 and 463 mA m -2 had the lowest corrosion rates of 0.013 mm y -1 and 0.009 mm y -1 , respectively, which indicates their protective effect up to 86%.…”

Section: Results and Its Discussionsupporting

confidence: 89%

Principles of Cathodic Protection Using Solar Panels for Marine Structures Located Away from Stationary Electric Power Sources

Chernov¹,

Vu²,

Nugmanov³

2020

dteees

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The operability of the device for cathodic protection of metals in natural seawater using the solar panel as the only direct current source was experimentally studied. It was shown that the cathode device, powered only by a solar battery, allows cathodic protection of marine structures with a degree of protection of up to 86% without the use of additional energy sources. Protection is achieved by the formation of calcareous coatings in the daytime, which provide protection in the nighttime, when the cathode current is absent.

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Section: Results and Its Discussionsupporting

confidence: 89%

Principles of Cathodic Protection Using Solar Panels for Marine Structures Located Away from Stationary Electric Power Sources

Chernov¹,

Vu²,

Nugmanov³

2020

dteees

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show abstract

“…The remaining thickness of specimens was obtained through an optical 3D digitizing system, and the study evaluated the mechanical properties of the steel specimens. Chernov et al (2018) reported observations related to corrosion progress in ship structural steel exposed to Sub-Arctic water as well as temperate water, and compared the corrosion behaviour.…”

Section: Introductionmentioning

confidence: 99%

Fresh and sea water immersion corrosion testing on marine structural steel at low temperature

Rajput

Park

Noh

et al. 2019

Ships and Offshore Structures

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The aim of the present study is to experimentally examine the corrosion progress characteristics of steel associated with fresh and sea water immersion at low temperatures. Three types of steel, namely mild steel (Grade A) and high tensile steel (Grades A and D) are tested under various corrosive conditions in the fresh water, in the sea water and in the air at a temperature of 18°C, 0°C and-10°C. Mass loss of test specimen due to corrosion is measured at a monthly interval and it is converted to a loss of steel plate thickness. Based on the test database, the effects of parameters affecting the corrosion progress are discussed. Test database obtained in the present study are documented.

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“…With an excess of extraneous electrolyte, transfer under the action of an electric field is not required, and the distribution of the concentrations of hydroxide, hydrocarbonate and carbonate ions (C1, C2 and C3, respectively) in the diffusion layer is determined by their diffusion transport taking into account the homogeneous carbonate equilibrium (3). Determining the distribution of concentrations of hydroxide ions, bicarbonate ions, and carbonate ions in the diffusion layer with possible co-crystallization of calcium carbonate and magnesium hydroxide is reduced to the solution of the system [8]…”

Section: Theoretical and Experimental Study Of Calcareous Deposit Formentioning

confidence: 99%

“…Seawater is a very aggressive corrosive medium for various metal structures, depending on the nature of the metal, the chemical and microbiological composition of seawater and its physicochemical characteristics. The accumulated centuries-old experience of experimental study of corrosion losses and numerous theoretical works still do not allow understanding the subtleties of the process of metal corrosion in natural sea water [1][2][3]. Despite this, most researchers believe that the most effective protection of low-alloy steels in seawater is cathodic protection, the essence of which lies in imposing an external cathode current on the protected product.…”

Section: Introductionmentioning

confidence: 99%

Cathodic protection of structures in seawater using solar panels

Chernov

Nugmanov

et al. 2019

E3S Web Conf.

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It is well known that the cathodic protection of structures in seawater is accompanied by the formation of calcareous deposits on them. In current study, we consider the physicochemical modelling of the formation of the deposit composition against cathode current density in seawater. The reliability of the model representations is confirmed by direct experiments. The work also studied the protective properties of the deposits with a different composition for low-alloy steels in natural sea water. It has been shown that the deposits of pure Mg(OH)2 and the deposits of CaCO3 + Mg(OH)2 had better protective ability against corrosion than the deposits of pure CaCO3. However, the deposits of Mg(OH)2 dissolved faster than the deposits of CaCO3 and CaCO3 + Mg(OH)2. Theoretical concepts and experiments on the laws governing the formation of the deposits and their protective properties are in complete agreement with each other. This allows to use the obtained patterns in the cathodic protection of structures in sea water using solar panels, forming standard deviations with predetermined protective properties in the daytime.

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Corrosion Performance of Low Alloy Steels in Sub-Arctic Natural Seawater

Cited by 7 publications

References 19 publications

Principles of Cathodic Protection Using Solar Panels for Marine Structures Located Away from Stationary Electric Power Sources

Principles of Cathodic Protection Using Solar Panels for Marine Structures Located Away from Stationary Electric Power Sources

Fresh and sea water immersion corrosion testing on marine structural steel at low temperature

Cathodic protection of structures in seawater using solar panels

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