Adsorption behaviour of film-forming amine on pre-oxidized carbon steel surface

Gui, Lin; Sun, Yunjuan; Liu, Canshuai; Fang, Jun; Song, Lijun; Liu, Bin

doi:10.1016/j.net.2021.10.025

Cited by 5 publications

(4 citation statements)

References 28 publications

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“…(6) No acetic acid and other low molecular weight organic acids were reported in ODA decomposition studies. (7) Only dissolved ODA can undergo decomposition. (8) At high ODA concentrations, the decomposition process is slow, with the maximum amount of decomposed ODA estimated at 40% for ODA concentration >20 mg/kg at the temperature of 160°C, while for ODA concentrations <20 mg/kg, the decomposed amount reached 95%, at the same temperature.…”

Section: Discussionmentioning

confidence: 99%

“…3,4,29,32,[34][35][36] The aliphatic groups are interconnected through attractive van der Waals forces, which enhance the adhesion of FFA onto the metal surface. Considering the lack of sufficient data and the existence of different theories, with some supporting a monolayer 27 and others favoring a multiple layer 7 adsorption mechanism, further research on this subject is warranted. According to the Technical Guidance Document, 15 the initial rapid formation of monomolecular layer is succeeded by a gradual development of a multilayer.…”

Section: Physical and Chemical Properties Of Ffamentioning

confidence: 99%

“…[1][2][3][4][5] Details about the layup conditions are given by Rziha. 6 FFA are added to the boiler feedwater to form a non-wettable film 7 on metal surfaces which functions as a physical barrier preventing contact between the metal wall and water or moisture containing corrosive impurities (e.g., oxygen). Consequently, this protects the steam generating equipment, such as feedwater, steam, and condensing systems, against corrosion and deposits formation.…”

Section: Introductionmentioning

confidence: 99%

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Thermal stability of film forming amines‐based corrosion inhibitors in high temperature power plant water solutions

Vidojkovic,

Mijajlovic,

Lindeboom

et al. 2023

Energy Science & Engineering

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Film forming amines (FFA) are corrosion inhibitors added to power plant water. The major concern associated with their application is the thermal stability in the high temperature power plant water medium, along with the risk of decomposition into low molecular weight organic acids that can cause corrosive damages in the water/steam cycle. However, there is still a lack of sufficient data on the thermal stability of FFA corrosion inhibitors. This paper presents a comprehensive critical review and state‐of‐the‐art assessment of the results obtained from studying the thermolysis of FFA corrosion inhibitors in power plant water/steam cycle conditions, highlighting the relevance for practical application and research needs. Temperature, exposure time, initial concentration, and alkalizing agents were identified as key factors influencing the thermal stability of FFA in high temperature power plant water. Organic acids are found in concentrations harmless to metal tubes. Advanced scientific background information and additional research are required on this topic.

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Section: Discussionmentioning

confidence: 99%

Section: Physical and Chemical Properties Of Ffamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermal stability of film forming amines‐based corrosion inhibitors in high temperature power plant water solutions

Vidojkovic,

Mijajlovic,

Lindeboom

et al. 2023

Energy Science & Engineering

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“…These are compounds that can form a nanometric adherent film on materials, limiting the contact between water and the base metal or passivating oxide and thus decreasing the corrosion rate [1][2][3]. Octadecylamine (ODA), an aliphatic amine with 18 carbon atoms, is the FFA most frequently employed for this purpose [4].…”

Section: Introductionmentioning

confidence: 99%

Development and validation of a liquid chromatography‐mass spectrometry method for quantification of octadecylamine in the secondary circuit of a nuclear power plant in the presence of other amines

Bosco Ackerman,

Martín,

Espinosa

et al. 2024

Separation Science Plus

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Octadecylamine (ODA) is the most widely used film‐forming amine in the nuclear industry. Its function is to minimize corrosion. In this work, we developed and validated a liquid chromatography‐mass spectrometry method that allows the quantification of ODA in the presence of other amines in the secondary system of nuclear power plants operating under all‐volatile treatment chemistry. Sample stabilities greater than 95% were achieved after 1 week of being taken in acetonitrile 1:1. The method showed a high selectivity allowing the measurement of ODA in the presence of other amines. The calibration curve was linear in the range of 0.0025–0.1025 mg/L. The limit of detection and limit of quantification (LOQ) were 1.8 and 2.2 µg/L, respectively for an injection volume of 3 µL. Lower LOQs can be achieved by increasing the injection volume, making the method applicable even in the first hours and days of treatment. The bias of the method was less than 10% and the relative standard deviation of reproducibility was less than 15%. The sample stabilization was robust and the uncertainty associated with the method was acceptable. The method was applied to a real sample taken after a few years of treatment and a concentration of 0.15 mg/L was measured.

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Effect of organic film on magnetite deposition behavior of alloy 690 steam generator tubes in simulated PWR secondary system

Lee

Jeon

Bae

et al. 2022

Journal of Materials Research and Technology

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Adsorption behaviour of film-forming amine on pre-oxidized carbon steel surface

Cited by 5 publications

References 28 publications

Thermal stability of film forming amines‐based corrosion inhibitors in high temperature power plant water solutions

Thermal stability of film forming amines‐based corrosion inhibitors in high temperature power plant water solutions

Development and validation of a liquid chromatography‐mass spectrometry method for quantification of octadecylamine in the secondary circuit of a nuclear power plant in the presence of other amines

Effect of organic film on magnetite deposition behavior of alloy 690 steam generator tubes in simulated PWR secondary system

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