Use of organic amines in water chemistry control for pressurized water reactor secondary systems

Passell, T.O.; Welty, C.S.; Hobart, S.A.

doi:10.1016/0149-1970(87)90007-2

Cited by 8 publications

(3 citation statements)

References 6 publications

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“…Using volatile amines such as morpholine and cyclohexylamine for alkalization and a bifunctional base such as hydrazine for deoxygenation/alkalization is known to inhibit corrosion in iron-base alloys. 13 However, their effect on the decomposition of Fe(OH) 2 at <373 K has not been reported yet. Since these additives act as weak complexing agents for the transition metal ions, [14][15][16][17][18] they can be expected to influence the decomposition Reaction (1).…”

Section: Corrosion-vol 49 Nomentioning

confidence: 98%

Stimulated Decomposition of Fe(OH)₂in the Presence of AVT Chemicals and Metallic Surfaces—Relevance to Low-Temperature Feedwater Line Corrosion

Joshi¹,

Venkateswaran²,

Venkateswarlu³

et al. 1993

CORROSION

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Alkalizing agents cyclohexylamine, morpholine, and hydrazine accelerate the base-induced decomposition of Fe(OH) 2 even at high pH levels by lowering the activation energy of the reaction. Efficient evolution of hydrogen is observed from Fe(OH) 2 suspension in the presence of hydrazine, while weakly stimulated evolution is observed in the presence of cyclohexylamine and morpholine. It appears that the concentration and complexing abilities of the additives critically determine the yield of hydrogen. Nickelcontaining surfaces such as NiO and Monel 400 † alloy (UNS N04400) apart from pure nickel also increase the H 2 yield from Fe(OH) 2 suspensions. These observations are related to corrosion occurring in the low-temperature portion of feedwater circuits of power plants.

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Section: Corrosion-vol 49 Nomentioning

confidence: 98%

Stimulated Decomposition of Fe(OH)₂in the Presence of AVT Chemicals and Metallic Surfaces—Relevance to Low-Temperature Feedwater Line Corrosion

Joshi¹,

Venkateswaran²,

Venkateswarlu³

et al. 1993

CORROSION

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“…Polyamine water treatment agents with film-forming amines as the main component have been used to inhibit metal corrosion in boiler steam-water systems in many industrial applications [6][7][8][9], since they can form a protective film which acts as a hydrophobic barrier against corrosive species, such as oxygen and carbonic acid [10][11][12][13]. In one study, a film-forming amine was defined by the general formula R 1 -[NH-(R 2 )-] n -NH 2 , where n is an integer between 0 and 7, R 1 is an unbranched alkyl chain with 12 to 18 carbon atoms and R 2 is a short-chain alkyl group that usually contains 1 to 4 carbon atoms [14].…”

Section: Introductionmentioning

confidence: 99%

Study on the Effect of Polyamine Water Treatment Agent on Metal Corrosion Inhibition in Boiler Steam–Water System

Zhao,

Cao,

Zhao

et al. 2024

Materials

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A polyamine water treatment agent was prepared with the film-forming amine (N-oleyl-1,3-propylenediamine) and the neutralizing amine (cyclohexanamine) under optimal conditions. The copper sulfate liquid drop experiment showed that a protective film was formed by the polyamine water treatment agent on carbon steel. The analyses of the polarization curve and electrochemical impedance spectroscopy of carbon steel indicated that the polyamine water treatment agent exhibited geometric effects, which could inhibit both anode and cathode reactions of carbon steel, and the corrosion inhibition effect of the polyamine water treatment agent showed an extreme-concentration phenomenon. A metal corrosion experiment in a simulated boiler steam–water system indicated that the polyamine water treatment agent mitigated the corrosion of carbon steel at different temperatures, and the corrosion inhibition rates of the polyamine water treatment agent in liquid and gas environments at 150 °C were 53.84% and 67.43%, respectively, better than that at 350 °C. SEM-EDS characterization indicated that the formation of the corrosion product, iron oxide, on the carbon steel was reduced with the addition of the polyamine water treatment agent in the simulated boiler steam–water system.

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“…Along with amine, hydrazine is injected to scavenge dissolved oxygen, and thereby produce reducing conditions. The treatment is called as an all volatile treatment (AVT), and the amines are used as AVT reagents [ 1 – 3 ]. Ammonia (earlier used) was replaced by cyclohexylamine and morpholine as AVT reagents because of their less volatility [ 3 , 4 ].…”

Section: Introductionmentioning

confidence: 99%

Derivatization Ion Chromatography for the Determination of Monoethanolamine in Presence of Hydrazine in PHWR Steam-Water Circuits

Ayushi

Sengupta

Kumar

et al. 2011

International Journal of Analytical Chemistry

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A simple, rapid and accurate method for the determination of monoethanolamine (MEA) in PHWR steam-water circuits has been developed. MEA is added in the feed water to provide protection against corrosion while hydrazine is added to scavenge dissolved oxygen. The quantitative determination of MEA in presence of hydrazine was accomplished using derivatization ion chromatography with conductometric detection in nonsuppressed mode. A Metrosep cation 1-2 analytical column and a Metrosep cartridge were used for cation separation. A mixture of 4 mM tartaric acid, 20% acetone and 0.05 mM HNO3 was used as eluent. Acetone in the mobile phase leads to the formation of different derivatives with MEA and hydrazine. The interferences due Na+ and NH4 + were eliminated by adopting a simple pretreatment procedure employing OnGuard-H cartridge. The limit of detection limit of MEA was 0.1 μg mL−1 and the relative standard deviation was 2% for the overall method. The recovery of MEA added was in the range 95%–102%. The method was applied to the determination of MEA in steam generator water samples.

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Use of organic amines in water chemistry control for pressurized water reactor secondary systems

Cited by 8 publications

References 6 publications

Stimulated Decomposition of Fe(OH)₂in the Presence of AVT Chemicals and Metallic Surfaces—Relevance to Low-Temperature Feedwater Line Corrosion

Stimulated Decomposition of Fe(OH)₂in the Presence of AVT Chemicals and Metallic Surfaces—Relevance to Low-Temperature Feedwater Line Corrosion

Study on the Effect of Polyamine Water Treatment Agent on Metal Corrosion Inhibition in Boiler Steam–Water System

Derivatization Ion Chromatography for the Determination of Monoethanolamine in Presence of Hydrazine in PHWR Steam-Water Circuits

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Use of organic amines in water chemistry control for pressurized water reactor secondary systems

Cited by 8 publications

References 6 publications

Stimulated Decomposition of Fe(OH)2in the Presence of AVT Chemicals and Metallic Surfaces—Relevance to Low-Temperature Feedwater Line Corrosion

Stimulated Decomposition of Fe(OH)2in the Presence of AVT Chemicals and Metallic Surfaces—Relevance to Low-Temperature Feedwater Line Corrosion

Study on the Effect of Polyamine Water Treatment Agent on Metal Corrosion Inhibition in Boiler Steam–Water System

Derivatization Ion Chromatography for the Determination of Monoethanolamine in Presence of Hydrazine in PHWR Steam-Water Circuits

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Stimulated Decomposition of Fe(OH)₂in the Presence of AVT Chemicals and Metallic Surfaces—Relevance to Low-Temperature Feedwater Line Corrosion

Stimulated Decomposition of Fe(OH)₂in the Presence of AVT Chemicals and Metallic Surfaces—Relevance to Low-Temperature Feedwater Line Corrosion