The effect of phosphonates on the corrosion of carbon steel in heat-supply water

Balaban-Irmenin, Yu. V.; Rubashov, A. M.; Fokina, N. G.

doi:10.1134/s0033173206020044

Cited by 16 publications

(12 citation statements)

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“…[13] Layer formation proved to be a spontaneous process on iron, and can be accomplished by simple immersion into an aqueous solution of phosphonate additives, resulting in a thin dense multimolecular adsorption layer with a high corrosion protection effect. It was concluded that the mechanism of inhibition was anodic type, hindering active iron dissolution due to the blocking of the metal surface.…”

Section: Metal Phosphonate Corrosion Inhibitors 93mentioning

confidence: 99%

Structural Mapping of Hybrid Metal Phosphonate Corrosion Inhibiting Thin Films

Papadaki

Demadis

2009

Comments on Inorganic Chemistry

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The constant growth in the area of metal phosphonate materials is exemplified with rich chemistry and a variety of applications. From the multitude of subjects related to metal phosphonates, we have decided to focus on metal phosphonate coordination polymers as corrosion inhibitors in the present Comment. A plethora of metal phosphonate organic-inorganic polymeric hybrid materials have been synthesized, structurally characterized, and evaluated for their anticorrosion properties for the protection of carbon steels. These materials are composed of a metal ion (usually Zn 2þ , Ca 2þ , Sr 2þ , Ba 2þ , etc.) and polyphosphonate ligands such as AMP (amino-tris-(methylenephosphonate) and HDTMP (hexamethylenediaminetetrakis(methylenephosphonate), or carboxyphosphonate ligands, such as PBTC (2-phosphonobutane-1,2,4-tricarboxylate) and HPAA (hydroxyphosphonoacetate). Their corrosion inhibition performance has been evaluated and some interesting conclusions are drawn relating molecular structure to inhibitory activity.

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Section: Metal Phosphonate Corrosion Inhibitors 93mentioning

confidence: 99%

Structural Mapping of Hybrid Metal Phosphonate Corrosion Inhibiting Thin Films

Papadaki

Demadis

2009

Comments on Inorganic Chemistry

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“…Such a slurry is captured by a heat carrier and also participates in scale formation processes, contributing to the formation of denser layers of deposits on the inner surface of the pipe. Elimination of scaling deposits from the internal surface of pipelines in heat supply systems is carried out by various methods, one of which is the selection of an effective washing solution composition 4,5 .…”

Section: Introductionmentioning

confidence: 99%

Conditions for Establishing the Optimal-Efficient Scheme of the Process of Flushing of Heat Supply Systems

Vysotskaya¹,

Kabylbekova²,

Бекжигитова³

et al. 2017

Orient. J. Chem

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The composition of corrosion-scale deposits, consisting of alkali metal carbonates, silicates and sulfates, formed on the metal surface in the form of dense and loose deposits, depending on the composition of the heat carrier (water) formed on the inner surface of pipelines in heat supply systems using a scanning electron microscope brand JSM-6490LV with systems of energy dispersive microanalysis INSA Energu and structural analysis HKL-Basic with a useful increase of 300,000 in combination with a high-performance liquid chromatograph Varian Pro Star was investigated. The solutions of acids: hydrochloric, oxalic, citric and sulphamic acids, often used as washing reagents in heat supply systems, are shown, the rate of corrosion and loss from corrosion under wash conditions were investigated. The process of selecting the optimal module of sodium silicate used as an inhibitor in the washing solution was determined, it is studied and experimentally installed dependence of the corrosion rate index on the inhibitor module and the time of aging of the sample in the inhibitor solution was studied and experimentally established in order to create an effective protective film with a high aftereffect. An instrument-technological scheme for chemical washing of the internal surface of pipelines is given to remove scaling deposits.

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“…In heating systems where chemically purified de-aerated water is circulating [1], mainly, external corrosion occurs due to various causes: stray currents, leaks from other systems and chemical composition of the soil [2][3]. More than 90% of the defects in the HWSS are resulted from internal corrosion [1][2][3]. Internal corrosion is caused by the chemical composition of the heated under-aerated tap water and by air-blasting and, most importantly by the total lack of any protection of the internal pipe surface.…”

Section: Introductionmentioning

confidence: 99%

“…The main difference between hot water supply systems (HWSS) and heating systems is the nature of the black metal corrosion. In heating systems where chemically purified de-aerated water is circulating [1], mainly, external corrosion occurs due to various causes: stray currents, leaks from other systems and chemical composition of the soil [2][3]. More than 90% of the defects in the HWSS are resulted from internal corrosion [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Urban renovation of the hot water supply system

2017

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Abstract:Issues related to improving the reliability of hot water supply systems are considered. Currently, centralized hot water supply systems are in an emergency condition due to the fact that the external networks are made of black pipes without anticorrosive coatings. A fundamental difference between hot water supply systems and heating systems is the nature of black metal corrosion. The purpose of this article is to conduct a research of the state of hot water supply systems and consider options for their recovery. The options suggested for restoration of hot water supply systems in cities and settlements of Ukraine are the following: complete replacement of failed networks with new pre-insulated plastic pipelines; refusal from external networks of centralized hot water supply systems and a central heat point with the installation of individual heat points in each house; decentralization of hot water supply systems by installing electric water heaters. A technical and economic comparison of these options is carried out, and the advantages and disadvantages of each option are considered. The arrangement of a set of individual heat points instead of one central point cannot be considered as the recommended method, because of the need for large additional costs for the reconstruction of heating, water supply and electricity supply systems. The most technically and economically justified method from the considered renovation methods of hot water supply systems is the complete replacement of failed steel pipelines with new nonmetallic pre-insulated structures.

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The effect of phosphonates on the corrosion of carbon steel in heat-supply water

Cited by 16 publications

References 0 publications

Structural Mapping of Hybrid Metal Phosphonate Corrosion Inhibiting Thin Films

Structural Mapping of Hybrid Metal Phosphonate Corrosion Inhibiting Thin Films

Conditions for Establishing the Optimal-Efficient Scheme of the Process of Flushing of Heat Supply Systems

Urban renovation of the hot water supply system

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