Study into the influence of concentration of ions of chlorine and temperature of circulating water on the corrosion stability of carbon steel and cast iron

Pancheva, Hanna; Reznichenko, Anna; Miroshnichenko, N. V.; Sincheskul, Alexander; Pilipenko, Alexei; Loboichenko, Valentyna

doi:10.15587/1729-4061.2017.108908

Cited by 11 publications

(4 citation statements)

References 12 publications

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“…The electrical resistance of the oxide obtained by the electrochemical method is much less than the resistance value mentioned in the literature [13,[17][18][19]. The deviation may be caused by the presence of inclusions in the bulk alloy, as well as electronic defects in the film [20,21]. But the main reason is that the film contains some solution components.…”

Section: Resultsmentioning

confidence: 90%

Electrochemical Oxidation of VT6 Titanium Alloy in Oxalic Acid Solutions

Pilipenko¹,

Maizelis²,

Pancheva³

et al. 2020

Ch&Cht

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The influence of the electrolysis parameters on the process of VT6 titanium alloy oxidizing in oxalic acid solutions is presented. It is shown that the nature of cell voltage-time curves for the alloy samples depends on the current density used. The interference-colored oxide films are formed on the surface of the alloy at the anodic current density above 0.5 A•dm -2 . The maximal thickness and the oxide film color are determined by the cell voltage and do not depend on other electrolysis parameters. The results of oxidation in oxalic and sulfuric acids solutions made it possible to establish the similarity of cell voltage-time dependencies and the time of oxide film formation with maximal thickness for these electrolysis conditions.

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Section: Resultsmentioning

confidence: 90%

Electrochemical Oxidation of VT6 Titanium Alloy in Oxalic Acid Solutions

Pilipenko¹,

Maizelis²,

Pancheva³

et al. 2020

Ch&Cht

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“…We reported a high chlorine content in the water extracts of all three types of rocks: burnt siltstone (81.4 mg/l), slightly burnt sandstone (97.7 mg/l) and unburned argillite (111.2 mg/l). It should be noted that chlorine ions can form very toxic chlorophenols with phenols, as well as aff ect the corrosiveness of solutions [38]. An important indicator of water and soil quality is the content of nitrogen compounds, in particular nitrates and nitrites, and ammonium, which indicates the feasibility of studying their content in rocks.…”

Section: Resultsmentioning

confidence: 99%

Water Extracts from Waste Rocks of the Coal Industry of Chernvonograd Mining Area (Ukraine): Problems of Environmental Safety and Civil Protection

Kochmar¹,

Karabyn²

2023

Ecol. Eng. Environ. Technol.

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The article presents the results of the research on mining production waste in the Chervonohrad Mining Area. For the first time the water extracts from certain types of waste rock, namely: burned and unburned argillite, siltstone, siliceous siltstone, coal, and sandstone were investigated. The studies covered the main chemical composition, as well as the pH and concentration of the main components of the aqueous extracts. Based on the obtained results, the properties of the investigated mining wastes were characterized, taking into account the impact on the environment. According to the obtained results, it can be stated that there is high content of Mg 2+ , SO 4 2-, HCO 3 in argillite and sandstone within the tericon of the central coal enrichment plant "Chervonohradska" and burnt argillite from the tericon of the Vizeyska mine.

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“…The probable reason for the rather high iron content in the tap water (Table 2) is worn out steel pipes and their corrosion [52] in the city's water supply system. The content of lead, copper and nickel in the studied sources was below the national standard values, the European standards, and WHO standards [29,31,32], or these metals were not detected.…”

Section: Resultsmentioning

confidence: 99%

Investigation of the Content of Heavy Metals in Water Sources of Kharkiv City, Ukraine

Loboichenko

Закоморна

Ilinskyi

et al. 2021

Curr. Appl. Sci. Technol.

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The negative impact of the anthropogenic factor on water bodies, including those ones located within urban ecosystems is analyzed in this paper. The legislative support of the specific requirements for water quality in different countries is considered. The purpose of the work is to investigate the qualitative and quantitative state of water from individual sources located in an urban ecosystem and determine its suitability for the consumption. The Shatylovskу spring, the Karpovsky spring, the spring near the Nemyshlya river, located within the Kharkіv city (Ukraine), were researched. Heavy metal identification was carried out using X-ray fluorescence analysis. It was found that all samples contained basically the same set of basic elements - strontium, copper, iron and chromium. Individual differences were associated with the presence of different amounts of tungsten, zinc, gallium, selenium, bromine, etc. in all samples. It was found that in the samples, the lead content reached 0.015 mg/dm3 (Karpovsky spring), nickel 0.007 mg/dm3 (Shatylovskу spring), and manganese 0.205 mg/dm3 (the spring near the Nemyshlya river). The copper content ranged from 0.029 to 0.154 mg/dm3, iron from 0.041 to 0.456 mg/dm3, and chromium from 0.015 to 0.065 mg/dm3. The obtained results make it possible to more efficiently manage water resources within the urban systems studied and indicate the need for additional water purification of all natural sources studied before using the water from those sources for drinking purposes.

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Study into the influence of concentration of ions of chlorine and temperature of circulating water on the corrosion stability of carbon steel and cast iron

Cited by 11 publications

References 12 publications

Electrochemical Oxidation of VT6 Titanium Alloy in Oxalic Acid Solutions

Electrochemical Oxidation of VT6 Titanium Alloy in Oxalic Acid Solutions

Water Extracts from Waste Rocks of the Coal Industry of Chernvonograd Mining Area (Ukraine): Problems of Environmental Safety and Civil Protection

Investigation of the Content of Heavy Metals in Water Sources of Kharkiv City, Ukraine

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