Bibliografie tematiche / Atmospheric corrosivity

Letteratura scientifica selezionata sul tema "Atmospheric corrosivity"

Autore: Grafiati
Pubblicato: 4 giugno 2021
Ultima modifica: 20 febbraio 2023

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Articoli di riviste sul tema "Atmospheric corrosivity"

1

Kreislova, K., e M. Vlachova. "Monitoring of the atmospheric corrosivity by resistive sensors". Koroze a ochrana materialu 65, n. 3 (1 novembre 2021): 86–91. http://dx.doi.org/10.2478/kom-2021-0011.

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Abstract (sommario):
Abstract Atmospheric corrosivity is classified according to EN ISO 9223 Corrosion of metals and alloys – Corrosivity of atmospheres – Classification, determination and estimation. For the determination and estimation of the corrosivity category, standardized approaches are used. Monitoring of corrosivity with the application of various sensors is an actual trend. The paper gives results of verification of some types of sensors for this monitoring with standardized flat samples at atmospheric test sites in the Czech Republic. The trend of decreasing atmospheric corrosivity is evident in the last decade. Monitoring of the corrosion rate and mapping of the corrosivity become a very important step in preventing failures in long-term atmospheric exposition. This type of monitoring was used on bridge construction to estimate the seasonal effect of de-icing salts deposition, too.
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2

Surnam, B. Y. R., e C. V. Oleti. "Determining the Corrosivity of Atmospheres, through the Weight Loss Method, According to ISO 9223". Advanced Materials Research 433-440 (gennaio 2012): 975–82. http://dx.doi.org/10.4028/www.scientific.net/amr.433-440.975.

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Abstract (sommario):
ISO 9223 can be used to categorize the corrosivity of atmospheres through either corrosion loss measurements or the use of environmental data. Although both methods are expected to give the same result, discrepancies have been found to occur. The present paper analyses this aspect of ISO 9223, focusing on the effects of metal composition, when using carbon steel, in corrosivity categorisation. Low and medium carbon steel were, therefore, exposed outdoors at one site in Mauritius to determine its atmospheric corrosivity. It was found that for medium carbon steel, the corrosivity obtained from corrosion loss results, through the weight loss method, was not in conformance with that obtained through the environmental data. This was not the case with low carbon steel. Taking into consideration the various factors affecting atmospheric corrosion, it was concluded that the carbon content of carbon steel is an important parameter that should be considered in ISO 9223 for more reliable determination of the corrosivity of atmospheres.
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3

Klassen,, R. D., e P. R. Roberge,. "PATTERNS OF ATMOSPHERIC CORROSIVITY". Corrosion Reviews 20, n. 1-2 (febbraio 2002): 1–28. http://dx.doi.org/10.1515/corrrev.2002.20.1-2.1.

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4

Wesolowski, Mariusz, Aleksandra Rumak, Pawel Iwanowski e Adam Poswiata. "Assessment of the Impact of Atmospheric Corrosivity on the Cement Concrete Airfield Pavement’s Operation Process". Sustainability 12, n. 22 (17 novembre 2020): 9560. http://dx.doi.org/10.3390/su12229560.

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Abstract (sommario):
The aim of this research is to assess corrosion in natural atmospheric conditions, based on exposure of material samples and periodic monitoring, and to determine the size of corrosion losses, their form and appearance, as well as changes in physical properties at regular time intervals. Atmospheric corrosion tests were ultimately carried out in order to determine the corrosion resistance of a cement concrete airfield pavement, as well as to assess the type of corrosion and research data in order to determine and estimate the corrosivity of the atmosphere. Atmospheric corrosivity is one of the parameters characterizing the technical condition of airfield pavement functional elements; it makes it possible to estimate a suitable frequency of airfield periodic inspections. Assessments of concrete corrosion and atmospheric corrosivity enable appropriate countermeasures to be taken in order to maintain the airport functional elements in a constant state of technical readiness. In the following study, the prepared samples were exposed to atmospheric conditions in designated places located at selected military airport facilities. Corrosion samples in the form of 50 mm × 100 mm standard samples, 1 mm to 3 mm in thickness, were placed on special frames located within fenced corrosion stations. The corrosion rate rcorr of a specific metal, expressed as a corrosion loss, depends on the environmental conditions. This article presents an atmosphere corrosivity category assessment for low-carbon steel, zinc, copper and aluminum reference samples, taking into account weight or thickness loss after one year of exposure.
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5

TAHARA, Akira. "Atmospheric Corrosivity using Steel Specimens". Journal of the Japan Society of Colour Material 84, n. 6 (2011): 205–11. http://dx.doi.org/10.4011/shikizai.84.205.

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6

Roberge, P. R., R. D. Klassen e P. W. Haberecht. "Atmospheric corrosivity modeling — a review". Materials & Design 23, n. 3 (maggio 2002): 321–30. http://dx.doi.org/10.1016/s0261-3069(01)00051-6.

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7

Corvo, F., C. Haces, N. Betancourt, L. Maldonado, L. Véleva, M. Echeverria, O. T. De Rincón e A. Rincon. "Atmospheric corrosivity in the Caribbean area". Corrosion Science 39, n. 5 (maggio 1997): 823–33. http://dx.doi.org/10.1016/s0010-938x(96)00138-2.

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8

Kobus, Joanna, e Rafał Lutze. "Predicting of atmospheric corrosivity and durability of structural materials. Part I. Industrial, urban and rural area". Inżynieria Powierzchni 26, n. 1 (8 giugno 2021): 34–45. http://dx.doi.org/10.5604/01.3001.0014.8776.

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Abstract (sommario):
The possibilities of monitoring atmospheric corrosivity in Poland in the years 1991–2019 to formulate empirical dependencies of corrosion losses of metals on selected environmental parameters and to build a program for spatial distribution of environmental data and corrosion damage have been presented. Algorithms make it possible to predict atmospheric corrosivity categories for selected industrial, urban and extra-urban areas.
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9

Cao, Xian Long, Yi De Xiao, Hong Da Deng, Peng Jun Cao e Bi Jia. "Evaluation of Atmospheric Corrosivity by ACM Technique". Materials Science Forum 610-613 (gennaio 2009): 3–8. http://dx.doi.org/10.4028/www.scientific.net/msf.610-613.3.

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Abstract (sommario):
The atmospheric corrosion has been shown to be an electrochemical process, the atmospheric corrosion behavior of Q235 stell evaluated with ACM (Atmospheric corrosion monitor) electrochemical technique was investigated in the study. The experimental results showed that there existed a close relation between electrochemical data and climatic parameters was confirmed. Taking into consideration accuracy and sensitivity of electrochemical technique, the ISO-standardized time of wetness (TOW) seems to be too conservative. SO2 seems to be more aggressive than chloride on metal corrosion in the early stage of atmospheric corrosion but the complexion reverses in the final stage of atmospheric corrosion. The ratio of corrosion rate from integration of ACM current to corrosion rate from weight loss of test specimens, that is, cell factor is fairly constant at the same test site but varied greatly between test sites. Based on constant cell factors and close relation between electrochemical data and climatic parameters in all test sites, ACM electrochemical technique can evaluate and classify the short-term atmospheric corrosivity as a substitute for gravimetric method, and the verification shows that atmospheric corrosivity classifications according to integration of ACM current and especially to cell factor coincide with the specifications of ISO Standard.
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10

Santana, Juan J., Alejandro Ramos, Alejandro Rodriguez-Gonzalez, Helena C. Vasconcelos, Vicente Mena, Bibiana M. Fernández-Pérez e Ricardo M. Souto. "Shortcomings of International Standard ISO 9223 for the Classification, Determination, and Estimation of Atmosphere Corrosivities in Subtropical Archipelagic Conditions—The Case of the Canary Islands (Spain)". Metals 9, n. 10 (15 ottobre 2019): 1105. http://dx.doi.org/10.3390/met9101105.

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Abstract (sommario):
The classification, assessment, and estimation of the atmospheric corrosivity are fixed by the ISO 9223 standard. Its recent second edition introduced a new corrosivity category for extreme environments CX, and defined mathematical models that contain dose–response functions for normative corrosivity estimations. It is shown here that application of the ISO 9223 standard to archipelagic subtropical areas exhibits major shortcomings. Firstly, the corrosion rates of zinc and copper exceed the range employed to define the CX category. Secondly, normative corrosivity estimation would require the mathematical models to be redefined introducing the time of wetness and a new set of operation constants.
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Più fonti

Tesi sul tema "Atmospheric corrosivity"

1

McGeachie, M. T., University of Western Sydney, College of Law and Business e of Construction Property and Planning School. "Characterisation of the Sydney region in relation to corrosion, timber decay risk factors and the corrosion of nails in timber in covered conditions". THESIS_CLAB_CPP_McGeachie_M.xml, 2001. http://handle.uws.edu.au:8081/1959.7/491.

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Abstract (sommario):
The aim of the study was to characterise the environment in the Sydney region in respect of atmospheric corrosivity, timber decay risk factors and the corrosion of nails in timber in covered conditions. The study reviewed contemporary research in this field, particularly in Australia, developing an understanding of the durability failure mechanisms for timber and nails in timber. The study looked at the effects of climatic aspects, pollutants, corrosion on timber decay risk factors. The study found that the levels of risk in terms of timber degradation, corrosion and nail corrosion were greatest adjacent to the coast and at marine sites.
Doctor of Philosophy (PhD)
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2

Haberecht, Peter. "Pollution deposition rates on insulator (HV) surfaces for use in atmospheric corrosivity estimation". Thesis, 2008. http://hdl.handle.net/1959.13/38069.

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Abstract (sommario):
Research Doctorate - Doctor of Philosophy (PhD)
This work reports the deposition onto high voltage insulators and correlation to atmospheric corrosivity measurement. This work includes corrosion studies at 15 sites in New Zealand (1,816 tests) for in excess of 12 months, and co-operative research in South Africa. In addition, to confirm the relevance and transportability of this proposed model, a review of the published international data on deposition rates on insulators was conducted. It was noted that the deposition rate of airborne pollutants onto a surface is dependent upon the true surface area facing the wind and the aerodynamic properties of the surface. Such is the effect that surfaces with minimal exposure to the wind such as horizontal plates, have been shown to be poor collectors of deposits while vertical plates are more efficient, followed by high voltage glass insulators, the ISO9223 salt candle, and the largest collector is the Direct Dust Deposit Gauge. This study found that the ISO9223 wet salt candle and the average annual deposition rate on the High Voltage Glass insulator bottom surface (unenergized) provided relatively similar deposition results. The deposition onto insulator surfaces may be a more relevant method as it replicates deposition on large surfaces. This Equivalent Salt Dry Deposition (ESDD) method for HV insulators is an all inclusive measure of the airborne pollutants deposition rate and converts the total deposited material into a single value equivalent to that of salt, even though the deposit may consist of sulphur, marine salts, nitrates, and other conductive pollutants. The measured deposition rate on the sheltered insulator bottoms at 85 sites around the world predicted 87% of the ISO corrosivity categories (based on zinc corrosion) for these sites. Results from equatorial Asia appear to be non-compliant and warrant further investigation. The ESDD values are now being quoted from around the world, by electrical engineers who use the recently revised CIGRE methodology, to determine the probability of arc-over (shorting to earth) of high voltage cables due to pollution build-up on insulators. The implications from this research are significant, with the cost of atmospheric corrosivity studies becoming prohibitively expensive, this method converts technically valid surface deposition results from the electrical engineers from around the world (provided at no cost), to valid empirical corrosivity rates from often remote locations.
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3

Haberecht, Peter. "Pollution deposition rates on insulator (HV) surfaces for use in atmospheric corrosivity estimation". 2008. http://hdl.handle.net/1959.13/38069.

Testo completo
Abstract (sommario):
Research Doctorate - Doctor of Philosophy (PhD)
This work reports the deposition onto high voltage insulators and correlation to atmospheric corrosivity measurement. This work includes corrosion studies at 15 sites in New Zealand (1,816 tests) for in excess of 12 months, and co-operative research in South Africa. In addition, to confirm the relevance and transportability of this proposed model, a review of the published international data on deposition rates on insulators was conducted. It was noted that the deposition rate of airborne pollutants onto a surface is dependent upon the true surface area facing the wind and the aerodynamic properties of the surface. Such is the effect that surfaces with minimal exposure to the wind such as horizontal plates, have been shown to be poor collectors of deposits while vertical plates are more efficient, followed by high voltage glass insulators, the ISO9223 salt candle, and the largest collector is the Direct Dust Deposit Gauge. This study found that the ISO9223 wet salt candle and the average annual deposition rate on the High Voltage Glass insulator bottom surface (unenergized) provided relatively similar deposition results. The deposition onto insulator surfaces may be a more relevant method as it replicates deposition on large surfaces. This Equivalent Salt Dry Deposition (ESDD) method for HV insulators is an all inclusive measure of the airborne pollutants deposition rate and converts the total deposited material into a single value equivalent to that of salt, even though the deposit may consist of sulphur, marine salts, nitrates, and other conductive pollutants. The measured deposition rate on the sheltered insulator bottoms at 85 sites around the world predicted 87% of the ISO corrosivity categories (based on zinc corrosion) for these sites. Results from equatorial Asia appear to be non-compliant and warrant further investigation. The ESDD values are now being quoted from around the world, by electrical engineers who use the recently revised CIGRE methodology, to determine the probability of arc-over (shorting to earth) of high voltage cables due to pollution build-up on insulators. The implications from this research are significant, with the cost of atmospheric corrosivity studies becoming prohibitively expensive, this method converts technically valid surface deposition results from the electrical engineers from around the world (provided at no cost), to valid empirical corrosivity rates from often remote locations.
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4

McGeachie, M. T. "Characterisation of the Sydney region in relation to corrosion, timber decay risk factors and the corrosion of nails in timber in covered conditions". Thesis, 2001. http://handle.uws.edu.au:8081/1959.7/491.

Testo completo
Abstract (sommario):
The aim of the study was to characterise the environment in the Sydney region in respect of atmospheric corrosivity, timber decay risk factors and the corrosion of nails in timber in covered conditions. The study reviewed contemporary research in this field, particularly in Australia, developing an understanding of the durability failure mechanisms for timber and nails in timber. The study looked at the effects of climatic aspects, pollutants, corrosion on timber decay risk factors. The study found that the levels of risk in terms of timber degradation, corrosion and nail corrosion were greatest adjacent to the coast and at marine sites.
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Capitoli di libri sul tema "Atmospheric corrosivity"

1

Shinohara, Tadashi, Shin-ichi Motoda e Wataru Oshikawa. "Evaluation of Corrosivity in Atmospheric Environment by ACM (Atmospheric Corrosion Monitor) Type Corrosion Sensor". In Materials Science Forum, 61–64. Stafa: Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-960-1.61.

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2

Knotkova, D., e K. Kreislova. "Corrosivity of atmospheres – derivation and use of information". In Environmental Deterioration of Materials, 73–105. WIT Press, 2007. http://dx.doi.org/10.2495/978-1-84564-032-3/03.

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Atti di convegni sul tema "Atmospheric corrosivity"

1

KREISLOVA, Katerina. "The Actual Approach for Atmospheric Corrosivity Clasiffication in Respect to Protective Coating Choice". In METAL 2022. TANGER Ltd., 2022. http://dx.doi.org/10.37904/metal.2022.4416.

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2

Rioual, Stephane, Benoit Lescop, Julien Pellé, Gilles Chaumat, Gerusa De Alkmim Radicchi, Marie-Dominique Bruni, Johan Becker e Dominique Thierry. "Evaluation of atmospheric corrosivity index in museums by RFID sensors: application to the monitoring of pollution emitted by archeological woods". In 1st Corrosion and Materials Degradation Web Conference. Basel, Switzerland: MDPI, 2021. http://dx.doi.org/10.3390/cmdwc2021-09954.

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3

Bokkers, Albert, Piter Brandenburg, Coert Van Lare, Cees Kooijman e Arjan Schutte. "A Matrix Acidizing System for Controlled Carbonate Well Stimulation using a Carboxylic Acid Salt with a Chelating Agent". In SPE/IADC Middle East Drilling Technology Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/202083-ms.

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Abstract (sommario):
Abstract This work presents a matrix acidizing formulation which comprises a salt of monochloroacetic acid giving a delayed acidification and a chelating agent to prevent precipitation of a calcium salt. Results of dissolution capacity, core flood test and corrosion inhibition are presented and are compared to performance of 15 wt% emulsified HCl. Dissolution capacity tests were performed in a stirred reactor at atmospheric pressure using equimolar amounts of the crushed limestone and dolomites. Four different chelating agents were added to test the calcium ion sequestering power. Corrosion tests were executed using an autoclave reactor under nitrogen atmosphere at 10 barg. Core flood tests were performed to simulate carbonate matrix stimulation using limestone cores. It was found that the half-life time of the hydrolysis reaction is 77 min at a temperature of 100 °C. Sodium gluconate and the sodium salt of D-glucoheptonic acid were identified to successfully prevent the precipitation of the reaction product calcium glycolate at a temperature of 40 °C. Computed Tomography (CT) scans of the treated cores at optimum injection rate showed a single wormhole formed. At 150 °C an optimum injection rate of 1 ml/min was found which corresponds to a minimum PVBT of 6. In addition, no face dissolution was observed after coreflooding. Furthermore, the corrosion rates of different metallurgies (L80 and J55) were measured which are significantly less than data reported in literature for 15wt% emulsified HCl. The novelty of this formulation is that it slowly releases an organic acid in the well allowing deeper penetration in the formation and sodium gluconate prevents precipitation of the reaction product. The corrosivity of this formulation is relatively low saving maintenance costs to installations and pipe work. The active ingredient in the formulation is a solid, allowing onsite preparation of the acidizing fluid.
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4

ŠVADLENA, Jan, Kristýna Charlotte STRACHOTOVÁ, Tomáš PROŠEK e Milan KOUŘIL. "Evaluation of corrosivity of indoor museum atmospheres using lead specimens". In METAL 2020. TANGER Ltd., 2020. http://dx.doi.org/10.37904/metal.2020.3631.

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