NaCl and Na2SO4 solution effect on weathering steel visual appearance when the ambient temperature changes cyclically

Visual appearance—colour and texture variation—of weathering steel was compared by testing weathering steel samples in aggressive and non-aggressive conditions, and cyclical changes of ambient temperature. This paper introduces a new method for determining visual appearance of weather-resistant stee...

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Autores principales:	Mindaugas Daukšys, Evelina Bitautaitė, Jūratė Mockienė, Dalia Nizevičienė
Formato:	article
Lenguaje:	EN
Publicado:	Taylor & Francis Group 2019
Materias:	weathering steel nacl and na2so4 solution visual appearance xrd analysis eds analysis Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/bced34613d6942bb89bf92d78e804e8a
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id	oai:doaj.org-article:bced34613d6942bb89bf92d78e804e8a
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spelling	oai:doaj.org-article:bced34613d6942bb89bf92d78e804e8a2021-11-04T15:51:56ZNaCl and Na2SO4 solution effect on weathering steel visual appearance when the ambient temperature changes cyclically2331-191610.1080/23311916.2019.1659124https://doaj.org/article/bced34613d6942bb89bf92d78e804e8a2019-01-01T00:00:00Zhttp://dx.doi.org/10.1080/23311916.2019.1659124https://doaj.org/toc/2331-1916Visual appearance—colour and texture variation—of weathering steel was compared by testing weathering steel samples in aggressive and non-aggressive conditions, and cyclical changes of ambient temperature. This paper introduces a new method for determining visual appearance of weather-resistant steel in different environmental conditions. Weathering steel samples were tested in H2O, 3% NaCl and 3% Na2SO4 solutions under ambient temperature changing from +20°C to −20°C per day. The structure of steel surface viewed under optical microscope revealed corrosion products in all steel samples. X-ray diffraction analysis of corrosion products revealed the presence of oxy-hydroxides, such as lepidocrocite (ɣ-FeO(OH)), goethite (α-FeO(OH)) and magnetite (Fe3O4) in different environment. Optical microscopy images of corroded surfaces had different visual appearance and orange, yellow, sandy, black or anthracite colours, which indicate that the corrosion products primarily contain lepidocrocite (ɣ-FeO(OH)), goethite (α-FeO(OH)) and magnetite (Fe3O4). EDS analysis revealed that the rust of samples kept in 3% NaCl solution had the highest amount of iron ions.Mindaugas DaukšysEvelina BitautaitėJūratė MockienėDalia NizevičienėTaylor & Francis Grouparticleweathering steelnacl and na2so4 solutionvisual appearancexrd analysiseds analysisEngineering (General). Civil engineering (General)TA1-2040ENCogent Engineering, Vol 6, Iss 1 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	weathering steel nacl and na2so4 solution visual appearance xrd analysis eds analysis Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	weathering steel nacl and na2so4 solution visual appearance xrd analysis eds analysis Engineering (General). Civil engineering (General) TA1-2040 Mindaugas Daukšys Evelina Bitautaitė Jūratė Mockienė Dalia Nizevičienė NaCl and Na2SO4 solution effect on weathering steel visual appearance when the ambient temperature changes cyclically
description	Visual appearance—colour and texture variation—of weathering steel was compared by testing weathering steel samples in aggressive and non-aggressive conditions, and cyclical changes of ambient temperature. This paper introduces a new method for determining visual appearance of weather-resistant steel in different environmental conditions. Weathering steel samples were tested in H2O, 3% NaCl and 3% Na2SO4 solutions under ambient temperature changing from +20°C to −20°C per day. The structure of steel surface viewed under optical microscope revealed corrosion products in all steel samples. X-ray diffraction analysis of corrosion products revealed the presence of oxy-hydroxides, such as lepidocrocite (ɣ-FeO(OH)), goethite (α-FeO(OH)) and magnetite (Fe3O4) in different environment. Optical microscopy images of corroded surfaces had different visual appearance and orange, yellow, sandy, black or anthracite colours, which indicate that the corrosion products primarily contain lepidocrocite (ɣ-FeO(OH)), goethite (α-FeO(OH)) and magnetite (Fe3O4). EDS analysis revealed that the rust of samples kept in 3% NaCl solution had the highest amount of iron ions.
format	article
author	Mindaugas Daukšys Evelina Bitautaitė Jūratė Mockienė Dalia Nizevičienė
author_facet	Mindaugas Daukšys Evelina Bitautaitė Jūratė Mockienė Dalia Nizevičienė
author_sort	Mindaugas Daukšys
title	NaCl and Na2SO4 solution effect on weathering steel visual appearance when the ambient temperature changes cyclically
title_short	NaCl and Na2SO4 solution effect on weathering steel visual appearance when the ambient temperature changes cyclically
title_full	NaCl and Na2SO4 solution effect on weathering steel visual appearance when the ambient temperature changes cyclically
title_fullStr	NaCl and Na2SO4 solution effect on weathering steel visual appearance when the ambient temperature changes cyclically
title_full_unstemmed	NaCl and Na2SO4 solution effect on weathering steel visual appearance when the ambient temperature changes cyclically
title_sort	nacl and na2so4 solution effect on weathering steel visual appearance when the ambient temperature changes cyclically
publisher	Taylor & Francis Group
publishDate	2019
url	https://doaj.org/article/bced34613d6942bb89bf92d78e804e8a
work_keys_str_mv	AT mindaugasdauksys naclandna2so4solutioneffectonweatheringsteelvisualappearancewhentheambienttemperaturechangescyclically AT evelinabitautaite naclandna2so4solutioneffectonweatheringsteelvisualappearancewhentheambienttemperaturechangescyclically AT juratemockiene naclandna2so4solutioneffectonweatheringsteelvisualappearancewhentheambienttemperaturechangescyclically AT dalianizeviciene naclandna2so4solutioneffectonweatheringsteelvisualappearancewhentheambienttemperaturechangescyclically
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NaCl and Na2SO4 solution effect on weathering steel visual appearance when the ambient temperature changes cyclically

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