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Article

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)

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Department of Process Engineering, University of Las Palmas de Gran Canaria, 35017 Las Palmas de Gran Canaria, Spain
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Instituto de Estudios Ambientales y Recursos Naturales (i-UNAT), Universidad de Las Palmas de Gran Canaria (ULPGC), 35017 Las Palmas de Gran Canaria, Spain
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Faculty of Sciences and Technology, Azores University, 9500-321 Ponta Delgada, Portugal
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Faculty of Sciences and Technology, Centre of Physics and Technological Research (CEFITEC), Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
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Biotechnology Centre of Azores (CBA), Azores University, 9500-321 Ponta Delgada, Portugal
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Department of Chemistry, University of La Laguna, 38200 La Laguna, Spain
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Institute of Materials Science and Nanotechnology, University of La Laguna, 38200 La Laguna, Spain
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Authors to whom correspondence should be addressed.
Metals 2019, 9(10), 1105; https://doi.org/10.3390/met9101105
Received: 23 September 2019 / Revised: 10 October 2019 / Accepted: 11 October 2019 / Published: 15 October 2019
(This article belongs to the Special Issue Corrosion and Protection of Metals)
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. View Full-Text
Keywords: atmospheric corrosion; ISO 9223; corrosivity categories; predictive models; archipelagic regions; Canary Islands atmospheric corrosion; ISO 9223; corrosivity categories; predictive models; archipelagic regions; Canary Islands
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MDPI and ACS Style

Santana, J.J.; Ramos, A.; Rodriguez-Gonzalez, A.; Vasconcelos, H.C.; Mena, V.; Fernández-Pérez, B.M.; Souto, R.M. 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 2019, 9, 1105. https://doi.org/10.3390/met9101105

AMA Style

Santana JJ, Ramos A, Rodriguez-Gonzalez A, Vasconcelos HC, Mena V, Fernández-Pérez BM, Souto RM. 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. 2019; 9(10):1105. https://doi.org/10.3390/met9101105

Chicago/Turabian Style

Santana, Juan J., Alejandro Ramos, Alejandro Rodriguez-Gonzalez, Helena C. Vasconcelos, Vicente Mena, Bibiana M. Fernández-Pérez, and Ricardo M. Souto 2019. "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, no. 10: 1105. https://doi.org/10.3390/met9101105

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