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Title: 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)
Authors: Santana, Juan J. 
Ramos, Alejandro 
Rodriguez-Gonzalez, Alejandro 
Vasconcelos, Helena C.
Mena, Vicente
Fernández-Pérez, Bibiana M.
Souto, Ricardo M.
UNESCO Clasification: 330307 Tecnología de la corrosión
Keywords: Atmospheric corrosion
ISO 9223
Corrosivity categories
Predictive models
Archipelagic regions, et al
Issue Date: 2019
Project: Investigación y Aplicación Industrial de Nuevos Recubrimientos Poliméricos Con 
Journal: Metals 
Abstract: 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.
ISSN: 2075-4701
DOI: 10.3390/met9101105
Source: Metals [ISSN 2075-4701],v. 9 (10), 1105
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