Abstract
Stainless steels have been widely used as architectural and construction materials because of their high degree of corrosion resistance, unique aesthetic quality, and stability in an unpolluted atmosphere. Although stainless steel is highly corrosion resistant, localized corrosion can occur in certain environments, especially in marine atmospheric conditions if the appropriate grade is not used. Exposure of stainless steel to an environment more aggressive than the limiting conditions may be harmful to its aesthetic appearance and ultimately even to its load-bearing capacity.
Selecting a suitable stainless steel grade requires knowledge of the actual location of the application and the atmospheric conditions. In terms of materials selection, the austenitic stainless steel grade 316/316L has proved a very popular choice for architectural applications in many locations, but it is not always suitable at demanding sites such as marine environments in the Middle-East. In such cases the use of a higher-performance grade, often in combination with a good surface finish and established cleaning routines, is required to maintain pristine surfaces.
The main objective of this paper is to present information about the atmospheric corrosion resistance of a number of stainless steels in the Middle-East at a marine site. The results obtained are analysed and discussed in terms of factors affecting atmospheric corrosion of stainless steel such as the, alloying element level, surface roughness, surface treatment, and microclimate.
Zusammenfassung
Nichtrostende Stähle werden in großem Umfang aufgrund ihrer hohen Korrosionsbeständigkeit, einzigartigen ästhetischen Qualität und Stabilität in nicht verunreinigten Atmosphären als Baustoffe verwendet. Obwohl Edelstahl sehr korrosionsbeständig ist, kann eine lokalisierte Korrosion in bestimmten Umgebungen auftreten, insbesondere unter maritimen Bedingungen, wenn nicht eine entsprechende Legierungslage verwendet wird. Wenn Edelstahl einer Umgebung ausgesetzt wird, die aggressiver als die Grenzbedingungen ist, kann seine Ästhetik und letztlich sogar seine Tragfähigkeit beeinträchtigt werden.
Die Auswahl einer geeigneten Edelstahlsorte erfordert die Kenntnis der tatsächlichen Lage der Verwendung und der Umgebungsbedingungen. In Bezug auf die Auswahl der Materialien hat sich die austenitische rostfreie Stahlgüte 316/316L als eine sehr beliebte Wahl für Anwendungen in der Architektur an verschiedenen Orten erwiesen. Er ist aber nicht immer für anspruchsvolle Umgebungen, wie maritimen Umgebungen im Mittleren Osten, geeignet. In solchen Fällen ist die Verwendung eines höheren Legierungsgrads oft in Kombination mit einer guten Oberflächenbeschaffenheit und etablierten Reinigungsprogrammen erforderlich, um unberührte Oberflächen aufrecht zu erhalten.
Das Hauptziel dieser Arbeit ist es, Informationen über die atmosphärische Korrosionsbeständigkeit aus einer Anzahl von nichtrostenden Stählen im Mittleren Osten in einer maritimen Umgebung zu präsentieren. Die Ergebnisse werden im Hinblick auf die Faktoren, die die atmosphärische Korrosion von rostfreiem Stahl beeinflussen, wie z. B. Legierungselement, Oberflächenrauhigkeit, Oberflächenbehandlung und Mikroklima, analysiert.
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Acknowledgments
The authors would like to acknowledge the support given by the Corrosion department at Avesta Research Centre, Outokumpu Stainless AB, and thank the Dubai Electricity and Water Authority (DEWA) for providing the test site in Dubai.
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Mameng, S., Pettersson, R., Leygraf, C. et al. Atmospheric Corrosion Resistance of Stainless Steel: Results of a Field Exposure Program in the Middle-East. Berg Huettenmaenn Monatsh 161, 33–43 (2016). https://doi.org/10.1007/s00501-016-0447-9
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DOI: https://doi.org/10.1007/s00501-016-0447-9