1. The golden alloy Cu5Zn5Al1Sn: Patina evolution in chloride-containing atmospheres.
- Author
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Chang, Tingru, Herting, Gunilla, Jin, Ying, Leygraf, Christofer, and Odnevall Wallinder, Inger
- Subjects
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ALLOYS , *METALLIC composites , *CORROSION & anti-corrosives , *DETERIORATION of materials , *MICROSTRUCTURE - Abstract
The influence of chloride deposition on the formation, evolution and barrier properties of the patina formed on Cu5Zn5Al1Sn used for architectural cladding is explored via long-term marine field exposures and laboratory investigations. The presence of Cu 2 O, ZnO, Al 2 O 3 and SnO 2 within the inner part of the patina and intercalation of SnO 2 , Zn 5 (CO 3 ) 2 (OH) 6 , Zn 6 Al 2 (OH) 16 CO 3 ·4H 2 O, Zn 5 (OH) 8 Cl 2 ·H 2 O within its outer part, predominantly composed of Cu 2 (OH) 3 Cl, significantly reduce the chloride-induced corrosion compared with Cu metal. The intercalation of zinc-rich corrosion products within the patina and not at the top-surface explain their marginal influence on the runoff process that mainly occurs at the outmost surface. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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