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Performances of highly insulated compact zinc roofs under a humid-moderate climate, part II: corrosion behavior

(2011) JOURNAL OF BUILDING PHYSICS. 34(3). p.277-293
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Abstract
In the first paper (Zheng et al., 2010), the hygrothermal performance of highly insulated flat compact zinc roofs was assessed. This article evaluates the zinc sheeting corrosion behavior of the roofs. After an exposure of 28 months, little corrosion occurred at the sheeting upside. However, serious pitting corrosion developed at the sheeting underside. The maximum pit depths measured in the samples (0.5 x 0.7m(2)) collected from each roof were between 124 and 209 mu m. The main corrosion products identified were Zn-5(CO3)(2)(OH)(6) and ZnO. It was found that less condensation deposit at the sheeting underside did not guarantee a reduction in underside corrosion. The wetting/drying cycling at the sheeting underside played a very important role in the corrosion process. The results show that, in addition to the reduction of the sheeting underside TOW (time of wetness), the number of wetting/drying cycles should also be decreased.
Keywords
condensation, metallic roofs, extreme value statistics, durability, corrosion

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Citation

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Chicago
Zheng, R, Arnold Janssens, J Carmeliet, W Bogaerts, and H Hens. 2011. “Performances of Highly Insulated Compact Zinc Roofs Under a Humid-moderate Climate, Part II: Corrosion Behavior.” Journal of Building Physics 34 (3): 277–293.
APA
Zheng, R., Janssens, A., Carmeliet, J., Bogaerts, W., & Hens, H. (2011). Performances of highly insulated compact zinc roofs under a humid-moderate climate, part II: corrosion behavior. JOURNAL OF BUILDING PHYSICS, 34(3), 277–293.
Vancouver
1.
Zheng R, Janssens A, Carmeliet J, Bogaerts W, Hens H. Performances of highly insulated compact zinc roofs under a humid-moderate climate, part II: corrosion behavior. JOURNAL OF BUILDING PHYSICS. 2011;34(3):277–93.
MLA
Zheng, R, Arnold Janssens, J Carmeliet, et al. “Performances of Highly Insulated Compact Zinc Roofs Under a Humid-moderate Climate, Part II: Corrosion Behavior.” JOURNAL OF BUILDING PHYSICS 34.3 (2011): 277–293. Print.
@article{1202115,
  abstract     = {In the first paper (Zheng et al., 2010), the hygrothermal performance of highly insulated flat compact zinc roofs was assessed. This article evaluates the zinc sheeting corrosion behavior of the roofs. After an exposure of 28 months, little corrosion occurred at the sheeting upside. However, serious pitting corrosion developed at the sheeting underside. The maximum pit depths measured in the samples (0.5 x 0.7m(2)) collected from each roof were between 124 and 209 mu m. The main corrosion products identified were Zn-5(CO3)(2)(OH)(6) and ZnO. It was found that less condensation deposit at the sheeting underside did not guarantee a reduction in underside corrosion. The wetting/drying cycling at the sheeting underside played a very important role in the corrosion process. The results show that, in addition to the reduction of the sheeting underside TOW (time of wetness), the number of wetting/drying cycles should also be decreased.},
  author       = {Zheng, R and Janssens, Arnold and Carmeliet, J and Bogaerts, W and Hens, H},
  issn         = {1744-2591},
  journal      = {JOURNAL OF BUILDING PHYSICS},
  keyword      = {condensation,metallic roofs,extreme value statistics,durability,corrosion},
  language     = {eng},
  number       = {3},
  pages        = {277--293},
  title        = {Performances of highly insulated compact zinc roofs under a humid-moderate climate, part II: corrosion behavior},
  url          = {http://dx.doi.org/10.1177/1744259110370853},
  volume       = {34},
  year         = {2011},
}

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