1711571

Method to Determine Number and Size of Samples Taken from Zinc Roof to Analyze Pitting Corrosion

Conference Proceeding by ASHRAE, 2001

Rongjin Zheng; Jan E. Carmeliet, Ph.D.; Hugo Hens, Ph.D.; Walter F. Bogaerts, Ph.D.

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Pitting corrosion is one of the most dangerous corrosion types for zinc roofs. The theory of extreme-value statistics is a powerful tool to quantitatively analyze pitting corrosion. For obtaining reliable results, it is very important to know how to collect small samples correctly and effectively. The method proposed by JSCE (1988) is discussed. This method considers only the influence of the number of small samples on the estimated maximum pit depth over a large area and not the influence of the number of pits per small sample. An improved method, which takes both influences into account, is presented in this paper. Two examples are given to demonstrate the application of the improved method in zinc roofs.


Authors: Rongjin Zheng; Jan E. Carmeliet, Ph.D.; Hugo Hens, Ph.D.; Walter F. Bogaerts, Ph.D.

Citation: Thermal Performance of the Exterior Envelopes of Buildings VIII

Keywords: December, Florida, 2001

 

Product Details

Published:
2001
File Size:
1 file , 2.2 MB
Product Code(s):
D-8005
Note:
This product is unavailable in Russia, Belarus