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http://dx.doi.org/10.3795/KSME-A.2008.32.1.013

Effect of Acid Fog on Rust Formation and Fatigue Behavior of Weathering Steel Used in Un-Coated Bridge  

Kim, Min-Gun (강원대학교 기계.메트로닉스공학부)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.32, no.1, 2008 , pp. 13-20 More about this Journal
Abstract
The purpose of this study is to investigate the effect of acid fog on the rust formation behavior of weathering steel (SMA50) which is used in un-coated bridges. Weathering steel didn't form the passive film under the environment of acid fog(pH5,6), whereas the environment of distilled water formed the protective oxide film. Therefore, the construction of weathering steel under the environment extremely exposed to SOx and NOx which are the main compositions of acid fog is not adequate. Fatigue limits of weathering steel under acid fog environment are remarkably decreased as compared with environment of distilled water. The corrosive constituents in acid fog has piled up the corrosion products on specimen surface and generated the corrosion pits. Because of the high stress concentration arising at this corrosion pit, relatively low fatigue limits were obtained for acid fog specimens.
Keywords
Acid fog; Fatigue strength; Rust formation behavior; Weathering steel;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
Times Cited By SCOPUS : 0
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1 Kim, J. H and Kim, M. G., 2000, 'Quantitative Evaluation for the Internal Defect Size Governing the Fatigue Life in Ductile Irons,' Trans. of the KSME(A), Vol.24, No.11, pp. 2742-2748
2 Murakami Y. and Endo M., 1983, 'Estimation of Micro Defects Effect on the Fatigue Strength,' Trans. of the JSME(A), 49-438, pp. 127-136   DOI   ScienceOn
3 Pohang Research Institute of Industrial Science & Technology, Steel Structure Research Laboratory, 1999, 'Guidelines for the Use of Un-coated Weathering Steel Bridges,' BR-D-98-001, I-18-I-19
4 Kim, M. G. et al, 1998, 'A Study on Elucidation of Build up and Behavior of Acidic Precipitation,' J. Korea Air Research Asso., 15-5, pp. 491-498
5 Kim, M. G., Lim, Y. H. and J. H. Kim, 2000, 'A Study on the Corrosion Fatigue Characteristics of SNCM Steel under Acid Fog Environment,' J. Kor. Inst. Met. & Mater., Vol. 38, No. 7, pp. 911-917
6 Pohang Research Institute of Industrial Science & Technology, Steel Structure Research Laboratory, 'Un-coated Weathering Steel Bridge,' pp. 1-15
7 Kim, M. G., Lim, Y. H. and Kim, M. G., 2000, 'Fatigue Crack Growth Behavior of Ni-Cr-Mo Steel under Acid Fog Environment,' Trans. of the KSME(A), Vol. 24, No. 7, pp. 1841-1846