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Title |
Evaluation of deterioration propagation life of steel bridge paints according to surface treatment methods and heavy-duty painting types
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Authors |
김기혁(Gi-Hyeok Kim) ; 정영수(Young-Soo Jeong) ; 안진희(Jin-Hee Ahn) ; 김인태(In-Tae Kim) |
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DOI |
https://doi.org/10.11112/jksmi.2021.25.1.75 |
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Keywords |
부식촉진시험; 중방식도장; 재도장; 도장내구수명 accelerated corrosion test; heavy duty painting; re-painting; paint deterioration life |
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Abstract |
In this study, to evaluate deterioration propagation life and deterioration curve of the shop painted and field re-painted steel bridges, accelerated corrosion tests were carried out on 4 types of heavy-duty painting systems with different surface treatments. The surface treatments prior to painting were examined by hand tool(SSPC SP-2), power tool(SP-3,) or blast cleaning(SP-10) considering shop painting and field re-painting. The paint deterioration curves for each painting system and surface treatment were evaluated based on corrosion propagation from the initial paint defects. From the test results, the paint deterioration life of shop painted and field re-painted system was evaluated and compared by using corrosivity categories and durability performance evaluation of structural steel. The deterioration propagation life of shop and field paint was estimated in 18 to 21 years and 5.3 to 8.0 years with atmospheric corrosion category C4.
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