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http://dx.doi.org/10.7781/kjoss.2016.28.5.373

Experimental Evaluation of Weathering Performance for Duplex Coating Systems Combining Thermal Spraying Metals and Painting  

Kim, In Tae (Dept. of Civil Engineering, Pusan National University)
Jun, Je Hyong (Dept. of Civil Engineering, Pusan National University)
Cha, Ki Hyuk (Bridge Manage Division, Busan Infrastructure Corporation)
Jeong, Young Soo (Dept. of Civil Engineering, Kyushu University)
Ahn, Jin Hee (Dept. of Civil Engineering, Gyeongnam National University of Science and Technology)
Publication Information
Journal of Korean Society of Steel Construction / v.28, no.5, 2016 , pp. 373-382 More about this Journal
Abstract
Painting or thermally sprayed metal coating is often used in corrosion protection of steel structures. In recently, duplex coating system which combines thermally sprayed metals with paint is selected as a new generic type of coatings on steel structures under the highly corrosive environments. In this study, the structural steel specimens were surface treated, thermally sprayed with zinc, zinc-15%aluminum alloy, aluminum and aluminum-5%magnesium alloy, and finally sealing or painted with acrylic urethane. And as a reference specimens, steel specimens were painted with acrylic urethane after surface treatment. Circular defects with 1.0, 3.0 and 5.0 mm in diameters and line defect with 2.0 mm width, which reach the steel substrate were created on all specimens. The specimens were exposed into an environmental testing chamber controlled by the ISO 20340, which is a laboratory cyclic accelerated exposure test condition of spraying/UV/low temperature, for up to 175 days. Based on the corrosion tests, corrosion deterioration from the initial defects were evaluated and weathering performance of the specimens are compared.
Keywords
Corrosion; Steel structure; Duplex coating; Thermal spraying; Painting; Weathering performance;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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