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Title |
Development and Application of Anti-Corrosive Steel Using Electro-Deposition of Sea Water (2)- Evaluation of Application Rebar with Electro-Deposition Using Sea Water
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Keywords |
철근 ; 부식 ; 전착 코팅 ; 내구성능 구조성능 ; Natural Zeolite ; Alkali-activator ; High-performance construction material |
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Abstract |
When RC (Reinforced Concrete) structures are exposed to sea water, steel corrosion can occur and this leads a degradation of structural performance. Referring the electro-deposition system with sea water from the 1st step research, durability and structural performance are evaluated in coated steel and RC members containing it in the 2nd research. In the durability performance test, Half Cell Potential test is performed and the coated steel is evaluated to have the high resistance to corrosion, which shows only 35% of corrosion velocity in normal (bare) steel. In the structural performance test, tensile strength, adhesive strength, and flexural/ shear in RC member are performed. For the electro-deposit coated steel, increasing ratios of 3.2% and 8.8% are evaluated in the test of tensile strength and adhesive strength, respectively. For the structural test in RC member, there is no big difference between RC members with coated and non-coated steel in ultimate load and failure pattern It is evaluated that the chemical compound with CaCO3 and Mg(OH)2 from electro-deposition causes slightly increased structural performance. The electro-deposit coated steel can be more widely applied after performance verification from several tests like fatigue, resistance to impact, and long term-submerging test.
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