과제정보
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. RS-2022-00166565).
한국건축시공학회:학술대회논문집 (Proceedings of the Korean Institute of Building Construction Conference)
- 한국건축시공학회 2023년도 봄 학술논문 발표대회
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- Pages.59-60
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- 2023
3.5wt.% NaCl로 오염된 콘크리트 기공 용액에서 아크 용사 공정에 의해 부착된 Al 및 Zn 코팅의 부식 성능
Corrosion Performance of Al and Zn Coatings Deposited by Arc Thermal Spray Process in 3.5 wt.% NaCl-Contaminated Concrete Pore Solution
- 발행 : 2023.05.17
초록
The corrosion of steel rebar embedded in the coastal areas is corroding once the chloride ions ingress through the pores of the concrete. Therefore, in the present study, a 100 ㎛ thick Al and Zn coating was deposited by an arc thermal spray process onto the steel. The corrosion studies of these deposited coatings were assessed in 3.5 wt.% NaCl contaminated concrete pore (CP) solution with immersion periods. The results show that the Al coating is more corrosion resistance compared to the Zn coating attributed to the formation of gibbsite (γ-Al(OH)3) whereas Zn coating exhibits Zn(OH)2 onto the coating surface as passive layer. The Zn(OH)2 is readily soluble in an alkaline solution. Alternatively, γ-Al(OH)3 on the Al coating surface is less solubility in the alkaline pH, which further provides barrier protection against corrosion.