Proceedings of the Korean Institute of Building Construction Conference (한국건축시공학회:학술대회논문집)

The Korean Institute of Building Construction (한국건축시공학회)
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Corrosion resistance performance of arc thermal sprayed Al and Al/epoxy dual metal polymeric coating in 3.5 wt.% NaCl-contaminated concrete pore solution

3.5 wt.% NaCl로 오염된 콘크리트 기공 용액에서 아크 용사 Al 및 Al/에폭시 이중 금속 고분자 코팅의 내식성 성능

  • Published : 2023.11.10
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Abstract

Corrosion of the steel rebar in coastal environment caused huge economical loss of the globe. Therefore, coating on the steel rebar being used to mitigate the corrosion. In the present study, we have applied epoxy coating on arc thermal sprayed Al coating (a dual metal/polymeric coating) vis-à-vis compared with as coated one (Al coating). The corrosion studies were performed in simulated concrete pore solution with 3.5 wt. % NaCl solution. The morphology of the dual epoxy/Al coating is smooth while Al coating shows rankle and defects. Due to defects, Al coating is susceptible to corrosion while dual epoxy/Al coating has performed excellent compared to as coated one at extended period of immersion.

Keywords

Acknowledgement

This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. RS-2022-00166565).

References

  1. Liu YD, ZhouY, Ma XL. Corrosion behaviors of several kinds of arc sprayed metal coatings in 3.5%NaCl solution. Surf. Technol. 2016. p. 71-75.
  2. Lee HS, Singh JK, Park JH. Pore blocking characteristics of corrosion products formed on Aluminum coating produced by arc thermal spray process in 3.5 wt.% NaCl solution. Constr. Build. Mater. 2016. p. 905-916.