Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Effect of Sealing on the Corrosion Resistance of Plasma-Sprayed Alumina Coatings

실링이 플라즈마 스프레이 코팅된 알루미나 코팅재의 내부식성에 미치는 영향

  • Kwon, Eui Pyo (Carbon & Light Materials Application R&D Group, Korea Institute of Industrial Technology) ;
  • Kim, Se Woong (Carbon & Light Materials Application R&D Group, Korea Institute of Industrial Technology) ;
  • Lee, Jong Kweon (Product Development Division, Sewon Hardfacing Co. Ltd.)
  • 권의표 (한국생산기술연구원 탄소경량소재응용연구그룹) ;
  • 김세웅 (한국생산기술연구원 탄소경량소재응용연구그룹) ;
  • 이종권 ((주)세원하드페이싱 제품개발부)
  • Received : 2022.09.29
  • Accepted : 2022.10.11
  • Published : 2022.10.27
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Abstract

Sealing treatment is a post-surface treatment of the plasma spray coating process to improve the corrosion resistance of the coating material. In this study, the effect of the sealing on the corrosion resistance and adhesive strength of the plasma spray-coated alumina coatings was analyzed. For sealing, an epoxy resin was applied to the surface of the coated specimen using a brush. The coated specimen was subjected to a salt spray test for up to 48 hours and microstructural analysis revealed that corrosion in the coating layer/base material interface was suppressed due to the resin sealing. Measurement of the adhesive strength of the specimens subjected to the salt spray test indicated that the adhesive strength of the sealed specimens remained higher than that of the unsealed specimens. In conclusion, the resin sealing treatment for the plasma spray-coated alumina coatings is an effective method for suppressing corrosion in the coating layer/base material interface and maintaining high adhesive strength.

Keywords

Acknowledgement

This research was financially supported by the Ministry of SMEs and Startups under the "Regional Specialized Industry Development Program+(R&D)"(reference number S3196199) supervised by the Korea Institute for Advancement of Technology (KIAT).

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