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Experimental Study of The Corrosion Protection Performance of The Metal Spraying Process in accordance with ratio of Zn-Al

Zn-Al의 구성비율에 따른 금속용사 공법의 방식성능에 대한 실험적 연구

  • Kim, Hae (Department of Civil Engineering, Daejin University) ;
  • Eom, Sung-Hyun (Department of Civil Engineering, Daejin University) ;
  • Jeong, Hyun-Gyu (Department of Civil Engineering, Daejin University) ;
  • Lee, Jeong-Bae (GFC R&D, Co., Ltd) ;
  • Kim, Seong-Soo (Department of Civil Engineering, Daejin University) ;
  • Ahn, Jae-Woo (Department of Advanced Materials Science and Engineering, Daejin University)
  • 김해 (대진대학교 토목공학과) ;
  • 엄성현 (대진대학교 토목환경공학과) ;
  • 정현규 (대진대학교 토목환경공학과) ;
  • 이정배 ((주)지에프시알엔디) ;
  • 김성수 (대진대학교 건설시스템공학과) ;
  • 안재우 (대진대학교 신소재공학과)
  • Received : 2017.02.02
  • Accepted : 2017.03.17
  • Published : 2017.04.30

Abstract

This study is an experimental study on the corrosion protection performance according to the configuration ratio of the Zn and Al. A metal spraying was used as the arc metal spraying method, a specimen was produced by varying the proportion ratio and coating thickness of the Zn and Al. Experimental methods visually observed to corrosion of the specimen for 1, 3, 7, 15 days was conducted in accordance with the CASS salt spray test. This study has confirmed that the performance of the corrosion protection improved against the increase in the Al content. Further, it was confirmed that excellent perfomance is exhibited when the coating thickness is secured over $80{\mu}m$. In addition, the SEM analysis was performed to observe the cross-sectional shape of the metal spraying specimen after CASS testing. The analysis result showed that the deterioration of the metal spraying coating layer was reduced as the Al content increases.

본 연구는 금속용사 공법의 희생양극재료인 Zn, Al의 구성비율에 따른 방식성능에 관한 실험적 연구이다. 금속용사의 분사 방법으로는 Arc 금속용사 공법을 사용하였으며, Zn, Al의 구성비율 및 코팅 두께를 달리하여 시편을 제작하였다. 실험방법으로는 CASS 염수분무 실험에 준하여 실시하였으며 CASS 염수분무 시작일로부터 1, 3, 7, 15일 동안 실험체의 부식상태를 육안으로 관찰하였다. 본 연구결과 Al의 함량이 증가함에 따라 부식에 대한 방식성능이 증가함을 확인하였으며, 코팅두께 $80{\mu}m$ 이상을 확보하여야만 우수한 방식성능이 발현되는 것을 확인하였다. 또한 CASS 실험 후 금속용사 실험체의 단면 형상 관찰하기 위해 SEM 분석을 실시하였으며, 분석결과 Al의 함량이 증가할수록 금속용사 코팅층의 열화가 감소하는 것을 확인하였다.

Keywords

References

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