Browse > Article
http://dx.doi.org/10.3740/MRSK.2022.32.10.442

Effect of Sealing on the Corrosion Resistance of Plasma-Sprayed Alumina Coatings  

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.)
Publication Information
Korean Journal of Materials Research / v.32, no.10, 2022 , pp. 442-447 More about this Journal
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
plasma spray coating; alumina; pores; sealing; corrosion;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 Q. Wang, C. S. Ramachandran, G. M. Smith and S. Sampath, Tribol. Int., 116, 431 (2017).   DOI
2 H. J. Kim, C. H. Lee and Y. G. Kweon, Surf. Coat. Technol., 139, 75 (2001).   DOI
3 S. Liscano, L. Gil and M. H. Staia, Surf. Coat. Technol., 118, 135 (2004).   DOI
4 E. P. Kwon, D. Y. Kim and J. K. Lee, Korean J. Mater. Res., 26, 542 (2016).   DOI
5 J. G. Odhiambo, W. G. Li, Y. T. Zhao and C. L. Li, Coatings, 9, 460 (2019).   DOI
6 U. Klement, J. Ekberg and S. T. Kelly, J. Therm. Spray Technol., 26, 456 (2017).   DOI
7 Y. H. Jeong, U. H. Nam, E. S. Byon, T. I. Kang and C. Y. Kang (in Korean), J. Korean Inst. Surf. Eng., 47, 323 (2014).   DOI
8 J. Knuuttila, P. Sorsa and T. Mantyla, J. Therm. Spray Technol., 8, 249 (1999).   DOI
9 T. V. Nguyen, T. A. Nguyen, H. T. Pham, L. T. Pham, P. T. Nguyen, T. B. Dao, T. V. Trinh, D. Vu, and Q. T. Le, J. Therm. Spray Technol., 31, 269 (2022).   DOI
10 E. Sadeghi, N. Markocsan and S. Joshi, J. Therm. Spray Technol., 28, 1749 (2019).   DOI