마그네슘 합금의 방청을 위한 하이브리드 졸-겔 코팅제의 개발
Development of Hybrid Sol-Gel Coating to Prevent Corrosion of Magnesium Alloys
2
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
The high rate of corrosion of magnesium alloys makes it limited for industrial applications. Therefore, surfacetreatment is required to enhance their corrosion resistance. In our study, a chemical conversion coatingfor protecting the corrosion of the magnesium alloy, AZ31B, was prepared by using a phosphate-permanganatesolution. The chemical conversion coating had a limited protection ability due to defects arising from cracksand pores in the coating layer. The sol-gel coating was prepared by using trimethoxymethylsilane (MTMS)and 3-glycidoxypropyltrimethoxysilane (GPTMS) as precursors, and aluminum acetyl acetonate as a ringopening agent. The corrosion protection properties of sol-gel and conversion coatings in 0.35wt% NaClsolution were measured by the electrochemical impedance spectroscopy (EIS) and potentiodynamic polarizationtest. The EIS results indicated that the resistance of the chemical conversion coating with the sol-gel coatingwas significantly improved through the sol-gel sealed phosphate-permanganate conversion coating. The resultsof the potentiodynamic polarization test revealed that the sol-gel coating decreased the corrosion currentdensity (Icorr). The SEM image showed that the sol-gel coating sealed conversion coating and improvedcorrosion protection.
Abstract
The high rate of corrosion of magnesium alloys makes it limited for industrial applications. Therefore, surfacetreatment is required to enhance their corrosion resistance. In our study, a chemical conversion coatingfor protecting the corrosion of the magnesium alloy, AZ31B, was prepared by using a phosphate-permanganatesolution. The chemical conversion coating had a limited protection ability due to defects arising from cracksand pores in the coating layer. The sol-gel coating was prepared by using trimethoxymethylsilane (MTMS)and 3-glycidoxypropyltrimethoxysilane (GPTMS) as precursors, and aluminum acetyl acetonate as a ringopening agent. The corrosion protection properties of sol-gel and conversion coatings in 0.35wt% NaClsolution were measured by the electrochemical impedance spectroscopy (EIS) and potentiodynamic polarizationtest. The EIS results indicated that the resistance of the chemical conversion coating with the sol-gel coatingwas significantly improved through the sol-gel sealed phosphate-permanganate conversion coating. The resultsof the potentiodynamic polarization test revealed that the sol-gel coating decreased the corrosion currentdensity (Icorr). The SEM image showed that the sol-gel coating sealed conversion coating and improvedcorrosion protection.
참고문헌 (18)
- Myer Kutz, "Mechanical Engineers' Handbook: Materials and Mechanical Design" (2006), John Wiley & Sons
- 장동환, "마그네슘 합금 AZ31B 판재를 이용한 자동차 하이브리드 후드 개발 프로세스", 소성∙가공, 20(2), pp.160~166 (2011), 한국소성∙가공학회
- R. C. Weast, "CRC handbook of Chemistry and Physics. 61st ed" (1981), CRC Press Inc
- U. C. Nwaogu, , Corros. Sci., 51, pp.2544~ (2009)[DOI]
- W. Zhou, , Corros. Sci., 50, pp.329~ (2008)[DOI]
- X. Liu, , T. Nonferr. Metal. Soc., 20, pp.2185~ (2010)[DOI]
- M. Turhan, , Electrochim. Acta, 55, pp.250~ (2009)[DOI]
- A. Zomorodian, , Surf. Coat. Technol., 206, pp.4368~ (2012)[DOI]
- A. Nemcova, , Electrochim. Acta, 219, pp.28~ (2016)[DOI]
- J. Liu, , J. Mater. Chem., 17, pp.4430.~ (2007)[DOI]
- T.L. Metroke, , Prog. Org. Coat., 44, pp.295~ (2002)[DOI]
- H. Shi, , Prog. Org. Coat., 66, pp.183~ (2009)[DOI]
- 김명환, "비크롬계 인산-과망간산 용액을 이용한 AZ31 마그네슘 합금의 산처리에 따른 화성 피막의 특성 평가", 한국표면공학회지, 43(2), pp.73~79 (2010), 한국표면공학회
- 이동욱, "방청용 유", 무기 하이브리드 코팅제의 제조, 2013, pp.19(3), 10~18[DOI]
- C. J. Brinker, "Sol-gel science; The physics and chemistry of sol-gel processing" (1990), Academic Press, Inc.
- G. Socrates, "Infrared and Raman Characteristic Group Frequencies : Tables and Charts 3rd ed." (2001), John Wiley & Sons
- E. Principles, "Application notes CORR-1 : Basics of Corrosion Measurements, princeton applied research", ~ (1980)
- I. G. A. Arwati, , World Chem. Eng. J., 1, pp.65~ (2017)