AZ31 마그네슘 합금의 플라즈마전해산화 피막 형성에 미치는 수산화 이온 및 규산 이온의 영향
Effects of Hydroxide and Silicate ions on the Plasma Electrolytic Oxidation of AZ31 Mg Alloy
2
조회
0
다운로드
20
인용
0
참고문헌
키워드
초록
Formation behavior of PEO (Plasma Electrolytic Oxidation) films on AZ31 Mg alloy was studied in aqueous solutions containing various concentrations of hydroxide ion (OH−) and silicate ion (SiO32−) by voltage-timecurves, and corrosion resistance of the PEO film-covered specimen was investigated by immersion test in0.5 M NaCl solution. From the analyses of the voltage-time curves, it is suggested that two different typesof anions are essentially needed for the formation of PEO films on AZ31 Mg alloy: film formation agentand local film breakdown agent. SiO32− ion acts only as a film formation agent but OH- ion acts not onlyas a film formation agent but also film breakdown agent. The PEO films prepared on AZ31 Mg alloy inalkaline silicate solution showed very good corrosion resistance without any pitting or filiform corrosionsup to 480 h of immersion in 0.5 M NaCl.
Abstract
Formation behavior of PEO (Plasma Electrolytic Oxidation) films on AZ31 Mg alloy was studied in aqueous solutions containing various concentrations of hydroxide ion (OH−) and silicate ion (SiO32−) by voltage-timecurves, and corrosion resistance of the PEO film-covered specimen was investigated by immersion test in0.5 M NaCl solution. From the analyses of the voltage-time curves, it is suggested that two different typesof anions are essentially needed for the formation of PEO films on AZ31 Mg alloy: film formation agentand local film breakdown agent. SiO32− ion acts only as a film formation agent but OH- ion acts not onlyas a film formation agent but also film breakdown agent. The PEO films prepared on AZ31 Mg alloy inalkaline silicate solution showed very good corrosion resistance without any pitting or filiform corrosionsup to 480 h of immersion in 0.5 M NaCl.
참고문헌 (32)
- Shunsuke Yagi, "Surface modification of ACM 522 magnesium alloy by plasma electrolytic oxidation in phosphate electrolyte", Corros. Sci, 57, pp.74~ (2012)
- R. F. Zhang, "Film formation in the second step of micro-arc oxidation on magnesium alloys", Corros. Sci, 52, pp.1285~ (2010)
- A. Da Forno, "Effect of the electrolytic solution composition on the performance of microarc anodic oxidation films formed on AM60B magnesium alloy", Surf. and Coat. Tech, 205, pp.1783~ (2010)
- R. F. Zhang, "Formation of micro-arc oxidation coatings on AZ91HP magnesium alloys", Corros. Sci, 51, pp.2820~ (2009)
- Akihiro Yabuki, "Anodic films formed on magnesium in organic, silicate-containing electrolytes", Corros. Sci, 51, pp.793~ (2009)
- Liyuan Chai, "Anodizing of magnesium alloy AZ31 in alkaline solutions with silicate under continuous sparking", Corros. Sci, 50, pp.3274~ (2008)
- R. Arrabal, "Corrosion resistance of WE43 and AZ91D magnesium alloys with phosphate PEO coatings", Corros. Sci, 50, pp.1744~ (2008)
- C. -E. Barchiche, "Corrosion resistance of plasma-anodized AZ91D magnesium alloy by electrochemical methods", Electrochim. Acta, 3, pp.417~ (2007)
- Sungmo Moon, "Generation Mechanism of Microdischarges During Plasma Electrolytic Oxidation of Al in Aqueous Solutions", Corrosion Science, 51, pp.1506~ (2009)
- S. Moon, "Anodic oxidation of Mg-Sn alloys in alkaline solutions", Corrosion Science, 65, pp.494~ (2012)
- S. Moon, "Corrosion behavior of PEO-treated AZ31Mg alloy in chloride solution", Journal of Solid State Electrochemistry, 18, pp.341~ (2014)
- M. Abulsain, "Anodic oxidation of Mg–Cu and Mg–Zn alloys", Electrochim. Acta, 49, pp.899~ (2004)
- F. A. Bonilla, "Enrichment of alloying elements in anodized magnesium alloys", Corros. Sci, 44, pp.1941~ (2002)
- Z. Shi, "Corrosion resistance of anodised single-phase Mg alloys", Surf. and Coat. Tech, 201, pp.492~ (2006)
- J. Liang, "Comparison of electrochemical corrosion behaviour of MgO and ZrO2 coatings on AM50 magnesium alloy formed by plasma electolytic oxidation", Corros. Sci, 51, pp.2483~ (2009)
- W. Li, "Effects of silicate concentration on anodic films formed on AZ91D magnesium alloy in solution containing silica sol", Surface and Coatings Technology, 201, pp.2505~ (2006)
- T. S. Lim, "Electrochemical corrosion properties of CeO2-containing coatings on AZ31 magnesium alloys prepared by plasma electrolytic oxidation", Corros. Sci, 62, pp.104~ (2012)
- F. Liu, "Corrosion behavior of the composite ceramic coating containing zirconium oxides on AM30 magnesium alloy by plasma electolytic oxidation", Corros. Sci, 53, pp.3845~ (2011)
- S. Yagi, "Surface modification of ACM522 magnesium alloy by plasma electolytic oxidation in phosphate electrolyte", Corros. Sci, 57, pp.74~ (2012)
- C. S. Wu, "Study on the anodizing of AZ31 magnesium alloys in alkaline borate solutions", Applied Surface Science, 253, pp.3893~ (2007)
- C. -E. Barchiche, "Corrosion behaviour of Sn-containing oxide layer on AZ91D alloy formed by plasma electrolytic oxidation", Surf. and Coat. Tech, 202, pp.4145~ (2008)
- S. Verdier, "Formation, structure and composition of anodic films on AM60 magnesium alloy obtained by DC plasma anodising", Corros. Sci, 47, pp.1429~ (2005)
- S. V. Lamaka, "Complex anticorrosion coating for ZK30 magnesium alloy", Electrochimica Acta, 55, pp.131~ (2009)
- Mandelli, "A composite coating for corrosion protection of AM60B magnesium alloy", Surface and Coatings Technology, 205, pp.4459~ (2011)
- R. Arrabal, "Corrosion behaviour of a magnesium matrix composite with a silicate plasma electrolytic oxidation coating", Corrosion Science, 52, pp.3738~ (2010)
- M. Santamaria, "The influence of surface treatment on the anodizing of magnesium in alkaline solution", Electrochimica Acta, 56, pp.10533~ (2011)
- C. L. Chu, "Effects of sealing treatment on corrosion resistance and degradation behavior of micro-arc oxidized magnesium alloy wires", Applied Surface Science, 271, pp.271~ (2013)
- Ugur Malayoglu, "Influence of post-treatment on the corrosion resistance of PEO coated AM50B and AM60B Mg alloys", Surface and Coatings Technology, 205, pp.1793~ (2010)
- Y. -I. Choi, "Synergistic corrosion protection for AZ31 Mg alloy by anodizing and stannate post-sealing treatments", Electrochim. Acta, 97, pp.313~ (2013)
- G. -L. Song, "An irreversible dipping sealing technique for anodized ZE41 Mg alloy", Surface and Coatings Technology, 203, pp.3618~ (2009)
- P. Shi, "Improvement of corrosion resistance of pure magnesium in Hanks’ solution by microarc oxidation with sol–gel TiO2 sealing", Journal of Alloys and Compounds, 469, pp.286~ (2009)
- A. Alabbasi, "Biodegradable polymer for sealing porous PEO layer on pure magnesium: An in vitro degradation study", Applied Surface Science, 301, pp.463~ (2014)