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6061 알루미늄 합금의 플라즈마 전해산화 피막의 표면기공율 및 부식특성에 미치는 Na3PO4 농도 및 NaAlO2 봉공처리의 영향
Effects of Na3PO4 concentration on the porosity of plasma electrolytic oxidation coatings surface on the 6061 Al alloy, and subsequent-NaAlO2 sealing
- 송의석;
- 김용태;
- 최진섭
초록
In this study, surface porosity and corrosion resistance of PEO coatings prepared on the 6061 Al alloy were investigated in terms of sodium phosphate (Na3PO4) concentrations in an alkaline solution and NaAlO2 sealing. The surface morphologies of the PEO coatings clearly show that the coatings film formed in 9 g L-1 had the lowest porosity. The NaAlO2 sealing was found to remove micropores and cracks existing on the surface of PEO coatings. As a result, the NaAlO2 sealing resulted in the movement of corrosion potential toward more positive value and lower corrosion current density.
키워드
6061 Al alloy; Plasma electrolytic oxidation; Sodium phosphate; NaAlO2 sealing
- 제목
- 6061 알루미늄 합금의 플라즈마 전해산화 피막의 표면기공율 및 부식특성에 미치는 Na3PO4 농도 및 NaAlO2 봉공처리의 영향
- 제목 (타언어)
- Effects of Na3PO4 concentration on the porosity of plasma electrolytic oxidation coatings surface on the 6061 Al alloy, and subsequent-NaAlO2 sealing
- 저자
- 송의석; 김용태; 최진섭
- 발행일
- 2019-06
- 유형
- Y
- 저널명
- 한국표면공학회지
- 권
- 52
- 호
- 3
- 페이지
- 117 ~ 122