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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2018.12
- 수록면
- 310 - 316 (7page)
- DOI
- https://doi.org/10.14773/cst.2018.17.6.310
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초록· 키워드
오류제보하기
The effect of passive film on corrosion of metals and alloys in a static corrosive environment hasbeen studied by many researchers and is well known, however few studies have been conducted onthe electrochemical measurement of metals and alloys during cavitation corrosion conditions, and thereare no test standards for electrochemical measurements ‘During cavitation’ conditions. This study usedcommercially additive manufactured(AM) pure titanium in tests of anodic polarization, corrosion potentialmeasurements, AC impedance measurements, and repassivation. Tests were performed in 3.5% NaClsolution under three conditions, ‘No cavitation’, ‘After cavitation’, and ‘During cavitation’ condition.
When cavitation corrosion occurred, the passive current density was greatly increased, the corrosionpotential largely lowered, and the passive film revealed a small polarization resistance. The currentfluctuation by the passivation and repassivation phenomena was measured first, and this behavior wasrepeatedly generated at a very high speed. The electrochemical corrosion mechanism that occurredduring cavitation corrosion was based on result of the electrochemical properties ‘No cavitation’, ‘Aftercavitation’, and ‘During cavitation’ conditions.
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