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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2021.1
- 수록면
- 1,519 - 1,530 (12page)
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This work aims to investigate the possible use of the palm kernel cake powder (Elaeis guineensis Jacq.) as corrosioninhibitor for ASTM 1020 carbon steel in acidic media (0.5 mol L−1 HCl). The investigation was carried out using electrochemicalimpedance spectroscopy (EIS), polarization curves, gravimetric technique and scanning vibrating electrode technique(SVET). Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) were employed aschemical and surface characterization techniques, respectively. The results of the EIS and gravimetric tests showed that thesubstance acts as an effective corrosion inhibitor and inhibition efficiency (IE) increases according with the increase of thecorrosion inhibitor concentration in the aggressive medium. The highest IE of 87% was obtained for the highest corrosioninhibitor concentration used (1.77 g/L). The polarization curves revealed a mixed inhibitor. The adsorption of the studiedinhibitor on carbon steel surface obeyed Langmuir isotherm. The SVET measurements did not reveal anodic or cathodicactivities in the substrate surface in the presence of the inhibitor, revealing that the corrosion inhibitor was able to block bothreactions. FTIR analyses identified in the powder the presence of hydroxyl group, aromatic rings, nitrogen and oxygen in suchgroups as amines and oleaginous acid, which can be responsible for the inhibitory properties of the whole material. SEManalyses showed that the corrosion process was retarded when the inhibitor was added to electrolyte. The results indicatethat the powder of palm kernel cake is promising for use as corrosion inhibition purpose for carbon steel in acidic media.
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