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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록· 키워드
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The peculiar feature of cathodic protection in seawater has the capability to form mineral calcareous deposits such as magnesium and calcium on metal surfaces. It is assumed that OH? ions are generated close to the metal surface as a result of cathodic protection and generated OH? ions increases the pH of the metal/seawater interface outlined as the following formulae. (1) O₂+ 2H₂O + 4e→4OH?, or (2) 2H₂O + 2e→H₂+ 2OH?. And high pH causes precipitation of Mg(OH)₂ and CaCO₃ in accordance with the following formulae. (1)Mg<SUP>2+</SUP>+ 2OH?→Mg(OH)₂, (2) Ca<SUP>2+</SUP>+ CO₃<SUP>2?</SUP>→CaCO₃. The focus of this study was to increase the amount of CO₃<SUP>2?</SUP> with the injection of CO2 gas to the solution for accelerating process of the following formulae. (1) H₂O+CO₂→H₂CO₃, (2) HCO<SUP>3?</SUP>→ H++ CO₃<SUP>2?</SUP>. Electrodeposit films were formed by an electro-deposition technique on steel substrates in solutions of both natural seawater and natural seawater dissolved CO₂ gas with different current densities, over different time periods. The contents of films were investigated by scanning electron microscopy(SEM) and X-ray diffraction(XRD). The adhesion and corrosion resistance of the coating films were evaluated by anodic polarization. From an experimental result, only CaCO₃ were found in solution where injected CO₂ gas regardless of current density. In case of injecting the CO₂ gas, weight gain of electrodeposits films hugely increased and it had appropriate physical properties.
목차
Abstract
1. 서론
2. 실험 방법
3. 결과 및 고찰
4. 결론
References
참고문헌 (9)
참고문헌 신청
D. F. Hassonand / 1998 / Materials for Marine System and Structures / Academic Press
W. H. Hartt / 1984 / Corrosion 40:609
C. Barchiche / 2003 / Characterization of Calcareous Deposits in Artificial Sea Water by Impedances Techniques : 3-deposit of CaCO3 in the Presence Mg2+ / Electrochimica Acta 48:1645
S-H. Lin / 1988 / Corrosion 44(9):615
H. J. Ryu / 2000 / Electro-deposit Formed by Mesh-Electrodeposition Technology on Steel Plate in Seawater and Their Corrosion Resistance
W. H. Hartt / 1984 / Corrosion 40:609
C. Barchiche / 2003 / Characterization of Calcareous Deposits in Artificial Sea Water by Impedances Techniques : 3-deposit of CaCO3 in the Presence Mg2+ / Electrochimica Acta 48:1645
S-H. Lin / 1988 / Corrosion 44(9):615
H. J. Ryu / 2000 / Electro-deposit Formed by Mesh-Electrodeposition Technology on Steel Plate in Seawater and Their Corrosion Resistance
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UCI(KEPA) : I410-ECN-0101-2015-580-001280968