전기화학적 프로세스에 의한 아라고나이트 결정구조 탄산칼슘 막의 형성 및 제어

• Published in: Biuletyn Uniejowski Vol. 51; no. 5; pp. 325 - 331
• Main Authors: 이승효(Seung-Hyo Lee), 이명훈(Myeong-Hoon Lee)
• Format: Journal Article
• Language: Korean
• Published: 한국표면공학회 2018
• Subjects: 기계공학; Aragonite; Calcium carbonate films; Calcite; Electro-chemical process
• ISSN: 1225-8024; 2299-8403; 2288-8403
• DOI: 10.5695/JKISE.2018.51.5.325

Calcium carbonate($CaCO_3$) films were formed by an eco-friendly electro-chemical technique on steel substrates in synthesized distilled water solutions containing $NaHCO_3$, $CaCl_2$ and $MgCl_2$ with different ratio respectively. It was investigated to confirm the effect of $Mg^{2+}$ concentration by Scanning Electron Microscopy(SEM), Energy Dispersive x-ray Spectroscopy(EDS) and X-Ray Diffraction(XRD) respectively. From an experimental result, only calcite crystals were found in solution containing no $Mg^{2+}$. By increasing concentration of $Mg^{2+}$, deposition rate decreased and crystal structure was transformed form calcite to aragonite. In case of including $MgCl_2$ 300mM in synthesized solutions containing $NaHCO_3$, $CaCl_2$ 60mM, it was showed over the 90% of aragonite contents which have quite high deposition rate of aragonite. Also, it was confirmed that $Mg^{2+}$ acted as inhibitor on the films which made transforming from calcite to aragonite.