Corrosion Properties of Atomic Layer Deposited TiO2, Al2O3 and TiO2-Al2O3 Nanolaminated Film Coated 316L Stainless Steel
원자층 증착법에 의한 TiO2, Al2O3, 및 TiO2-Al2O3 나노라미네이트 박막이 316L Stainless Steel의 부식특성에 미치는 영향
이우재;만지흠;김다영;장경수;최현진;최우창;권세훈;
Lee, Woo-Jae;Wan, Zhixin;Kim, Da Young;Jang, Kyung Su;Choi, Hyun-Jin;Choi, Woo-Chang;Kwon, Se Hun;
부산대학교, 재료공학부;(주)서영, 나노융합사업팀;부산테크노파크, 멤스나노부품생산센터;
School of Materials Science and Engineering, Pusan National University;Nano Convergence Team, Seo Yeong Co. Ltd.;MEMS/NANO Component Production Center, Busan Techno Park;
DOI : 10.5695/JKISE.2017.50.1.35
$TiO_2$, $Al_2O_3$, and $TiO_2-Al_2O_3$ nanolaminated films were grown by atomic layer deposition (ALD) on the 316L stainless steel (SS316L) substrates at a temperature of $150^{circ}C$. The growth kinetics of $ALD-TiO_2$ and $Al_2O_3$ thin films were systematically investigated in order to precisely control the thickness of each layers in the $TiO_2-Al_2O_3$ nanolaminated films using a high-resolution transmission electron microscopy. And, the exact deposition rates of $ALD-TiO_2$ on $Al_2O_3$ surface and $ALD-Al_2O_3$ on $TiO_2$ surface were revealed to be 0.0284 nm/cycle and 0.11 nm/cycle, respectively. At given growth conditions, the microstructures of $TiO_2$, $Al_2O_3$ and $TiO_2-Al_2O_3$ nanolaminated films were amorphous. The potentiodynamic polarization test revealed that the $TiO_2-Al_2O_3$ nanolaminated film coated SS316L had a best corrosion resistance, although all ALDcoated SS316L exhibited a clear improvement of the corrosion resistance compared with a bare SS316L.