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Integrity Assessment of Obsolete Thermal Storage Tank in District Heating System
지역난방 노후 축열조의 부식 건전성 평가 및 고찰
Daeho Yun, Hobyung Chae, Heesan Kim, Jung-Gu Kim, Woo Cheol Kim, Tae Baek Ha, Jaehyuk Jang, Joon Cheol Jeong, Soo Yeol Lee
윤대호, 채호병, 김희산, 김정구, 김우철, 하태백, 장재혁, 정준철, 이수열
Korean J. Met. Mater. 2020;58(10):693-702.   Published online 2020 Oct 5
DOI: https://doi.org/10.3365/KJMM.2020.58.10.693

Abstract
The thermal storage tank in a district heating system is a component that stores excess heat during normal operation and releases the stored heat to increase the efficiency of the system, when the heat source is stopped or additional demands occur. Recently, an obsolete thermal storage tank was dismantled for..... More

                        
Study on the Effect of the Localized Electrode Degradation on Weldability During an Electrode Life Test in Resistance Spot Welding of Ultra-High Strength Steel
초고강도강 저항 점용접 연속타점시 전극의 국부적 합금화 현상이 용접품질 저하에 미치는 영향 연구
Jae-Won Kim, Siva Prasad Murugan, Nam Hyun Kang, Yeong-Do Park
김재원, Siva Prasad Murugan, 강남현, 박영도
Korean J. Met. Mater. 2019;57(11):715-725.   Published online 2019 Nov 5
DOI: https://doi.org/10.3365/KJMM.2019.57.11.715

Abstract
Evaluation of electrode degradation in resistance spot welding of 1180TRIP steel was carried out through an electrode life test, and weldability testing was performed by the measurement of the nugget size, the peak load analysis and the measurement of the electrode tip size at 30 intervals. Analysis of the change..... More

                        
Photocatalytic Characterization of TiO<sub>2</sub> Nanotubes with Pd Particles Synthesized by Photoreduction Process
광환원반응을 통한 TiO2/Pd 복합광촉매 제조와 광촉매 특성
Jong-Ho Lee, Hong-Joo Ahn, Jeong-Il Youn, Young-Jig Kim, Su-Jeong Suh, Han-Jun Oh
이종호, 안홍주, 윤정일, 김영직, 서수정, 오한준
Korean J. Met. Mater. 2019;57(8):510-520.   Published online 2019 Jul 8
DOI: https://doi.org/10.3365/KJMM.2019.57.8.510

Abstract
To decompose dye in aqueous solution, Pd nanoparticle-decorated TiO2 nanotube photocatalysts were fabricated through electrochemical anodization and photoreduction processes. Morphological and surface characterization of the TiO2/Pd heterojunction photocatalyst, as well as photoelectrochemical behaviors, were investigated by X-ray diffraction, UV/Vis diffuse reflectance and photocurrent response. It was found that the precipitated..... More

                           Cited By 1
Sulfur Poisoning of Ni Anode as a Function of Operating Conditions in Solid Oxide Fuel Cells
고체산화물 연료전지의 운전 조건에 따른 니켈 전극 황 피독 현상
Ho Seong Lee, Hyun Mi Lee, Hyung-Tae Lim
이호성, 이현미, 임형태
Korean J. Met. Mater. 2018;56(12):893-899.   Published online 2018 Dec 5
DOI: https://doi.org/10.3365/KJMM.2018.56.12.893

Abstract
In the present study, we investigated the sulfur poisoning of the Ni anode in solid oxide fuel cells (SOFCs) as a function of operating conditions. Anode supported cells were fabricated, and sulfur poising tests were conducted as a function of current density, H2S concentration and humidity in the anode gas...... More

                        
Effects of the Air Flow Rate and Electrolyte Thickness on the Durability of Yttria-doped Barium Cerate (BCY)-based Solid Oxide Fuel Cells
BCY 기반 고체산화물 연료전지의 내구성에 영향을 미치는 인자에 대한 연구
Seon Yeong Bae, Mi Young Park, Jong Gyu Lee, Hyung-Tae Lim
배선영, 박미영, 이종규, 임형태
Korean J. Met. Mater. 2017;55(5):335-341.   Published online 2017 May 9
DOI: https://doi.org/10.3365/KJMM.2017.55.5.335

Abstract
Anode-supported yttria-doped barium cerate (BCY) electrolyte cells are fabricated and durability tests are conducted as a function of the current density (cell voltage sign), air flow rate, and BCY electrolyte thickness. As the air flow rate increases and the current density decreases (from negative to positive cell voltage), the cell..... More

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