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Study of the Corrosion Behaviour, Liquid Metal Embrittlement and Resistance Spot Weldability of Galvannealed Hot Stamping Steel
합금화 용융아연도금 핫스탬핑강의 자동차 차체 적용을 위한 부식 거동, 액상금속취화현상 및 점용접성 연구
Yeonjung Hwang, Chang Wook Lee, Ga-Young Shin, Ji Hong Yoo, Minsu Choi
황연정, 이창욱, 신가영, 유지홍, 최민수
Korean J. Met. Mater. 2019;57(3):193-201.   Published online 2019 Feb 8
DOI: https://doi.org/10.3365/KJMM.2019.57.3.193

Abstract
The hot stamping process is beneficial for fabricating high strength automotive parts without spring back. To suppress high temperature oxidation and decarburization, it is necessary to coat the hot stamping steel. In the present work, the performance of galvannealed coated (GA) hot stamped steel was evaluated. During cyclic corrosion tests,..... More

                        
Analysis on Variations in Underwater Electromagnetic Signals of a Surface Ship as Varying Placement of ICCP Anodes
ICCP 양극 배치 변화에 따른 수중 전자기 신호 변화 분석
Sangkyu Lee, Hyun-Ju Jung, Chang-Seob Yang
이상규, 정현주, 양창섭
Korean J. Met. Mater. 2018;56(8):628-634.   Published online 2018 Aug 5
DOI: https://doi.org/10.3365/KJMM.2018.56.8.628

Abstract
The impressed current cathodic protection (ICCP) is widely used for preventing galvanic corrosion and it strongly influences the underwater electromagnetic signals of a surface ship. For military use, the signals should be reduced to avoid threats such as modern naval weapons triggered by the signals. We analyzed the underwater electric..... More

                        
Analysis of Underwater Electromagnetic Field Reduction by Mixed-type Cathodic Protection Using the Boundary Element Method
경계요소법을 이용한 혼합형 음극방식 적용에 따른 수중 전자기장 감소 연구
Yong-Sang Kim, Sang Jin Ko, Sangkyu Lee, Jung-Gu Kim
김용상, 고상진, 이상규, 김정구
Korean J. Met. Mater. 2017;55(8):591-599.   Published online 2017 Aug 1
DOI: https://doi.org/10.3365/KJMM.2017.55.8.591

Abstract
In this paper, the influence of mixed-type (impressed-current and sacrificial-anode) cathodic protection on an underwater electromagnetic field was investigated using the boundary element method. The current applied for cathodic protection was reduced by installing sacrificial anodes in the stern region. Also, the potential difference produced by the propeller in the..... More

      
Effect of Temperature and Flow Velocity on the Cathodic Protection of Ships and Underwater Electromagnetic Signatures
온도 및 유속이 선박의 음극방식 및 수중 전자기장 신호 특성에 미치는 영향
Yong-Sang Kim, Kyoung-Min Kim, Sangkyu Lee, Jung-Gu Kim
김용상, 김경민, 이상규, 김정구
Korean J. Met. Mater. 2017;55(5):348-356.   Published online 2017 May 9
DOI: https://doi.org/10.3365/KJMM.2017.55.5.348

Abstract
The effects of the temperature and flow velocity on the cathodic protection and underwater electromagnetic signature of ships are investigated using electrochemical tests and boundary element simulations. The corrosion resistance of the materials for the hull and propeller increase at lower temperatures, and the corrosion resistance is significantly decreased under..... More

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