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윤주희 ( Juhee Yun ),이두열 ( Dooyoul Lee ),박승렬 ( Sungryul Park ),김민생 ( Min-saeng Kim ),최동수 ( Dongsu Choi ) 한국부식방식학회 2021 Corrosion Science and Technology Vol.20 No.2
Atmospheric corrosion severity associated with aircraft parking environment was studied using metallic specimens, and temperature and humidity sensors installed at each aircraft operating base. Data were analyzed after a year of exposure. Silver was used to measure chloride deposition by integrating X-ray photoelectron spectroscopy depth profiles. Carbon steel was utilized to determine the corrosion rate by measuring the weight loss. The time of wetness was determined using temperature and humidity sensor data. Analysis of variance followed by Tukey’s “honestly significant difference” test indicated that atmospheric environment inside the shelter varied significantly from that of unsheltered parking environment. The corrosion rate of unsheltered area also varies with the roof. Hierarchical clustering analysis of the measured data was used to classify air bases into groups with similar atmospheric corrosion. Bases where aircraft park at a shelter can be grouped together regardless of geographical location. Unsheltered bases located inland can also be grouped together with sheltered bases as long as the aircraft are parked under the roof. Environmental severity index was estimated using collected data and validated using the measured corrosion rate.
이두열(Dooyoul Lee),김경우(Kyungwoo Kim),박승렬(Sungryul Park),김민생(Minsaeng Kim),신규철(Gyuchul Shin) 대한기계학회 2018 大韓機械學會論文集A Vol.42 No.8
습도제어를 통한 항공기 부식방지 방법(Controlled Humidity Protection : CHP)의 효과를 연구하였다. 서산지역에서 운용 중인 항공기 4대를 대상으로 2년 간 CHP를 적용하였다. CHP 적용 항공기 내부 상대습도는 비적용 항공기에 비해 일정한 수준을 나타내나 양쪽 모두 외부에 비해 낮은 상대습도를 나타내었다. 항공기 엄체호 내부에서 주요 재료의 대기부식위험도는 ISO 9223 기준 중간수준이었다. 항전장비 93종에 대한 통계분석결과 1종에서 유의미한 평균고장시간 감소를 확인하였다. 따라서 서산지역 항공기를 대상으로 한 CHP는 대기부식관련 결함 예방효과가 높지 않은 것으로 판단된다. The effect of controlled humidity protection (CHP) on aircraft operated at Seosan area was studied. Aircraft with CHP showed less variation in relative humidity (RH) than non-CHP aircraft, but the RH of avionics bay of both cases were lower than external RH. Corrosion severity index (CSI) based on ISO 9223 was measured. The CSI of an aircraft shelter was moderate. Failure data were collected and analyzed for 93 line replaceable units (LRUs). Among 93 LRUs, 5 LRUs were analyzable, and only one LRU had a significantly higher mean time between failure (MTBF) due to CHP. As a conclusion, the effect of CHP on aircraft at Seosan was not an effective measure of corrosion protection.