정성일의 <오아시스> 비판에 투영된 관점의 가능성과 한계 - 정성일 영화비평에 대한 일고찰 -

박우성 ( Park Woo-sung ),정수완 ( Jung Su-wan ) 국제어문학회 2015 국제어문 Vol.0 No.67

본 연구는 영화비평가 정성일이 <오아시스>(이창동, 2002)에 대해서 쓴 비평문「판타지, 기만적인 환영술」을 비판적으로 분석한다. 그간 한국영화계에서 영화비평은 독립적인 분과로 논의되지 못했다. 산적하는 영화들 안에서 영화적 가치를 발굴해 정리하고 새로운 영화 언어를 대중 언어로 번역하는 것이 영화비평의 역할이라 했을 때 이는 문제가 있다. 영화비평에 대한 그간의 접근은 한국영화사의 맥락에서 특정 영화비평집단을 세대론적으로 조망하거나 특정 개인의 비평 세계를 전기적 관점에서 서술한 것에 머문 한계가 있다. 정성일은 1990년대 한국영화비평의 전성기를 주도했던 한국의 대표적인 영화비평가이다. 호불호가 갈리지만 그의 글은 대중들 사이에서 영화비평이라는 개념이 성립되는 과정에 주요한 이미지를 제공했다. 특히 본 연구가 다루는 정성일의<오아시스> 비판은 논쟁 참여를 전제해 작성된 덕분에 비평담론 자체가 중심에 서있고 무엇보다 정성일의 영화에 대한 태도가 여타의 글에 비해 명확하게 드러나는 특징이 있다. 더구나 그 논쟁은 영화의 윤리, 완성도, 자의식 등을 두고 벌어진 영화비평계 내부의 마지막 논쟁이라는 영화비평사적 의의도 있다. 나아가 영화 한편에 대한 긴 글이기 때문에 한국의 대표적 비평가가 영화를 비평하는 구체적 실천 양상이 현장감 있게 녹아 있기도 하다. 영화를 종교처럼 대한다는 비판이 존재하지만 정성일 영화비평의 경쟁력은 숏의 배치, 장르 문법, 카메라 시선과 같은 영화의 자의식을 정밀하게 분석하는 것에서 나온다. 영화란 무엇인가와 같은 근본적인 질문에 기반을 둔 이런 태도는 영화를 여타의 학문에 종속시킨 종래의 비평 태도와 차별되며 영화를 진지하게 바라보는 태도를 대중화시킨 의의가 있다. 하지만 그것만큼의 오류도 발견된다. <오아시스>를 비판할 때 투영되는 정성일의 관점의 가능성과 한계를 구체적으로 밝힘으로써 한국영화비평의 전성기를 주도했던 한 영화비평가의 개성적 세계관을 비판적으로 조망하는 것이 본 연구의 목적이다. 독립적인 분과로 인식되기는커녕 죽음까지 운운되는 영화비평의 위기 시대에 한국의 대표적 영화비평가의 세계관이 상징적으로 녹아 있는 글을 정밀하게 분석하는 것은 그것 자체로 의미 있다. This study analyzes the critique “Fantasy, deceptive hallucination” which sung-il jung wrote about < Oasis >(Changdong Lee 2002). Film critique has not been recognized and discussed as an independent field in the Korean film industry so far. It can be problematic if the role of film criticism is to get the cinematic values arranged among the pile of films and to translate new cinematographic language into the public language. The approach to the film critique to this point has limitation that in the context of Korean film industry, it viewed certain group of film critics in the perspective of theory of generation and it described certain person`s world of criticism in a biographical way. sung-il Jung is one of the representative film critics in Korea who lead the golden age of Korean film criticism in the 1990s. His writings provided important image in the process of establishing the concept of film critique among the public, even though they are controversial. The Jung`s criticisms this study exclusively deals with are based on the premise of argumentative participation, so the discourse is central and fundamental, and it brings out the cinematic view of Jung precisely compared to the other writings and articles, which is the advantages of this study. Moreover, the argument has significance in the field of film criticism for being the last dispute inside the field of film critique over the morals, degree of completion, and the consciousness of identity. Above and beyond, because this paper is a long writing about a movie, it contains detailed and vivid practical aspect which the representative critic of Korea criticizes the movie. Although there are criticisms of discussing movies like a form of religion, sung-il Jung`s film critique is competitive for detailed and precise analyze of films` sense of identity such as plot of shots, code of genre, and the eyes of cameras. This attitude based on the fundamental questions such as what is film is considered significant for popularizing and promoting earnest attitude toward movies, and is differentiated with the traditional attitudes of criticism which are to subordinate films in the other fields of study. However, due to being so, some errors are discovered. The purpose of this study is to critically outlook a distinctive world view of a film critic who enjoyed the film critique`s prime by concretely describing its possibilities and limitations through revealing Jung`s point of view which is his prerequisite for watching movies. The work of precise analyzing of one of the Korean representative film critics` writings which contains symbolic world view is significant and meaningful by itself in the time of the film criticisms` crisis when the idea of the demise of film criticism is being mentioned, let alone its separation as the independent field.

문화유산을 활용한 테마파크형박물관에 관한 연구

박소라(Park, So La),우성호(Woo, Sung Ho) 한국실내디자인학회 2013 한국실내디자인학회논문집 Vol.22 No.6

The number of visitors to historic sites and museums in Korea has been on a rapid decrease and in order to search for creative ways to work on the problem, the study proposed a theme park-typed museum with cultural heritage applied and reviewed spatial strategies for such theme park-typed museums. Applied methods of research of this study are as follows. First, in order to understand definitions and current situations of cultural heritage use and theme park-typed museums, the study went thoroughly over all sorts of literature and reports as well as findings of advance researches on how to make a use of cultural heritage. Based on the results of the investigations, the study determined characteristics of the theme park-typed museums with cultural heritage applied which the study was proposing and the characteristics were categorized by type. Considering those characteristics and types gained in the study, the study looked for cultural heritage-based theme parks and museums in the world which were good enough to be used as research subjects in the study from the aspects of profitability and level of awareness. The study examined those theme parks and museums in the world and in the end, it found out ways to adopt the findings to the situations in Korea and discussed expecting effects as well. As to the characteristics of the theme park-typed museums with cultural heritage applied, the study divided those characteristics into mutual cooperation, location, communicability, authenticity, maintainability, education, durability, narrativity, undailiness, interactivity and leisure. The types were categorized into ride, environment direction, cartoon character and souvenir by attraction pattern. When cultural heritage is used actively, it would improve competitiveness of historic cultural sites and museums in return, making people realize the iterative structure of excavation, conservation, maintenance and use of cultural heritage. That would create many kinds of added values, re-discovering culture of the country. At the same time, it would also create a new value of culture as well. Now, it is important for us to do harder with researches on how to evolve museums and exhibition spaces. Considering that, the study is believed to make a contribution to revival of historic sites and museums in Korea but also establishment of scientific strategies.

근린공원 환경의 만족도가 신체활동과 건강에 미치는 영향 - 창원시 성산구와 의창구를 대상으로 -

박경훈,이우성,김태환,김은정,Park, Kyung-Hun,Lee, Woo-Sung,Kim, Tae-Hwan,Kim, Eun-Jung 한국조경학회 2014 韓國造景學會誌 Vol.42 No.3

본 연구의 목적은 경상남도 창원시를 대상으로 근린공원 환경에 대한 만족도가 신체활동과 건강증진 목적의 공원이용횟수와 체질량지수(BMI)에 의한 건강수준에 미치는 영향을 분석하는 것이다. 설문조사는 창원시 성산구와 의창구 도심지역에 분포하는 8개 근린공원의 이용자와 그 주변에 거주하는 429명의 주민들을 대상으로 실시하였고, 설문분석은 근린공원 환경에 대한 만족도가 신체활동과 건강에 미치는 영향을 분석하기 위해 일대일대응 선형회귀분석을 활용하였다. 연구결과를 요약하면, 공원을 이용하지 않는 주된 이유는 시간적 여유의 부족, 공원까지의 이동거리와 소요시간, 공원 내 이용시설의 부족 등이고, 공원을 이용하는 주된 이유는 공원까지의 접근성, 걷기 또는 산책, 휴식시설, 수목이나 그늘, 운동공간의 다양성 등으로 나타났다. 공원 이용자의 경우, 공원에서 걷기나 산책을 가장 많이 하고, 주 2회 이상 평균 10분 정도 걸어가서 1시간 정도 운동을 하는 것으로 나타났다. 공원과 그 주변의 물리적 환경 중에서 집에서 공원까지의 거리와 이동하는 가로 환경에 대한 만족도가 높았고, 공원 내 수공간이나 볼거리 등에 대한 만족도가 낮게 나타났다. 다음으로, 운동목적의 공원이용 여부, 공원이용시간, 공원이용의 만족도와 건강증진 효과, 공원까지의 거리, 따른 건강증진 효과만이 유의수준 10% 이내에서 상호관련성이 있는 것으로 나타났다. 향후에도 공원의 신체활동과 건강 증진 효과에 대한 실증적 사례노약자들의 공원이용 편이성 등이 유의수준 5% 이내에서 신체활동과 건강증진 목적의 공원이용횟수에 긍정적인 영향을 보였고, 체질량지수와는 공원이용에 를 지속적으로 축적해 나갈 필요가 있으며, 이를 통해서 각종 개발용도로 전환되거나 그 면적이 축소되고 있는 도시지역의 공원 및 녹지공간을 보전 확대시켜 나가고, 신체활동 및 건강증진 장소로서의 기능을 제고하기 위한 공원계획 설계 요소를 도출하는데 근거 자료를 제공하는 것이 가능할 것으로 판단된다. The purpose of this study is to analyze the effects of satisfaction in neighborhood park environments located in the Changwon-si of Gyeongsangnam-do, South Korea, on physical activity, the number of parks used for health improvement, and health levels based on Body Mass Index(BMI). Accordingly, a survey was conducted of 429 nearby residents and users of eight neighborhood parks located in urban areas of Seongsan-gu and Uichang-gu in the Changwon-si. The correlation between the environmental perception of neighborhood parks and physical activity and health, which was observed in the survey results, was analyzed using one-by-one linear regression analysis. By summarizing the study results, it was found that the primary reasons for avoiding park use were lack of time, time and effort required to reach the park(i.e., distance from the park), and lack of facilities within the park. Conversely, the primary reasons for using the park included accessibility, walking or strolling, leisure facilities, trees or shade, and diversity in exercise areas. In the case of park users, walking or strolling was the most common activity in the park. On average, park users walked to the parks for 10 minutes and exercised for an hour at least twice per week. With respect to the physical environment of the parks and surrounding areas, park users showed a high level of satisfaction with the distance between their houses and parks and the street environment. On the contrary, they exhibited low levels of satisfaction with water spaces and sightseeing within the parks. Subsequently, it was shown that the number of people using the parks for physical activities and health improvement was positively influenced(within a 5% significance level) by the intent to use the park for exercise, time spent in the park, satisfaction with park use and health improvement, distance to the park, and the convenience of using the park for the elderly. However, only the health improvement gained from park use was found to exhibit a correlation with BMI at the 10% significance level. Continuous accumulation of practical case studies on physical activities in parks and their health improvement effects is required. Through this, park spaces that are under the threat of reduction or elimination owing to various development plans can be conserved and expanded. Furthermore, such case studies can be used to provide data as the basis for deriving park plans and designs that improve parks' functions as sites of physical activity and health improvement.

근린공원에 대한 환경지각이 이용자의 건강증진인식에 미치는 영향 - 창원시의 8개 근린공원을 대상으로 -

박영은,이우성,정성관,박경훈,Park, Young-Eun,Lee, Woo-Sung,Jung, Sung-Gwan,Park, Kyung-Hun 한국조경학회 2015 韓國造景學會誌 Vol.43 No.1

본 연구는 근린공원에 대한 이용자의 공원지각환경이 건강증진인식에 미치는 영향을 분석하기 위해 경상남도 창원시의 8개 근린공원을 대상으로 공원별 현장조사 및 설문조사를 실시하였다. 연구결과에 따르면, 먼저 공원별 공원지각환경에서는 대부분의 공원이 집에서 공원까지의 거리와 집에서 공원까지의 길 환경이 높게 평가된 반면, 수공간과 공원 내 다양한 볼거리는 충분하지 못한 것으로 분석되었다. 다음으로 23개의 지각환경 변수들을 요인분석한 결과, 경관성, 안락성, 접근성, 활동성, 편의성, 쾌적성의 6개 요인으로 분류되었다. 이를 토대로 건강증진인식과 지각환경요인과의 관련성을 분석한 결과, 8개 공원 중 4개 공원에서 지각환경요인이 신체적 건강증진인식에 유의한 영향을 주는 것으로 나타났다. 특히, 접근성과 활동성이 3개의 공원에서 영향력이 있는 변수로 분석되었다. 또한, 심리적 건강증진인식의 경우, 8개 공원 중 5개 공원에서 유의한 영향을 주는 것으로 나타났으며, 접근성이 4개의 공원에서 영향력이 있는 변수로 평가되었다. 이상과 같은 결과들은 기존의 공원 환경을 개선하고, 새로운 공원을 조성하고자 할 때 효율적인 기초자료로 활용될 수 있을 것으로 판단된다. The purpose of this study was to analyze the effect of environmental perception in neighborhood parks on user's recognition of health improvement. This study used objective field survey data and subjective user survey data at 8 neighborhood parks in Changwon City. According to the results, the perceptions of distance and street environment from home to park were evaluated highly but the perception of water spaces and various attractions within the parks were rated lowly in most of parks. As a result of factor analysis, 23 environmental perception variables were classified into 6 factors such as scenery, comfort, accessibility, activity, convenience and amenity. For the result of regression analysis between environmental perceptions and user's recognition of health improvement based on 6 factors, the recognition of physical health improvement was significantly influenced from environmental perception factors in 4 parks among 8 parks. 'Accessibility' and 'activity' were analyzed as the meaningful factors in 3 parks. Also, recognition of mental health improvement was significantly influenced from environmental perception factors in 5 parks among 8 parks and especially 'accessibility' was showed as the significant factor in 4 parks. The findings from this study can contribute to improve the physical environments of the present parks and can be a basic data for new park development.

거주지 주변 환경에 대한 인식이 건강증진 목적의 공원이용에 미치는 영향 - 대구광역시 수성구를 대상으로 -

이우성,정성관,박영은,Lee, Woo-Sung,Jung, Sung-Gwan,Park, Young-Eun 한국조경학회 2015 韓國造景學會誌 Vol.43 No.6

본 연구는 건강증진 목적의 공원이용 유무에 따른 거주지 주변 환경 인식의 차이를 살펴보고 거주지 환경인식특성이 공원이용에 미치는 영향을 분석하였다. 연구대상지는 대구광역시 수성구의 근린공원 및 유원지로 설정하였으며, 총 303명의 설문응답 분석을 통해 결과를 도출하였다. 연구결과를 요약하면, 총 16개의 물리적 환경인식 지표들 중 시장 및 상가시설의 접근성, 대중교통의 이용성, 공원 등 녹지공간의 접근성, 충분한 보도, 횡단해야 하는 도로의 수, 운동인구를 포함한 6개의 지표가 유의한 영향을 미치는 것으로 나타났다. 공원을 이용할 확률은 공원 등 녹지공간의 접근성에 대한 만족도가 증가할수록 2.326배, 주변에 운동하는 인구가 많을수록 1.701배, 횡단해야 하는 도로의 수가 적을수록 1.617배, 충분한 보도가 설치되어 있다고 인식할수록 1.642배 증가하는 것으로 분석되었다. 따라서 건강증진 목적의 공원이용을 활성화하기 위해서는 거주지 주변에 이용 가능한 공원녹지를 확대하고 주민들이 지속적으로 이용할 수 있는 운동 프로그램을 개발하는 것이 중요할 것이다. 또한 주거지와 공원을 연결하는 보행자 전용도로를 계획하는 등 보행의 편의성을 높이기 위한 노력이 필요할 것으로 판단된다. The purpose of this study is to analyze the effect of neighborhood environmental perception on park use for health. The study area is focused on neighborhood parks in Suseong-gu, Daegu city. The analysis results are based on questionnaires of 303 respondents. According to the results, park use for health improvement was significantly associated with the perceptions of accessibility to a marketplace, availability of public transit, accessibility to the park, enough sidewalks, number of crosswalks, and athletic population. The probability of park use increased by 2.326 times as the satisfaction of accessibility to the park increased. Also, greater athletic population, fewer crosswalks, and more sidewalks lead to increase of park use by 1.701, 1.617, and 1.642 times, respectively. Therefore, it is important to increase the available neighborhood parks around residences and to develop exercise programs that people can use continuously in order to vitalize park use for health improvement. Also, it is necessary to improve the convenience of walking such as development of pedestrian streets or malls between residences and parks.

한국인 폐확산능 정상예측식의 임상적 유용성과 정확성

나승원 ( Seung Won Ra ),박태선 ( Tai Sun Park ),홍윤기 ( Yoon Ki Hong ),홍상범 ( Sang Bum Hong ),심태선 ( Tae Sun Shim ),임채만 ( Chae Man Lim ),이상도 ( Sang Do Lee ),고윤석 ( Youn Suck Koh ),김우성 ( Woo Sung Kim ),김동순 ( Dong 대한결핵 및 호흡기학회 2008 Tuberculosis and Respiratory Diseases Vol.64 No.2

연구배경: 폐확산능을 해석하는 데 필요한 정상예측식으로는 한국인을 대상으로 하여 박 등이 개발한 식(박 식)이 있으나 아직 외국 정상예측식을 많이 사용하고 있다. 이에 국내에서 많이 사용하는 외국 정상예측식인 Burrows 식과 박 식의 임상적 유용성과 정확성을 비교하고자 하였다. 방법: 1. 임상적 유용성 연구; 2006년 7월부터 12월까지 6개월간 폐확산능검사를 시행한 환자 중 두 식을 각각 정상예측식으로 적용하였을 때 폐확산능 해석이 다른 276명(대상군 A)을 대상으로 하였다. 대상군 A에게 두 식을 각각 적용하였을 때 폐확산능 해석과 임상적 판단과의 일치도를 비교하여 임상적 유용성을 평가하였다. 2. 간질성폐질환 진단의 정확성 비교; 2001년부터 2006년까지 폐조직검사를 시행하여 확진된 간질성폐질환군과 서울아산병원에서 모집한 정상군을 대상으로 하여 정상예측식으로 두 식을 각각 적용하였을 때 폐확산능 해석의 정확도를 비교하였고, 두 식이 차이가 나는지 맥니머의 카이스퀘어 검정을 하였다. 결과: 1. 임상적 판단과의 일치도 비교; 276명을 임상정보를 토대로 폐확산능을 예측하여 분류한 결과 정상 54명, 감소 220명, 불분명이 2명이었다. 예측식으로 박 식과 Burrows 식을 적용하였을 때 임상적 판단과 일치하는 환자는 각각 78%와 22%이었다(p<0.001). 2. 간질성폐질환 진단의 정확성 비교; 박 식은 민감도 90.1%, 특이도 100%이었고 Burrows 식은 민감도 64.2%, 특이도 100%로 민감도가 통계학적으로 유의하게 박 식이 높았다(p<0.001). 결론: 우리나라 정상예측식인 박 식이 외국 정상예측식인 Burrows 식을 정상예측식으로 적용하는 것보다 임상적 유용성이나 간질성폐질환 진단의 민감도에서 더 우월하였다. 향후 폐확산능검사의 정상예측식으로 박 식을 사용해야 할 것으로 사료된다. Background: Park et al. developed the Korean reference equation for the measurement of diffusing capacity in 1985. However, the equation has not been widely used in Korea and foreign reference equations have been popularly used. We intended to compare the clinical usefulness and the accuracy of the the Korean reference equation (Park`s equation) with that of the foreign equation (Burrows` equation) that is commonly used in Korea. Methods: 1. Evaluation of clinical usefulness; Among 1,584 patients who underwent diffusing capacity (DLCO) at the Asan Medical Center from July to December 2006, group A subjects included 276 patients who had different interpretations of DLCO in trials employing Burrows` equation and Park`s equation. Clinical assessment was decided by consensus of two respiratory physicians. In order to evaluate the clinical usefulness of Burrows` equation and Park`s equation, agreement of clinical assessment and DLCO interpretation were measured. 2. Evaluation of accuracy; Group B subjects were 81 patients with interstitial lung disease (ILD) and 39 normal subjects. The 81 ILD patients were diagnosed following a surgical lung biopsy. The accuracy of diagnosing ILD as well as sensitivity and specificity were evaluated according to the use of the reference equations (Burrows` equation and Park`s equation) for DLCO. Results: Agreement between clinical assessment and interpretation of DLCO was 22% for the use of Burrows` equation and 78% for the use of Park`s equation. The sensitivity and specificity of the Burrows` equation for diagnosing ILD were 64.2% and 100%. The sensitivity and specificity of the Park`s equation for diagnosing ILD were 90.1% and 100%. The sensitivity of the Park`s equation for diagnosing ILD was significantly higher than that of Burrows` equation (p<0.001). Conclusion: The Korean reference equation (Park`s equation) was more clinically useful and had higher sensitivity for diagnosing ILD than the foreign reference equation (Burrows` equation). (Tuberc Respir Dis 2008;64:80-86)

The rs196952262 Polymorphism of the AGPAT5 Gene is Associated with Meat Quality in Berkshire Pigs

Woo Bum Park,Sang Mi An,Go Eun Yu,Seulgi Kwon,Jung Hye Hwang,Da Hye Park,Deok Gyeong Kang,Tae Wan Kim. Hwa Chun Park1. Jeongim Ha*.,Chul Wook Kim* 한국축산식품학회 2017 한국축산식품학회지 Vol.37 No.6

High-quality meat is of great economic importance to the pig industry. The 1-acylglycerol-3- phosphate-O-acyltransferase 5 (AGPAT5) enzyme converts lysophosphatidic acid to phosphatidic acid in the mitochondrial membrane. In this study, we found that the porcine AGPAT5 gene was highly expressed in muscle tissue, influencing meat characteristics, and we also identified a non-synonymous single-nucleotide polymorphism (nsSNP) (rs196952262, c.673 A>G) in the gene, associated with a change of isoleucine 225 to valine. The presence of this nsSNP was significantly associated with meat color (lightness), lower cooking loss, and lower carcass temperatures 1, 4, and 12 h after slaughter (items T1, T4, and T12 on the recognized quality scale, respectively), and tended to increase backfat thickness and the waterholding capacity. These results suggest that nsSNP (c.673A>G) of the AGPAT5 gene is a potential genetic marker of high meat quality in pigs.

Extension of Lance Life by Change of Height of Lances in the Smelting Furnace of Mitsubishi Process

Sung‑Mi Lim,Soo‑Sang Park,Kyung‑Woo Yi 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.10

A Mitsubishi process, which pertains to continuous Cu production, involves a smelting furnace, cleaning furnace, and convertingfurnace connected in series. One of the main issues pertaining to the smelting furnace is the frequent interruption ofoperations required to allow the inspection and replacement of lances, because lances are frequently fractured. The presentstudy was aimed at modifying the operating conditions of the smelting furnace to suppress lance fractures. A numericalmodel was developed to simulate the transport phenomena in the furnace, including multi-phase behaviors. The simulationresults showed that the lances were exposed to a severely erosive atmosphere with high temperatures. Further calculationindicated that raising the positions of the lances could lower the temperature of the lances, and reducing the occurrence ofsplashed melt, which contains erosive sulfides. The smelting furnace was operated under the conditions of the raised lanceheight and attentively monitored for several months. It was confirmed that by implementing such a change of the lanceheights, the occurrence of lance failures has been considerably reduced without notably affecting the reaction ability of thesmelting furnace.

FRP로 보강된 원형 CFT기둥의 구속효과를 고려한 압축내력설계식 제안

박재우(Park Jai-Woo),최성모(Choi Sung-Mo) 대한건축학회 2010 大韓建築學會論文集 : 構造系 Vol.26 No.7

The purpose of this study is to propose the axial load capacity design formula for circular CFT column reinforced by FRP. To propose the equation, 11 specimens' results obtained from Xiao and Park's tests were used in this study. Steel tube and FRP confined concrete strengths were obtained from the Mander equation used in ACI committee 440. The confinement effectiveness coefficient for FRP confined circular CFT column are proposed and confined concrete strengths are also obtained by using the coefficient. Finally, from the obtained concrete strengths, the axial load capacity design formula for FRP reinforced circular CFT columns is proposed and the design equation results are in good agreement with the test results.

Effects of Pilger Rolling and Heat Treatment on Microstructure and Corrosion Resistance of Ag-electroplated 304 Stainless Steel Tubes

Hyun Park,Woo‑Jin Lee,Jae‑Han Son,Han‑Kyun Shin,Sung‑Kyu Hong,Hyo‑Jong Lee 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.8

We introduce a cost-effective method that combines electroplating with metal cold working processes to manufacture compositetubes with robust corrosion resistance. First, a 3-step electroplating process was developed to form an adhesive anduniform Ag coating on the outer wall of a 304 stainless steel tube. The process consisted of a Ni-strike step for removing thepassivation layer of the initial 304 tube, Cu deposition for smoothing the surface by adding a buffer layer, and Ag deposition. To reinforce the interfacial adhesion between the electroplated layers and the 304 tube and increase the area of the Ag coating,a pilger rolling or pilger rolling + heat-treatment process was performed after the Ag electroplating process. Scanningelectron microscopy of the composite tubes after each process indicated that the as-deposited Ag coating changed fromhaving a rough to smooth surface after only pilger rolling and with additional heat treatment. Electron backscatter diffractionanalysis of the microstructures and textures of the tubes revealed that dynamic recrystallization occurred extensively duringpilger rolling, resulting in the formation of a relatively defect-free grain structure without heat treatment. Furthermore,electrochemical polarization curves determined that the Ag-coated composite tubes are superior to the uncoated 304 tubein terms of corrosion resistance under Cl−atmosphere, owing to the formation of a AgCl passivation layer during testing. Surface analysis of the composite tubes suggests that the properties of the AgCl passivation layer are related to the grainsize of the Ag coating and the density of plastic-deformation-induced defects.