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中国有色金属学会会刊：英文版 2009年第B9期19卷 50-55页

作者： Seong-Jong kiM seok-ki jang Division of Marine Engineering Mokpo Maritime University

The electro-clean system (ECS), a ballast water management system that eliminates harmful aquatic organisms in ship ballast water via electrochemically produced chloride, was developed. The current density for potentiostatic experiments subjected to seawater with an applied potential (-0.1 V) at various TRC concentrations (2×10-6, 6×10-6, 10×10-6, and 15×10-6) have similar results. The current density at -0.1 V has the highest value compared with that at -0.7 V and -0.4 V. For all concentrations, the current density increases with increasing applied potential.

关键词：含氯化物电化学方法腐蚀特性浓度海水船舶压载水钢铁电流密度

Effects of solution heat treatment on corrosion resistance of 5083F Al alloy

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中国有色金属学会会刊：英文版 2009年第4期19卷 887-891页

作者： Seong-Jong kiM seok-ki jang Division of Marine Engineering Mokpo Maritime University

Aluminum alloys are used as substitutes for fiber reinforced polymer(FRP) in ships and ***,ships constructed with 5000-series Al alloy suffer a little corrosion in the marine environment,when they run in high speed,and high flow rate,***,solution heat treatment was carried out to prevent *** optimal heat treatment involved heating specimens for 120 min at 420 ℃ and then cooling them in *** addition,the optimal ageing condition involved ageing specimens for 240 min at 180 ℃.The slow strain rate test(SSRT) in a seawater revealed that heat treatment under optimal conditions produced improved elongation,time-to-fracture and amount of dimples compared with the as-received specimen.

关键词：铝合金腐蚀性固溶处理热处理生产纤维增强聚合物电阻慢应变速率海洋环境

Electrochemical characteristics of stainless steel using impressed current cathodic protection in seawater

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中国有色金属学会会刊：英文版 2009年第4期19卷 930-934页

作者： seok-ki jang Min-Su HAN Seong-Jong kiM Division of Marine Engineering Mokpo Maritime University

Stainless steels such as STS 304,316 and 630 are frequently used as shaft materials in small fiber reinforced polymer(FRP) fishing *** the shaft material is exposed to a severely corrosive environment such as seawater,it should be protected using appropriate *** impressed current cathodic protection was used to inhibit corrosion in shaft *** anodic polarization,passivity was remarkably more evident in STS 316 stainless steel than in STS 304 and STS *** pitting potentials of STS 304,316,and 630 stainless steels were 0.30,0.323,and 0.260 V,*** concentration polarization due to oxygen reduction and activation polarization due to hydrogen generation were evident in the cathodic polarization trends of all three stainless *** 316 had the lowest current densities in all potential ranges,and STS 630 had the *** analysis showed that STS 316 was the most noble in the *** addition,the corrosion current density was the lowest for STS 316.

关键词：外加电流阴极保护 316不锈钢电化学特性海水腐蚀电流密度材料腐蚀阳极极化 STS

Surface characteristics of chemical conversion coating for Mg-Al alloy

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中国有色金属学会会刊：英文版 2009年第4期19卷 892-897页

作者： Masazumi OkiDO Ryoichi ICHINO Seong-Jong kiM seok-ki jang Nagoya University Division of Marine Engineering Mokpo Maritime University

The chemical conversion coating was formed on Mg alloy for low cost and harmlessness in environment by using the colloidal silica as the main *** film formed at 298 K was thick,which was thought to be the combination of Si and *** salt spray test,the ratio of black rust on the specimen that did not conducted chemical conversion treatment was five times or more than those of the chemical conversion treated *** film of chemical conversion coating produced by alkali treatment process was thinner than the specimen produced in basic chemical conversion treatment solution.

关键词：化学转化膜镁铝合金表面特性环境无害化盐雾试验涂膜厚度低成本硅溶胶

Mechanical and electrochemical characteristics evaluation in annealing treatment for ship material

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中国有色金属学会会刊：英文版 2009年第B9期19卷 40-44页

作者： seok-ki jang Young-Jae JEONG Seong-Jong kiM Division of Marine Engineering Mokpo Maritime University Jeonnam Techno Park

The effect of heat treatment on the electrochemical and mechanical properties of SS400 steel was investigated, and the effects of annealing conditions on notched specimens subjected to the slow strain rate test (SSRT) were studied. The results show that no correlations are observed among the maximum tensile strength, yield strength, and stress corrosion cracking. In contrast, the elongation and time-to-fracture are improved with stress-relieving annealing compared with the as-received condition. The elongation, time-to-fracture, and number of dimples increase with annealing heat treatment.

关键词：退火处理电化学船舶材料特性评价机械 SS400钢应力腐蚀开裂消除应力退火

Electrochemical characteristics and surface morphology in non-chromate chemical conversion coating for Zn-electroplated steel sheets

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中国有色金属学会会刊：英文版 2009年第B9期19卷 45-49页

作者： Masazumi OkiDO Ryoichi ICHINO seok-ki jang Seong-Jong kiM Graduate School of Engineering Nagoya University Division of Marine Engineering Mokpo Maritime University

The corrosion protection property and morphology of colloidal silica conversion films as an alternative to chemical conversion coating(CCC) films were examined. The corrosion behavior was investigated in 3% NaCl solution using electrochemical techniques. Corrosion was implied by the appearance of red rust on the specimen surface. The results show that in 3% NaCl solution, red rust appears at 15-20, 55-70, and 75-85 d on Zn-electroplated steel, colloidal silica conversion-coated specimens, and chemical conversion-coated, specimens, respectively. In the salt spray test, the colloidal silica film provides better corrosion protection than CCC film, i.e., red rust appears at 96 h on the Zn-electroplated steel sheet, at 432 h on the CCC films, and at 888 h on silica conversion coating.

关键词：化学转化膜电镀钢板表面形貌电化学特性 3%NaCl溶液胶体二氧化硅二氧化硅薄膜 CCC认证

Improvement of hydrogen embrittlement and stress corrosion cracking by annealing for Al-4.4Mg-0.6Mn alloy

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Transactions of Nonferrous Metals Society of China 2011年第A1期21卷 17-22页

作者： Seong-Jong kiM Min-Su HAN Seong-Kweon kiM seok-ki jang Division of Marine Engineering Mokpo National Maritime University Media Engineering Seoul National University of Technology

With no annealing treatment, cathodic polarization trends in 5083F A1 alloy revealed concentration polarization and activation polarization. However, the annealed specimens have lower current densities at corrosion protection potential compared to the non-annealed specimen. The results of SSRTs conducted in seawater at the applied potential range of-l.8 V to -0.5 V indicated that the maximum tensile strength, elongation, and time-to-fracture had high values at applied potentials of -0.7 to -1.4 V. The maximum tensile strength, elongation, and time-to-f？acture decreased when the potential values were beyond this range in either anodic or cathodic direction. In general, the increased shear lip caused by annealing treatment indicates elongation. Time-to-fracture would likely increase with elongation. Potentials between -0.5 V to -0.6 V were found to be in the region of stress corrosion cracking. The corrosion protection zone was determined to be -0.7 V to -J,4 V because these potential ranges produced good mechanical properties. Potential less than -1.4 V produced a fractured surface with a mixture of dimples （ductile fractures） and a quasi-cleavage pattern resulting from the effects of hydrogen gas.

关键词： annealing 5083F A1-Mg alloy corrosion seawater slow strain rate tests

Electrochemical characteristics of HVOF spray coated layer with WC-27NiCr and WC-10Co4Cr for Al bronze

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中国有色金属学会会刊：英文版 2012年第S3期22卷 753-759页

作者： Min-su HAN Seung-jun LEE Min-sung kiM seok-ki jang Seong-jong kiM Division of Marine Engineering Mokpo Maritime University

Among the environmentally friendly marine energies,tidal current power plants require low cost because they do not need to construct a large *** power is particularly reliable energy source because the power generation capacity is predictable regardless of weather or *** materials or stainless steel have been used as materials of blades for current power ***,their strength and welding performance generated many problems in field *** alloys with excellent cavitation resistance and corrosion resistance were applied as blade materials to improve the durability of copper *** were coated with WC-27NiCr and WC-10Co4Cr using the high velocity oxy-fuel (HVOF) *** metal spray coating technology has the advantage in terms of the selection of materials for cost effectiveness and environmental effects of corrosion because the properties of the coat layer can be controlled *** with WC-27NiCr and WC-10Co4Cr by HVOF,WC-27NiCr shows better corrosion resistance *** reason for this seems to be that corrosion resistance improves and a stable passive film forms due to the effects of Ni and Cr.

关键词： tidal power copper alloys HVOF coating corrosion resistance

Effects of thickness of Al thermal spray coating for STS 304

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中国有色金属学会会刊：英文版 2009年第4期19卷 925-929页

作者： Min-Su HAN Yong-Bin WOO seok-Cheol KO Young-Jae JEONG seok-ki jang Seong-Jong kiM Division of Marine Engineering Mokpo Maritime University Chungnam Regional Innovation Agency Jeonnam Techno Park

Thermal spray coating presents a sacrificial-anode cathodic protection method since differences between the potentials of materials are *** a base metal is exposed to seawater,due to defect in the thermal spray coating,the metal is protected by the sacrificial anodic characteristics of the coating layer because micro-cells formed by the base metal and the thermal spray coating act as cathodes and anodes,*** coating thickness has little effect on the surface morphology of the ***,the electrochemical properties with the increasing of coating thickness present good results.

关键词：涂层厚度热喷涂 STS 金属接触电化学性能保护方法牺牲阳极阳极涂层

Clinicopathologic significance of GLUT1 expression and its correlation with Apaf-1 in colorectal adenocarcinomas

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World Journal of Gastroenterology 2011年第14期17卷 1866-1873页

作者： Young Jin Jun Se Min jang Hu lin Han ki-seok jang Seung Sam Paik Kang Hong Lee Department of Pathology College of Medicine Hanyang University Seoul 133-792 South Korea Department of Surgery College of Medicine Hanyang University Seoul 133-792 South Korea

AIM:To investigate the role of glucose transporter 1 (GLUT1) expression in colorectal carcinogenesis and evaluate the correlation with clinicopathological parameters and apoptosis-activating factor-1 (Apaf-1) expression in colorectal adenocarcinomas. METHODS:We used tissue microarrays consisting of 26 normal mucosa,50 adenomas,515 adenocarcinomas,and 127 metastatic lesions. Medical records were reviewed and clinicopathological analysis was performed. RESULTS:GLUT1 expression was absent in normal mucosa and low or moderately apparent in 19 cases (38.0%) of 50 adenomas. However,GLUT1 expression was detected in 423 (82.1%) of 515 adenocarcinomas and in 96 (75.6%) of 127 metastatic lesions. GLUT1 expression was significantly correlated with female gender (P = 0.009),non-mucinous tumor type (P = 0.045),poorer differentiation (P = 0.001),lymph node metastasis (P < 0.001),higher AJCC and Dukes stage (P < 0.001 and P < 0.001,respectively). There was a significant inverse correlation between GLUT1 expression and Apaf-1 expression (P = 0.001). In univariate survival analysis,patients with GLUT1 expression demonstrated poor overall survival and disease-free survival (P = 0.047 and P = 0.021,respectively,log-rank test). CONCLUSION:GLUT1 expression was frequently increased in adenocarcinomas and metastatic lesions. GLUT1 expression was significantly correlated with poorer clinicopathologic phenotypes and survival of patients with colorectal adenocarcinomas.

关键词： Adenocarcinoma Colorectum Glucose transporter 1 Apoptosis-activating factor-1 Prognosis Survival