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한국부식방식학회(구 한국부식학회)> Corrosion Science and Technology

Corrosion Science and Technology update

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  • : 한국부식학회지(~2001)→Corrosion Science and Technology(2002~)

수록정보
수록범위 : 1권1호(2002)~17권3호(2018) |수록논문 수 : 738
Corrosion Science and Technology
17권3호(2018년) 수록논문
최근 권호 논문
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KCI후보

1Anticorrosion Coatings Obtained by Plasma Electrolytic Oxidation on Implant Metals and Alloys

저자 : S. L. Sinebryukhov , S. V. Gnedenkov , O. A. Khrisanfova , A. V. P

발행기관 : 한국부식방식학회(구 한국부식학회) 간행물 : Corrosion Science and Technology 17권 3호 발행 연도 : 2018 페이지 : pp. 91-100 (10 pages)

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Development of biodegradable implants for treatment of complex bone fractures has recently become one of the priority areas in biomedical materials research. Multifunctional corrosion resistant and bioactive coatings containing hydroxyapatite Ca10(PO4)6(OH)2 and magnesium oxide MgO were obtained on Mg-Mn-Ce magnesium alloy by plasma electrolytic oxidation. The phase and elemental composition, morphology, and anticorrosion properties of the coatings were investigated by scanning electron microscopy, energy dispersive spectroscopy, potentiodynamic polarization, and electrochemical impedance spectroscopy. The PEO-layers were post-treated using superdispersed polytetrafluoroethylene powder. The duplex treatment considerably reduced the corrosion rate (>4 orders of magnitude) of the magnesium alloy. The use of composite coatings in inducing bioactivity and controlling the corrosion degradation of resorbable Mg implants are considered promising. We also applied the plasma electrolytic oxidation method for the formation of the composite bioinert coatings on the titanium nickelide surface in order to improve its electrochemical properties and to change the morphological structure. It was shown that formed coatings significantly reduced the quantity of nickel ions released into the organism.

KCI후보

2Effect of Microstructure on the Environmentally Induced Cracking Behavior of Al-Zn-Mg-Cu-Zr Aluminum Alloy

저자 : Rahul Ghosh , A. Venugopal , Pradeep P I , L. Rama Krishna , P

발행기관 : 한국부식방식학회(구 한국부식학회) 간행물 : Corrosion Science and Technology 17권 3호 발행 연도 : 2018 페이지 : pp. 101-108 (8 pages)

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AA7010 is an Al-Zn-Mg-Cu alloy containing Zr, developed as an alternate to traditional AA7075 alloy owing to their high strength combined with better fracture toughness. It is necessary to improve the corrosion resistance and surface properties of the alloy by incorporating plasma electrolytic oxidation (PEO) method. AA7010-T7452 aluminum alloy has been processed through the forging route with multi-stage working operations, and was coated with 10μm thick Al2O3 ceramic aluminina coating using the plasma electrolytic oxidation (PEO) method. The corrosion, stress corrosion cracking (SCC) and nano-mechanical behaviours were examined by means of potentiodynamic polarization, slow strain rate test (SSRT) and nano-indentation tests. The results indicated that the additional thermomechanical treatment during the forging process caused a fully recrystallized microstructure, which lead to the poor environmental cracking resistance of the alloy in 3.5% NaCl solution, despite the overaging treatment. Although the fabricated PEO coating improved general corrosion resistance, the brittle nature of the coating did not provide any improvement in SCC resistance of the alloy. However, the hardness and elastic modulus of the coating were significantly higher than the base alloy.

KCI후보

3Evaluation of Grooving Corrosion and Electrochemical Properties of H2S Containing Oil/Gas Transportation Pipes Manufactured by Electric Resistance Welding

저자 : Maksudur Rahman , Siva Prasad Murugan , Changwook Ji , Yong Jin Ch

발행기관 : 한국부식방식학회(구 한국부식학회) 간행물 : Corrosion Science and Technology 17권 3호 발행 연도 : 2018 페이지 : pp. 109-115 (7 pages)

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Electrical Resistance Welding (ERW) on a longitudinal seam-welded pipe has been extensively used in oil and gas pipelines. It is well known that the weld zone commonly suffers from grooving corrosion in ERW pipes. In this paper, the grooving corrosion performances of API X65 grade non-sour service (steel-A) and API X70 grade sour gas resistant (steel-B) steel electrical resistance welding pipelines were evaluated. The microstructure of the bondline is composed of coarse polygonal ferrite grains and several elongated pearlites. The elongated pattern is mainly concentrated in the center of the welded area. The grooving corrosion test and electrochemical polarization test were conducted to study the corrosion behavior of the given materials. A V-shaped corrosion groove was found at the center of the fusion zone in both the steel-A and steel-B ERW pipes, as the corrosion rate of the bondlines is higher than that of the base metal. Furthermore, the higher volume fraction of pearlite at the bondline was responsible for the higher corrosion rate at the bondline of both types of steel.

KCI후보

4증기발생기 전열관 틈새복합환경(Pb+S+Cl)에서 Alloy 690의 응력부식균열거동

저자 : 신정호 ( Jung-ho Shin ) , 임상엽 ( Sang-yeop Lim ) , 김동진 ( Dong-jin Kim )

발행기관 : 한국부식방식학회(구 한국부식학회) 간행물 : Corrosion Science and Technology 17권 3호 발행 연도 : 2018 페이지 : pp. 116-122 (7 pages)

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The secondary coolant of a nuclear power plant has small amounts of various impurities (S, Pb, and Cl, etc.) introduced during the initial construction, maintenance, and normal operation. While the concentration of impurities in the feed water is very low, the flow of the cooling water is restricted, so impurities can accumulate on the Top of Tubesheet (TTS). This environment is chemically very complicated and has a very wide range of pH from acidic to alkaline. In this study, the characteristics of the oxide and the mechanism of stress corrosion cracking (SCC) are investigated for Alloy 690 TT in alkaline solution containing Pb, Cl, and S. Reverse U-bend (RUB) specimens were used to evaluate the SCC resistance. The test solution comprises 3m NaCl + 500ppm Pb + 0.31m Na2SO4 + 0.45m NaOH. Experimental results show that Alloy 690 TT of the crevice environment containing Pb, S, and Cl has significant cracks, indicating that Alloy 690 is vulnerable to stress corrosion cracking under this environment.

KCI후보

5이온빔을 이용한 표면 미세구조 제어를 통한 발수 표면 제조

저자 : 김동현 ( Dong-hyeon Kim ) , 이동훈 ( Dong-hoon Lee )

발행기관 : 한국부식방식학회(구 한국부식학회) 간행물 : Corrosion Science and Technology 17권 3호 발행 연도 : 2018 페이지 : pp. 123-128 (6 pages)

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The fabrication of a controlled surface is of great interest because it can be applied to various engineering facilities due to the various properties of the surface, such as self-cleaning, anti-bio-fouling, anti-icing, anti-corrosion, and anti-sticking. Controlled surfaces with micro/nano structures were fabricated using an ion beam focused onto a polypropylene (PP) surface with a fluoridation process. We developed a facile method of fabricating hydrophobic surfaces through ion beam treatment with argon and oxygen ions. The fabrication of low surface energy materials can replace the current expensive and complex manufacturing process. The contact angles (CAs) of the sample surface were 106° and 108° degrees using argon and oxygen ions, respectively. X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared (FT-IR) spectroscopy were used to determine the chemical composition of the surface. The morphology change of the surfaces was observed by scanning electron microscopy (SEM). The change of the surface morphology using the ion beam was shown to be very effective and provide enhanced optical properties. It is therefore expected that the prepared surface with wear and corrosion resistance might have a considerable potential in large scale industrial applications.

KCI후보

6마이크로 드로플릿 셀 기법과 임계공식온도 측정 기법을 이용한 적층가공 Ti-6Al-4V 합금의 내식성 평가

저자 : 서동일 ( Dong-il Seo ) , 이재봉 ( Jae-bong Lee )

발행기관 : 한국부식방식학회(구 한국부식학회) 간행물 : Corrosion Science and Technology 17권 3호 발행 연도 : 2018 페이지 : pp. 129-137 (9 pages)

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The resistance to corrosion of additive manufactured (3D printing) Ti-6Al-4V alloys was investigated using micro-electrochemical tests. In terms of corrosion resistance, the acicular martensitic α' phase in such additive manufactured Ti-6Al-4V was the focus of attention, and its behavior was distinct from that of conventional subtractive manufactured Ti-6Al-4V. To order to identify α' phase, XRD tests were performed and micro Vickers hardness was measured for different grains (bright and dark grains) in the additive manufactured Ti-6Al-4V alloy. Micro-electrochemical tests were performed to measure corrosion resistance of bright and dark grains in the additive manufactured Ti-6Al-4V alloy with specially designed electrochemical micro-droplet cell. Critical pitting temperature (CPT) measurement was performed to evaluate the resistance to pitting corrosion of additive manufactured Ti-6Al-4V alloys with different volumes of α' phase and subtractive manufactured Ti-6Al-4V alloy. The dark grains of the laminated Ti-6Al-4V alloy distributed broader than the bright grains measured with low microhardness. The dark grains of the Ti-6Al-4V alloy, which was rich in martensite α ', had lower general corrosion and pitting resistance than bright grains. As the fraction of martensite α 'phase increased, the resistance to the pitting corrosion decreased.

KCI후보

7TiO2 나노튜브 형상에 미치는 NH4F와 H2O의 영향

저자 : 김건두 ( Geon-du Gim ) , 장상순 ( Sang-soon Jang ) , 김희산 ( Heesan Kim )

발행기관 : 한국부식방식학회(구 한국부식학회) 간행물 : Corrosion Science and Technology 17권 3호 발행 연도 : 2018 페이지 : pp. 138-145 (8 pages)

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The aim of this work is the attainment of the TiO2-nanotube photocatalytic-growth condition using anodization, whereby the NH4F-H2O weight ratio is appropriately controlled. We fabricated the TiO2 nanotubes using a two-step anodization (first step is 1 hr; second step is 30 hr) under the ambient pressure and the room temperature at 60 V in ethylene-glycol solutions to investigate the effects of the NH4F(0.1,0.3,0.5wt%) and H2O(1-3wt%) on the TiO2-nanotube geometry and the photocatalytic efficiency. Further, the decomposition efficiency of the methylene blue on the TiO2 nanotubes by the UN radiation depended on the geometrical change of the nanotube geometry, indicating the proportionality of the decomposition efficiency to the surface area that was affected by the NH4F and H2O concentrations. As the NH4F weight was increased, the surface area initially decreased but slightly increased later, and the length consistently increased. As the H2O weight was increased, the surface area and length initially increased, but later decreased with the 3 wt% H2O.

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