간행물

한국부식방식학회> Corrosion Science and Technology

Corrosion Science and Technology update

  • : 한국부식방식학회
  • : 공학분야  >  금속공학
  • : KCI등재
  • : SCOPUS
  • : 연속간행물
  • : 격월
  • : 1598-6462
  • : 2288-6524
  • : 한국부식학회지(~2001)→Corrosion Science and Technology(2002~)

수록정보
수록범위 : 1권1호(2002)~20권4호(2021) |수록논문 수 : 869
Corrosion Science and Technology
20권4호(2021년 08월) 수록논문
최근 권호 논문
| | | |

KCI등재 SCOPUS

1Application of High Performance Coatings for Service Life Extension of Steel Bridge Coatings

저자 : Chan-young Lee

발행기관 : 한국부식방식학회 간행물 : Corrosion Science and Technology 20권 4호 발행 연도 : 2021 페이지 : pp. 169-174 (6 pages)

다운로드

(기관인증 필요)

초록보기

In this study, performance tests, a field evaluation, and a life cycle cost (LCC) analysis for high performance coating systems were conducted to prepare a plan to reduce the cost of maintenance coating and contribute to the service life extension of steel bridges by applying high performance coatings to steel bridges that will be constructed in the future. From the deterioration models based on the field evaluation for chlorinated rubber and urethane topcoat systems, which have been applied often, the mean service lives were derived as 20.8 and 26.6 years, respectively. For the other coating systems that have not been applied in practice, the coordination factors were differentially applied with evaluation items. The most durable coating system was predicted to be thermal spray coating (TSC) primer/epoxy intermediate coat/fluoride resin topcoat, with a predicted value as long as 42.2 years. The LCC analysis indicates that partial application of high performance coating, such as TSC and fluoride resin, to specific parts vulnerable to corrosion and ultraviolet ray (UV) is more advantageous than the use of general coating systems.

KCI등재 SCOPUS

2A Study on the Corrosion Behavior of Magnesium Alloy Sealed with Chemical Conversion Coating and Sol-gel Coating

저자 : Dong Uk Lee , Shivshankar Chaudhari , Seung Yong Choi , Myung Jun Moon , Min Young Shon

발행기관 : 한국부식방식학회 간행물 : Corrosion Science and Technology 20권 4호 발행 연도 : 2021 페이지 : pp. 175-182 (8 pages)

다운로드

(기관인증 필요)

초록보기

Magnesium alloy is limited in the industrial field because its standard electrode potential is -2.363 V vs. NHE (Normal Hydrogen Electrode) at 25 ℃. This high electrochemical activity causes magnesium to quickly corrode with oxygen in air; chemical conversion coating prevents corrosion but causes surface defects like cracks and pores. We have examined the anti-corrosion effect of sol-gel coating sealed on the defected conversion coating layer. Sol-gel coatings produced higher voltage current and smaller pore than the chemical conversion coating layer. The conversion coating on magnesium alloy AZ31 was prepared using phosphate-permanganate solution. The sol-gel coating was designed using trimethoxymethylsilane (MTMS) and (3-Glycidyloxypropyl) trimethoxysilane (GPTMS) as precursors, and aluminum acetylacetonate as a ring-opening agent. The thermal shock resistance was tested by exposing specimens at 140 ℃ in a convection oven; the results showed changes in the magnesium alloy AZ31 surface, such as oxidization and cracking. Scanning electron microscope (FE-SEM) analysis confirmed a sealed sol-gel coating layer on magnesium alloy AZ31. Electrochemical impedance spectroscopy (EIS) measured the differences in corrosion protection properties by sol-gel and conversion coatings in 0.35 wt% NaCl solution, and the potentiodynamic polarization test and confirmed conversion coating with the sol-gel coating show significantly improved resistance by crack sealing.

KCI등재 SCOPUS

3Electrochemical Characteristics of Synthesized Nb2O5-Li3VO4 Composites as Li Storage Materials

저자 : Youngmo Yang , Hyungeun Seo , Jae-hun Kim

발행기관 : 한국부식방식학회 간행물 : Corrosion Science and Technology 20권 4호 발행 연도 : 2021 페이지 : pp. 183-188 (6 pages)

다운로드

(기관인증 필요)

초록보기

The increasing demand for energy storage in mobile electronic devices and electric vehicles has emphasized the importance of electrochemical energy storage devices such as Li-ion batteries (LIBs) and supercapacitors. For reversible Li storage, alternative anode materials are actively being developed. In this study, we designed and fabricated an Nb2O5-Li3VO4 composite for use as an anode material in LIBs and hybrid supercapacitors. Nb2O5 powders were dissolved into a solution and the precursors were precipitated onto Li3VO4 through a simple, low-temperature hydrothermal reaction. The annealing process yielded an Nb2O5-Li3VO4 composite that was characterized by X-ray diffraction, electron microscopy, and X-ray photoelectron spectroscopy. Electrochemical tests revealed that the Nb2O5-Li3VO4 composite electrode demonstrated increased capacities of approximately 350 and 140 mAh g-1 at 0.1 and 5 C, respectively, were maintained up to 1000 cycles. The reversible capacity and rate capability of the composite electrode were enhanced compared to those of pure Nb2O5-based electrodes. These results can be attributed to the microstructure design of the synthesized composite material.

KCI등재 SCOPUS

4Failure Evaluation Plan of a Reactor Internal Components of a Decommissioned Plant

저자 : Seong Sik Hwang , Sung Woo Kim , Min Jae Choi , Sung Hwan Cho , Dong Jin Kim

발행기관 : 한국부식방식학회 간행물 : Corrosion Science and Technology 20권 4호 발행 연도 : 2021 페이지 : pp. 189-195 (7 pages)

다운로드

(기관인증 필요)

초록보기

A technology for designing and licensing a dedicated radiation shielding facility needs to be developed for safe and efficient operation an R&D center. Technology development is important for smooth operation of such facilities. Causes of damage to internal structures (such as baffle former bolt (BFB) of pressurized water reactor) of a nuclear power reactor should be analyzed along with prevention and countermeasures for similar cases of other plants. It is important to develop technologies that can comprehensively analyze various characteristics of internal structures of long term operated reactors. In high-temperature, high-pressure operating environment of nuclear power plants, cases of BFB cracks caused by irradiated assisted stress corrosion cracks (IASCC) have been reported overseas. The integrity of a reactor's internal structure has emerged as an important issue. Identifying the cause of the defect is requested by the Korean regulatory agency. It is also important to secure a foundation for testing technology to demonstrate the operating environment for medium-level irradiated testing materials. The demonstration testing facility can be used for research on material utilization of the plant, which might have highest fluence on the internal structure of a reactor globally.

KCI등재 SCOPUS

5자동차용 핫스탬핑 AlSi 도금중 Mg 첨가효과

저자 : 양원석 ( Wonseog Yang ) , 이재민 ( Jeamin Lee ) , 김창규 ( Changkyu Kim ) , 안승호 ( Seungho Ahn ) , Homero Castaneda

발행기관 : 한국부식방식학회 간행물 : Corrosion Science and Technology 20권 4호 발행 연도 : 2021 페이지 : pp. 196-203 (8 pages)

다운로드

(기관인증 필요)

초록보기

To improve corrosion resistance and reduce the hydrogen uptake of 22MnB5, up to 5% Mg was added to the AlSi coating of 22MnB5. After hot-stamping and electrocoating were done on the metallic-coated specimen, the surface characteristics of the steel, hydrogen uptake content, and corrosion resistance were examined by transmittance electron microscopy, thermal desorption spectrometry, cyclic corrosion testing, and electrochemical impedance spectroscopy. Mg was investigated as MgO on the surface layer after hotstamping while it existed as Mg2Si before hot-stamping. The total hydrogen content of 22MnB5 was decreased along with the Mg content. However, there was no difference at 0.2 wt% or more. When a small amount of Mg was added, the coating corrosion resistance was decreased, but when it was added at around 1.0 wt%, the greatest corrosion resistance increase was seen. However, when 3 wt% or more was added excessively, the corrosion resistance was decreased. MgO on the surface was considered to suppress H uptake by the AlSi melting solution and increase the barrier effect of the coating.

KCI등재 SCOPUS

6판형 열교환기 전열판의 부식 파손 분석

저자 : 송민지 ( Min Ji Song ) , 최가현 ( Gahyun Choi ) , 채호병 ( Hobyung Chae ) , 김우철 ( Woo Cheol Kim ) , 김희산 ( Heesan Kim ) , 김정구 ( Jung-gu Kim ) , 이수열 ( Soo Yeol Lee )

발행기관 : 한국부식방식학회 간행물 : Corrosion Science and Technology 20권 4호 발행 연도 : 2021 페이지 : pp. 204-209 (6 pages)

다운로드

(기관인증 필요)

초록보기

Corrosion failure analysis of the flow plate, which is one of the accessories of the plate heat exchanger in a district heating system, was performed. The flow plate is made of 316 stainless steel, and water at different temperatures in the flow plate exchanges heat in a non-contact manner. The flow plate samples in which water mixing issues occurred were collected. Corrosion-induced pits, oxides, and contaminants were observed at locations where two plates are regularly in contact. The EDS analysis of the surface oxides and contaminants revealed that they were composed of carbon, silicon, and magnesium, which came from chemical adhesives. The IC/ICP analyses showed that the concentration of chloride ions was 30 ~ 40 ppm, which was not sufficient to cause corrosion of stainless steel. In the crevice, a local decrease in dissolved oxygen occurs along with an increase in chloride ions, thus forming an acidic environment. These environments destroyed the passive film of stainless steel, resulting in pits. Moreover, contaminants formed a narrower gap between the two metal plates and inhibited the diffusion of ions, thereby accelerating crevice corrosion.

KCI등재 SCOPUS

7원자로 내부구조물 균열개시 민감도에 미치는 영향인자 고찰

저자 : 황성식 ( Seong Sik Hwang ) , 최민재 ( Min Jae Choi ) , 김성우 ( Sung Woo Kim ) , 김동진 ( Dong Jin Kim )

발행기관 : 한국부식방식학회 간행물 : Corrosion Science and Technology 20권 4호 발행 연도 : 2021 페이지 : pp. 210-229 (20 pages)

다운로드

(기관인증 필요)

초록보기

To safely operate domestic nuclear power plants approaching the end of their design life, the material degradation management strategy of the components is important. Among studies conducted to improve the soundness of nuclear reactor components, research methods for understanding the degradation of reactor internals and preparing management strategies were surveyed. Since the IGSCC (Intergranular Stress Corrosion Cracking) initiation and propagation process is associated with metal dissolution at the crack tip, crack initiation sensitivity was decreased in the hydrogenated water with decreased crack sensitivity but occurrence of small surface cracks increased. A stress of 50 to 55% of the yield strength of the irradiated materials was required to cause IASCC (Irradiation Assisted Stress Corrosion Cracking) failure at the end of the reactor operating life. In the threshold-stress analysis, IASCC cracks were not expected to occur until the end of life at a stress of less than 62% of the investigated yield strength, and the IASCC critical dose was determined to be 4 dpa (Displacement Per Atom). The stainless steel surface oxide was composed of an internal Cr-rich spinel oxide and an external Fe and Ni-rich oxide, regardless of the dose and applied strain level.

1
권호별 보기

내가 찾은 최근 검색어

최근 열람 자료

맞춤 논문

보관함

내 보관함
공유한 보관함

1:1문의

닫기