• Title/Summary/Keyword: paint

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Development of the Inorganic Paint Using Clay-Titania Carrier and the Removal Property of Air Pollutant (점토와 광촉매를 이용한 무기도료의 개발과 대기정화성능에 관한 특성 연구)

  • Kim, Wha-Jung;Lee, Jun-Cheol;Chai, Han-Sik
    • Proceedings of the Korea Concrete Institute Conference
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    • 2005.11a
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    • pp.655-658
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    • 2005
  • In the domestic atmosphere environment, the VOCs and the NOx have a large proportion of the pollutant, and the HCHO is the main environmental pollutant factor within the house. In this study, the inorganic paint which can absorb and remove VOCs, NOx and HCHO is developed by using clay-titania carrier. The basic data to develope eco-friendly inorganic paint is collected with the performance test to remove the VOCs, NOx and HCHO in the condition of the addition of several inorganic materials to the paint, and also the plan to practical use of eco-friendly inorganic paint is studied.

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Effect of Fluoride Conversion Coating on the Corrosion Resistance and Adhesion of E-painted AZ31 Magnesium Alloy

  • Fazal, Basit Raza;Moon, Sungmo
    • Journal of the Korean institute of surface engineering
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    • v.49 no.5
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    • pp.395-400
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    • 2016
  • This article reports improved corrosion resistance and adhesion of electro-paint (E-paint) with fluoride conversion coating (FCC) on AZ31 Mg alloy for the first time. These improvements were observed in comparison to chemically polished samples with no chemical conversion coating and samples with cerium conversion coatings (CeCC). FCCs were prepared in a hydrofluoric acid (HF) solution for four different times; 10, 30, 60, and 120 s. The colour of the samples changed from light gold to brown with increasing immersion time, indicating the formation of thicker FCC coatings with increasing immersion time. The adhesion of the E-paint on FCC-coated AZ31 Mg alloy was tested after 500 h of immersion in deionized (DI) water. Salt spray test (SST) results revealed delamination of E-paint on the chemically polished sample, severe blistering on the samples with CeCC, but no delamination and no blistering on the samples with FCC.

Corrosion and Adhesion of Electrophoretic Paint on AZ31 Magnesium Alloy Pretreated in Cerium Chemical Conversion Coating Solution

  • Phuong, Nguyen Van;Moon, Sungmo
    • Proceedings of the Korean Institute of Surface Engineering Conference
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    • 2015.11a
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    • pp.189-189
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    • 2015
  • In this study, the corrosion resistance and adhesion of electrophoretic paint (E-paint) were studied on AZ31 magnesium alloy pretreated in cerium chemical conversion coating solutions with the addition of various ethanol concentrations. It was found that with increasing ethanol concentration from 0 to 90 percent can decrease the formation of $Mg(OH)_2/MgO$ and increase the formation of nano-crystalline cerium oxides on the coating. Both corrosion resistance and adhesion of E-painted AZ31 increased with increasing ethanol concentration. The best E-paint sample was observed on the sample pretreatment in cerium chemical conversion coating solution with the addition of 80 percent of ethanol. This sample showed an excellent adhesion without paint detached after water immersion test for 500 h at $40^{\circ}C$, and only a few blisters observed at the near scratched sites after 1000 h salt-spray test.

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A study on the manufacture of polymer concrete using the waste paint (폐 페인트를 이용한 폴리머 콘크리트의 제조에 관한 연구)

  • 이창훈;박재읍;최진호;권진회;제우성;김성호
    • Composites Research
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    • v.17 no.2
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    • pp.21-27
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    • 2004
  • In this paper, the polymer concrete using the chemically treated waste paint and polystyrene foam was manufactured and their mechanical properties were evaluated. The compressive strength, specific gravity and water absorption with respect to the volume percents of the waste paint and resin were tested. From the tests, the specific gravities of the polymer concretes using the waste paint were lower than that of the conventional polymer concrete and it was recommended that they can be used for building exterior materials.

Study on concrete surface damage using hyper-spectral remote sensing

  • Nakajima, Takashi;Endo, Takahiro;Yasuoka, Yoshifumi
    • Proceedings of the KSRS Conference
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    • 2003.11a
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    • pp.1055-1057
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    • 2003
  • In this research, the concrete with paint film was classified using hyper-spectral remote sensing. First, spectral characteristics of concrete and concrete with some kinds of paint films were investigated with a spectrometer. Second, using reflectance and first order derivative, spectral characteristics of the normal concrete and the concrete with paint film were classified. By using hyper-spectral remote sensing, not only extraction of crack but also inspection of paint film distribution is possible.

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A study on the erosive wear of spray tip nozzle by epoxy primer paint impingement and the spraying characteristics (에폭시 프라이머 도료의 에어리스 스프레이 분사 시간에 따른 팁 노즐 침식마모경향과 분사특성 연구)

  • Kim, Jinuk;Cho, Yeon-Ho;Cheon, Je-Il;Han, Myoung-Soo
    • Corrosion Science and Technology
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    • v.14 no.2
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    • pp.59-63
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    • 2015
  • Airless spray which is widely used for painting to ship blocks and hull sides is the coating method for attaching atomized paint material to the substrate using spray tip nozzle with compressed air. When the paint material which has high solid contents such as epoxy primer paint is atomized by passing through spray tip nozzle with high pressure, the nozzle composed of tungsten carbide(WC) undergoes the erosive wear, leading to widening of nozzle hole. The deformation of nozzle hole induces improper spray pattern and coating failures such as finger pattern and sagging because the conditions of spray pump pressure and paint flow rate for developing full spray pattern are changed. In this study, an appropriate replacement cycle of spray tip was predicted by measuring the erosive wear tendency as increasing the spraying time of epoxy primer paint.

Development and Characterizations of Environment-friendly Lime Paint (친환경성 석회 도료의 개발 및 특성 연구)

  • Hwang, Dae-Ju;Kim, Ho-Sung;Lee, Seung-Kwan;Choi, Moon-Kwan;Kim, Hwan;Lee, Jong-Dae
    • Journal of the Korean Ceramic Society
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    • v.46 no.1
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    • pp.47-52
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    • 2009
  • Lime paint surpassing others in execution efficiency, anti-bacterial, anti-mold and small quantity emission of VOCs(Volatile Organic Compounds) characteristics was developed using a limestone as raw materials. The lime paint prepared by mixing slaked lime($37{\sim}40\;wt%$), PVA:EVA(9 wt%:1 wt%), talc(23 wt%), $TiO_2$(14 wt%), zeolite (3 wt%), antifoaming agent(5 wt%), wetting agent (5 wt%) was indicated over 99.8% of anti-bacterial and anti-mold characteristics. Also, the environment-friendly function of the lime paint was confirmed by detection of small amount of TVOCs($0.01\;mg/m^2h$) and formaldehyde($0.008\;mg/m^2h$). Execution efficiency, economy-and environment-friendly characteristics of this lime paint can make up for defects of established paints. And, it also presents the advantage of a limestone as high value added materials.

Construction of the Pressure Sensitive Paint System (PSP 압력측정 시스템의 구축)

  • Jeon, Young-Jin;Kim, Ki-Su;Seo, Hyung-Seok;Byun, Yung-Hwan;Lee, Jae-Woo
    • Journal of the Korean Society of Propulsion Engineers
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    • v.12 no.1
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    • pp.7-15
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    • 2008
  • Pressure Sensitive Paint(PSP) means a reacting paint in pressure. The calibration of PSP and the wind tunnel test of PSP painted model are required to measure pressure by using PSP. Therefore, the post processing from these results shows the information and image of the pressure distribution. PSP can show the information of total pressure from the wind tunnel test and the calibration. In this study, equipments of PSP are composed, and experiment is accomplished by using PSP. The surface pressure distribution around the wall of nozzle is measured by PSP. The measured pressure has similar results to those of the CFD and pressure tap measurement.

A Brief Review on Piezoelectrics-Based Paint Sensors (압전 기반 페인트 센서 기술 동향)

  • Hyoung-Su Han;Trang An Duong;Chang Won Ahn;Byeong Woo Kim;Jae-Shin Lee
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.36 no.5
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    • pp.433-441
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    • 2023
  • Piezoelectric ceramics play an important role in electrical and electronic devices such as sensors, actuators, and microelectronic devices. However, traditional ceramics are difficult to be used in various process industries due to their high brittleness and low flexibility. Therefore, piezoelectric paint sensors have been designed for application to the curved surfaces of complicated structures. Furthermore, recently, significant attention has been focused on the development of paint sensors that can be used as structure health monitoring sensors for vibration, impact, and acoustic emission. Several studies have successfully demonstrated the possibility that smart paint sensors can take the place of traditional ceramic sensors. In this review, we briefly introduce the concept of the piezoelectric paint sensors and the expected application field as well as their preparation and history.

Investigating the Antibacterial Qualities of Copper Particle-Infused UV-Curable Paint for Wood Flooring Boards (구리입자 기반 UV경화도료 코팅 목질 마루판의 항균 특성)

  • Lee, Dong-Gun;Lim, Nam-Gi;Koh, Jae-Song
    • Journal of the Korea Institute of Building Construction
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    • v.23 no.4
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    • pp.393-404
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    • 2023
  • This research evaluates the antibacterial and transparency properties of UV-curable paint augmented with 20wt% copper particles. The transparency assessment indicated that the paint maintained a total luminous transmittance of 90% or above, thereby matching or surpassing the performance of standard UV-curing paints. To further test its antibacterial capabilities, wooden flooring boards were coated with the UV-curable paint laced with 20wt% copper particles, which had been surface-modified with a silane coupling agent. Following the fatigue tests of these treated boards, an impressive bacterial reduction rate of 99.9% was noted after a span of 6 hours, demonstrating the paint's exceptional antibacterial performance.