• Title/Summary/Keyword: water corrosion

Search Result 1,466, Processing Time 0.033 seconds

An Experimental Study on the Permeability Evaluation of Metal Spray System by Metal Spray Coating Surface Treatment (콘크리트 표면처리방법에 따른 금속용사 피막의 투수성 평가에 관한 실험적 연구)

  • Park, Jin-Ho;Jang, Hyun-O;Lee, Han-Seung
    • Proceedings of the Korean Institute of Building Construction Conference
    • /
    • 2016.10a
    • /
    • pp.50-51
    • /
    • 2016

  • Ozone is a strong oxidizing materials in the advanced water treatment facilities. However, due to such a strong oxidation, Ozone eroded waterproofing/corrosion on the concrete surface and caused performance degradation. Therefore, in this study, permeability experiment of metal spraying system by concrete surface treatment was conducted.

  • PDF

Characteristic Analysis and Effect of Particulate Material in Drinking Water Distribution Networks (상수도관망에서 입자성 물질의 특성분석 및 영향조사)

  • Kim, Do-Hwan;Lee, Doo-Jin;Hwang, Jin-Su;Choi, Doo-Yong
    • Journal of Korean Society of Environmental Engineers
    • /
    • v.35 no.5
    • /
    • pp.312-320
    • /
    • 2013

  • Particulates in drinking water distribution system (DWDS) are mostly influenced by internal corrosion of metal pipes and sediment in pipelines due to the solution of this effect is limited. The particle size, component and properties of compounds for particulates in distributed water are different and the difference of these characteristics will be occurred by the kind of facilities, pipe condition, external factors and supply system etc. In this study, conducting the investigation of water quality in DWDS researches with particulates in the water. Monitoring sites were each water supply reservoir and the end of water supply area in DWDS. To collect particulate material at each sampling site, $47{\phi}$ glass microfiber filter type GF/C was performed using a filtration. Substances that the effect of the turbidity in the water according to particulate suspended solids and inorganic materials is due to the increasing particulates in the end of DWDS were increased. The result of compounds analysis by using X-ray diffraction (XRD) were Goethite (${\alpha}$-FeOOH), Magnetite ($Fe_3O_4$) in the end of DWDS and Quartz ($SiO_2$), Yeelimite ($Ca_4Al_6O_{12}SO_4$) at the effluent of waterworks and reservoirs. There were differences the compounds and sediments in the releasing or remaining water distribution facilities.

  • https://doi.org/10.4491/KSEE.2013.35.5.312 인용 PDF KSCI

The assessment of self cleaning velocity and optimal flushing velocity in water distribution system (상수관망의 자가세척 유속과 적정 플러싱 유속 평가)

  • Bae, Cheol-Ho;Choi, Doo Yong;Kim, Ju-Hwan;Kim, Do-Hwan
    • Journal of Korean Society of Water and Wastewater
    • /
    • v.28 no.4
    • /
    • pp.441-451
    • /
    • 2014

  • The flushing is important to maintain good water quality in water main. It is a technique of using water velocity to remove sediments in water distribution system. The variety of water quality problems can occur in a distribution system, so too can a variety of benefits be gained by system flushing. In order to effectively perform the flushing, the contaminants to be removed to set up and it can be solved, it is necessary to ensure the proper flow rate. In this study, the removal of contaminants present in the inner water pipe attached loose deposits such as fine particles of granular activated carbon, sand and iron corrosion product sought to derive flow rates. Thus, the constant observation of using pilot plant scale water distribution plant for the movement of floating characteristics of particles were assessed.

  • https://doi.org/10.11001/jksww.2014.28.4.441 인용 PDF KSCI