• Title/Summary/Keyword: cataphoretic electrocoat

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Steel Surface Uniformity Assesment Method for Electrocoating by Applying Low Current and Voltage (표면전류분석을 이용한 전착도막의 표면 균질성 평가)

  • Yang, Wonseog;Lee, Changyong;Jung, Yudong;Moon, Manbeen;Hwang, Woonsuk
    • Corrosion Science and Technology
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    • v.12 no.6
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    • pp.288-294
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    • 2013
  • When the automotive body enters an electrocoating tank while applying an electric current, its steel surface is exposed to a very low induced current. Consequently, surface defects of coating may arise if the steel surface has lack of electric uniformity due to local defects such as local oxide. In this study, we investigated the preceding assessment methods to evaluate steel susceptibility of the low induced current during electrocoating before mass production. Prior to general electrocoating, we applied low constant voltage such as 3V or low constant current densities such as $0.35mA/cm^2$ and $0.50mA/cm^2$. In result, we confirmed that such methods were efficient for assessing steel susceptibility of low induce current during electrocoating.