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Study on the corrosion resistance of coating mixture to acid for the desulfurization system

  • Journal of the Korean Crystal Growth and Crystal Technology
  • Abbr : J. Korean Cryst. Growth Cryst. Technol.
  • 2006, 16(6), pp.278-285
  • Publisher : The Korea Association Of Crystal Growth, Inc.
  • Research Area : Engineering > Materials Science and Engineering

Kim In Ki 1 Yoo Jeong Kun 1

1한서대학교

Accredited

ABSTRACT

Coating mixtures of the resin B-H for the application to the desulfurization system of power plant were coated on carbon steels and cured at the temperature of 65oC~80oC. After being contacted with 70 wt% H2SO4 solution of 100oC and 120oC for several hours, their composition, Vicker뭩 hardness and microstructures by SEM were examined. Corrosion resistance of the coating mixtures to H2SO4 solution was related to the content of SO3 in the coated specimens after corrosion test. The lower curing temperature and the shorter curing time the coated specimens went through, the higher corrosion resistance to acid they showed, but the more cracks were developed at higher temperature. It was realized that the corrosion resistance to sulfaric acid solution was increased on the condition of curing temperature above 65oC and curing time above 12 hours at least.

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