Corrosion Science and Technology

The Corrosion Science Society of Korea (한국부식방식학회)
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Effect of Solution Temperature on the Cavitation Degradation Properties of Epoxy Coatings for Seawater Piping

  • Jeon, J.M. (Materials Research Centre for Energy and Clean Technology, School of Materials Science and Engineering, Andong National University) ;
  • Yoo, Y.R. (Materials Research Centre for Energy and Clean Technology, School of Materials Science and Engineering, Andong National University) ;
  • Jeong, M.J. (Materials Research Centre for Energy and Clean Technology, School of Materials Science and Engineering, Andong National University) ;
  • Kim, Y.C. (Materials Research Centre for Energy and Clean Technology, School of Materials Science and Engineering, Andong National University) ;
  • Kim, Y.S. (Materials Research Centre for Energy and Clean Technology, School of Materials Science and Engineering, Andong National University)
  • Received : 2021.11.24
  • Accepted : 2021.12.15
  • Published : 2021.12.31
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Abstract

Since epoxy resin coating shows excellent properties in formability, adhesion, and corrosion resistance, they have been extensively used in many industries. However, various types of damages in the epoxy coated tube within a relative short time have been reported due to cavitation erosion, liquid impingement, variation of temperature and pressure. Nevertheless, there has been little research on the effect of temperature on the cavitation degradation of epoxy coatings. Therefore, this work used an ultrasonic cavitation tester to focus on the effect of solution temperature on the cavitation properties of 3 kinds of epoxy coatings in 3.5% NaCl. The cavitation properties were discussed basis on the material properties and environmental aspects. As the solution temperature increased, even though with large fluctuation, the cavitation degradation rates of A and B coatings were reduced rapidly, but the rate of C coating was decreased gradually. In addition to the cushioning effect, the reason that the cavitation degradation rate reduced with solution temperature was partly related to the brittle fracture and water absorptivity of the epoxy coatings, and the water density, but was little related to the shape and composition of the compound in the coatings or the phase transition of the epoxy coating.

Keywords

Acknowledgement

This work was supported by KOREA HYDRO & NUCLEAR POWER CO., LTD (No. 2019-Technical-08).

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