Effect of Solution Temperature on the Cavitation Degradation Properties of Epoxy Coatings for Seawater Piping
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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 epoxycoated 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 temperatureon the cavitation degradation of epoxy coatings. Therefore, this work used an ultrasonic cavitationtester to focus on the effect of solution temperature on the cavitation properties of 3 kinds of epoxycoatings in 3.5% NaCl. The cavitation properties were discussed basis on the material properties and environmentalaspects. As the solution temperature increased, even though with large fluctuation, the cavitationdegradation rates of A and B coatings were reduced rapidly, but the rate of C coating was decreasedgradually. In addition to the cushioning effect, the reason that the cavitation degradation rate reduced withsolution 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 coatingsor the phase transition of the epoxy coating.
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 epoxycoated 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 temperatureon the cavitation degradation of epoxy coatings. Therefore, this work used an ultrasonic cavitationtester to focus on the effect of solution temperature on the cavitation properties of 3 kinds of epoxycoatings in 3.5% NaCl. The cavitation properties were discussed basis on the material properties and environmentalaspects. As the solution temperature increased, even though with large fluctuation, the cavitationdegradation rates of A and B coatings were reduced rapidly, but the rate of C coating was decreasedgradually. In addition to the cushioning effect, the reason that the cavitation degradation rate reduced withsolution 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 coatingsor the phase transition of the epoxy coating.
참고문헌 (26)
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