腐食疲労試験に於ける塗膜の特性

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There occur internal residual strains in paint films due to shrinkage caused by the evaporation of solvent during the drying and hardening process of paint. These internal strains cause paint film cracking or film repeling damages. So it is necessary to make clear the internal strains in paint films in order to design and evaluate the performance of paint coatings. Authors are studying the characteristics of paint films which have internal residual strains, the measurement methods of residual strains, and the deterioration behaviors in paint films under corrosion fatigue test. We investigated residual strains in paint films during the hardening process and after cured process. Also we showed the deterioration behaviors in paint films under corrosion fatigue test. We measured residual strains using strain gauges on the surface and the middle layer of paint film. Obtained results are summarized below: 1. Internal residual strains of paint films are chainging during cured process and the changes are influenced sensiblely by temperature. 2. Internal residual strains of thick paint films are not so large than those of thin paint films. 3. Strain gauges of long gauge length, large gauge area and with thin base film are suitable for the strain measurement in paint film. 4. The deterioration behaviors in paint films are found in the area of strain/displacement hysteresis loop during the corrosion fatigue test.
社団法人日本船舶海洋工学会の論文
2000-03-29

腐食疲労試験に於ける塗膜の特性

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