Abstract
In order to examine the influence of acidic rain on the CFRP for outdoor use, three kinds of CFRP were immersed in an acidic water of pH 3 at various temperatures for different immersion durations. The weight gain and interlaminar shear strength (ILSS) were measured. The progress of deterioration was about the same or a little faster in an acidic water compared with that in a distilled water. Even if the matrix was the same, the degree of deterioration in ILSS varied among CFRPs containing different kinds of fibers. The apparent activation energy (ΔEa) for 50-75% deterioration of ILSS in an acidic water was 57-60kJ/mol, while that in a distilled water was 41-62kJ/mol.
