Paper number 1055

ACID STRESS CORROSION OF E AND C GLASS HYBRID COMPOSITES

Machiko MAEDA^*, Hiroyuki HAMADA^*, Yoshimichi FUJII^**

*Kyoto Institute of Technology
Matsugasaki, Sakyo, 606-8585 Kyoto JAPAN
**Seikow Chemical Engineering & Machinery, Ltd.
3-1-16 Shioe, Amagasaki, 661-0976 Hyogo, JAPAN

Summary

Acid stress corrosion of GFRP is related to the corrosion of reinforcement. In this study, two types of glass fiber were used; one was E glass corroded in acid and another was C glass. E glass, C glass, and hybrid of E and C glass laminates were tested in acid environments. AE was monitored during creep test. Each specimens showed difference in the AE response. AE activity of E glass and hybrid specimen increased, however AE activity of C glass specimen did not change. Furthermore, C glass and hybrid specimens had longer lifetime than E glass specimen. It was cleared that types of glass fiber greatly affected the lifetime of GFRP laminates. From SEM observation, the fracture surfaces divided into two patterns, one was typical fracture surface of acid stress corrosion and another was the surface which suggested that only interface damaged.

Keywords

GFRP laminates, acoustic emission, environmental creep, E glass C glass.