| "Epoxy resin and its composites are widely applied in linings, coatings and structural materials as corrosion resistant materials. It is required to establish a health monitoring technology for these structures damaged by chemical environment. In this study, a new on-line health monitoring technology for the determination of the penetration of environment solution into epoxy resin was pursued. A corrosion sensor including plastic optical fiber and pH indicator was fabricated. The color-changed layer of this sensor appeared after immersion in sulfuric acid solution, which could be examined by using optical fiber and spectrophotometer. The results showed that penetration of sulfuric acid was detected by adding bromphenol blue (BPB). This system could be applied to on-line health monitoring of chemical equipment structures." |
