Corrosion Behavior of Alumina or Silicon Carbide Filled Epoxy Resin Immersed in Alkaline Solution

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  • SEMBOKUYA Hideki
    Department of Chemical Engineering, Graduate School of Science and Engineering, Tokyo Institute of Technology
  • KUBOUCHI Masatoshi
    Department of Chemical Engineering, Graduate School of Science and Engineering, Tokyo Institute of Technology
  • OSHIDA Yoshitaka
    Department of Chemical Engineering, Graduate School of Science and Engineering, Tokyo Institute of Technology
  • TSUDA Ken
    Department of Chemical Engineering, Graduate School of Science and Engineering, Tokyo Institute of Technology

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Other Title
  • アルミナおよび炭化ケイ素粒子充てんエポキシ樹脂のアルカリ水溶液中での腐食
  • アルミナ オヨビ タンカ ケイ ソリュウシ ジュウテン エポキシ ジュシ ノ アルカリ スイヨウエキ チュウ デ ノ フショク

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Description

A bisphenol A type epoxy resin filled with alumina or silicon carbide (SiC) particles was immersed in an alkaline solution for obtaining the information on their corrosion behavior. Both the alumina/epoxy and SiC/epoxy gradually resolved into the solution from their surfaces. The higher the filler content, the lower was the degree of retention in the flexural strength for the alumina/epoxy. In the SiC/epoxy, the flexural strength decreased remarkably above a specific level of SiC content. The corrosion depth increased linearly with immersion time for the both composites. The higher the filler content and the concentration of alkaline solution, the larger was the corrosion rate. An equation on relationship between the corrosion rate and the filler content (the filler volume fraction) was proposed in consideration of the corrosion promoting effect of the filler particles.

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