Proposal of an Accelerated Test Method in Sulfur Corrosion of the Housing Structure Electronic Components Mounted in Engine Rooms

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  • エンジンルームに実装される筐体構造電子部品の硫黄腐食における加速試験方法の提案
  • エンジンルーム ニ ジッソウ サレル キョウタイ コウゾウ デンシ ブヒン ノ イオウ フショク ニ オケル カソク シケン ホウホウ ノ テイアン

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Abstract

The purpose of this investigation is to find a highly accelerated corrosion evaluation method which shorten the evaluate time of the corrosion resistance of electronic components having housing structures in which silver conductor formed circuit substrates are contained and are sealed with silicone. We applied three test conditions using three gaseous species such as SO2, H2S, and S8, respectively. We adopted in SO2 test(3300ppm/40℃/100%RH), H2S test(60ppm/40℃/100%RH) and S8 test(4ppm/90℃/<10%RH), respectively. As a results of the observations and analyses of the tested samples, it was found that the test using S8 showed the highest corrosion rate among those using three kind of gases. This high corrosion rate of S8 was estimated in conjunction with the higher permeability of S8 through silicone and corrosivity of S8 itself.

Journal

  • Zairyo-to-Kankyo

    Zairyo-to-Kankyo 65 (5), 193-196, 2016

    Japan Society of Corrosion Engineering

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