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 SO
2, H
2S, and S
8, respectively. We adopted in SO
2 test(3300ppm/40℃/100%RH), H
2S test(60ppm/40℃/100%RH) and S
8 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 S
8 showed the highest corrosion rate among those using three kind of gases. This high corrosion rate of S
8 was estimated in conjunction with the higher permeability of S
8 through silicone and corrosivity of S
8 itself.
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