硫酸液滴の付着量が純鉄表面の腐食挙動に及ぼす影響

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  • Influence of Droplet Volume of Sulfuric Acid Solution on Corrosion Behavior of Pure Iron
  • リュウサン エキテキ ノ フチャクリョウ ガ ジュンテツ ヒョウメン ノ フショク キョドウ ニ オヨボス エイキョウ

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  The volume influence of aqueous sulfuric acid solution on the corrosion rate of pure iron during the initial 0.6ks was investigated by potentiostat, digital microscope and atomic force microscope (AFM). Three types of solution volume on the specimen, bulk solution, macro-droplet with millimeter size and micro-droplet with micrometer size, were used.<br>    A micro-droplet with diameter of 1~10 μm can be produced on a pre-assigned target micro-zone of specimen by the cantilever tip of AFM. The corrosion behavior by the droplet can be investigated using both the contact mode and the AC non-contact mode of AFM. The corrosion rate in bulk solution was much higher than that in a micro-droplet of sulfuric acid solution. In the case of corrosion on pure iron surface caused by a micro-droplet, the corrosion rate was smaller for the smaller droplet. The solidification of the micro-droplet in 25-30%RH condition is faster than that in 50-70%RH condition.<br>

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  • 日本金属学会誌

    日本金属学会誌 70 (11), 929-935, 2006

    公益社団法人 日本金属学会

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