발간논문

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Vol.35, No.3, 346 ~ 351, 1997
Title
Research Paper - Environment : The Effect of Phosphorus on the Corrosion Behavior of Amorphous Fe - 8Cr - 13P - 7B Alloy Investigated by X-ray Photoelectron Spectroscopy and its Kinetics
임병모Byung mo Im, 조계현Kye Hyun Cho, 송상호Shang Ho Ahn, 교본공이Koji Hashimoto
Abstract
The corrosion rate of amorphous Fe-8Cr-13P-7B alloy is significantly low in comparison with that of Fe-8Cr-20B alloy, showing that the addition of phosphorus to the amorphous Fe-8Cr alloy is quite effective in increasing the corrosion resistance. Elemental phosphorus was accumulated on the alloy surface during the initial active dissolution. The formation of elemental phosphorus layer accelerates the cathodic reaction of hydrogen evolution and oxygen reduction and also suppresses the active current density. This leads to sharp ennoblement in the corrosion potential of Fe-8Cr-13P-7B alloy from the active state to the passive state with immersion time, while the corrosion potential of Fe-8Cr-20B alloy is unchanged.
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