발간논문

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Vol.21, No.1, 25 ~ 29, 1983
Title
Crevice Corrosion of Ti - 0.2 % Pd Alloy and Pure Ti
안성태Sung Tae Ahn, 김광범Kwang Bum Kim, 윤용구Young Ku Yoon
Abstract
Crevice corrosion properties of Ti-0.2 wt.% Pd alloy and pure Ti in hot 6% NaCl solution were investigated. Pure Ti specimens exhibited severe corrosion, while Ti-0.2% Pd alloy specimens were virtually immune to crevice corrosion in an accelerated test. An electrochemical polarization technique was used to determine the effect of Pd-addition to Ti. It was found that Ti-0.2% Pd alloy retained passivity in an acid solution of the same concentration developed in the crevice. This result indicates that Pd acts as a cathodic depolarizer to shift the potential of Ti in the noble direction. It is therefore concluded that small addition, namely, 0.2% of Pd effectively improves the resistance of Ti to crevice corrosion in a hot brine.
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