Localized Corrosion Behavior of 6% Mo Super Austenitic ＆ 316L Stainless Steels in Low pH 3% NaCl Solution

材料科学技术（英文）, 2005, 21(4): 465-469.

^1, , ^2, , ^3, , ^4, , ^5,

1.Metallurgy Department, Atomic Energy Authority, Cairo, Egypt

2.Mechanical Engineering Department, AUC, Cairo, Egypt

3.Metallurgy Department, Atomic Energy Authority, Cairo, Egypt

4.European Neighbourhood and Partnership Instrument (ENPI), Cairo, Egypt

5.Metallurgy Department, Atomic Energy Authority, Cairo, Egypt

Localized Corrosion Behavior of 6% Mo Super Austenitic ＆ 316L Stainless Steels in Low pH 3% NaCl Solution

Keywords： Crevice corrosion

Electrochemical techniques were applied to study the crevice corrosion resistance of two types of stainless steel alloys namely, conventional 316L and 6% Mo super austenitic in acidified 3% NaCl solution at room temperature.Potentiodynamic results showed that 6% Mo alloy possessed a remarkable resistance to crevice corrosion compared with 316L alloy when they are tested in the same solution. The breakdown potential at which passivity broke down for 316L alloy was 0.00 mV (SCE). The corresponding value for 6% Mo alloy could not reach up to the potential value of 700 mV (SCE). 316L alloy suffered extremely from crevice corrosion at room temperature (about 25℃), which indicates that the critical crevice corrosion temperature, below which crevice corrosion does not occur, was lower than the test temperature. For 6% Mo alloy, the critical crevice corrosion temperature was higher than the testing temperature. Electrochemical parameters indicated that 6% Mo alloy exhibited higher crevice corrosion resistance than 316L alloy.

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Localized Corrosion Behavior of 6% Mo Super Austenitic ＆ 316L Stainless Steels in Low pH 3% NaCl Solution

参考文献