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《Corrosion & Protection》 2009-08
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Influence of SO_4~(2-) Content on Corrosion Behavior of X70 Steel in Yellow Pebble Soil

FEI Xiao-dan1,2,LI Ming-qi2,CAI Duo-chang2(1.South West University of Science and Technology,Mianyang 621010,China;2.China West Normal University,Nanchong 637002,China)  
Influence of SO2-4 content on corrosion behavior of X70 steel in yellow pebble soil was studied by means of polarization curves,EIS and SEM.The results showed that with the increase of SO2-4 content,Ecorr shifted negatively and icorr increased.The Nyquist diagram was composed of two capacitive arcs.The radius of the arc became smaller with the increase of SO2-4 content.X70 steel in soil with 0.5% SO2-4 suffered severe pitting corrosion.
【Fund】: 四川省科技厅重点资助项目(O4JY029-100)
【CateGory Index】: TG172.4
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