Corrosion. Anodic Polarization Behavior of Cr Carbide/Ni-Cr Composite Alloy.

1995 ◽  
Vol 44 (506) ◽  
pp. 1326-1331 ◽  
Author(s):  
Yasuyuki TAKATANI ◽  
Tomoki TOMITA ◽  
Kazumi TANI ◽  
Mitsuharu INABA ◽  
Yoshio HARADA
Keyword(s):  
Anodic Polarization ◽  
Composite Alloy ◽  
Polarization Behavior

Anodic Polarization Behavior of Cold Worked Austenitic Stainless Steel

2013 ◽  
Vol 794 ◽  
pp. 632-642 ◽  
Author(s):  
Narayanan Srinivasan ◽  
Ajay Kumar Revelly ◽  
Vivekanand Kain ◽  
Indradev Samajdar ◽  
Christopher R. Hutchinson ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Anodic Polarization ◽  
Room Temperature ◽  
Austenitic Stainless Steels ◽  
Selective Dissolution ◽  
Anodic Peak ◽  
Polarization Behavior ◽  
Sanicro 28 ◽  
Polarization Test ◽  
Cold Worked

The anodic polarization behavior of Sanicro 28 austenitic stainless steels has been established in the cold worked (10 to 80% reduction in thickness) samples in 1N HCl, 1M H2SO4+ 1.5N HCl and 3N HCl solutions at room temperature. The current oscillations during the potentiodynamic scans appeared in 3N HCl implying formation of meta stable pits and this solution more severe than 1N HCl and 1M H2SO4+ 1.5N HCl. Two anodic peaks were observed in as-received and the cold worked samples in 3N HCl. In as-received state, the first anodic peak appeared at-3.95 mVSCEand the second anodic peak appeared at 116 mVSCE. It was established that selective dissolution started from 18mVSCE. The grains and grain boundaries were not attacked at the beginning of the first peak-168 mVSCEand started revealing at 18 and 216 mVSCEin the potentiodynamic polarization test. The fore-scatter detector (FSD) attached to FEI Quanta EBSD revealed the pitting morphology of the specimens. It is shown that pit dimensions, types, distribution, the shape of pits in all deformation conditions is hemispherical and number of pits did not depend on the microstructural features, irrespective of the plastic deformation and it may not be related to severity of plastic deformation.

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