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Rev. Esc. Minas vol.66 número2

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Figure 1 A, B and C shows typical  polarization curves obtained for 304 and  316 SS at pH 0.6, 10 and 12, respectively
Fig. 2 and 3 are just typical examples of a  quite reproducible behavior: on the  aver-age, the presence of Mo increased the pit  potential about 50 mV for the ferritic and  more than 150 mV for the duplex grades.
Figure  5A  and  B  show  the  pits  formed  on  the  etched  surface  of  DIN  1.4362 and DIN 1.4462 after polarization  experiments  in  pH  10  solution,   respec-tively

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