Influence of strain-induced martensite in the anodic dissolution of austenitic stainless steels in acid medium Articles uri icon

publication date

  • April 2013

start page

  • 130

end page

  • 138

issue

  • Abril

volume

  • 69

international standard serial number (ISSN)

  • 0010-938X

electronic international standard serial number (EISSN)

  • 1879-0496

abstract

  • The anodic dissolution of austenitic stainless steel bars in an acid medium (0.5 M HCl + 2 M H(2)SO4) under different polarizations is studied. The material comes from bars formed by hot working (HW) and by cold working (CW). UNS S30403 and S31603 grades are considered. The determining effect of alloying elements and working method are proved. The morphology of the attack at different anodic potentials is analyzed. The important influence of the amount and distribution of strain-induced martensite on corrosion is demonstrated. The effect of the martensite on the anodic polarization curves is quantified using specifically designed software.

keywords

  • stainless steel; electrochemical calculation; polarization ; potentiostatic; sem; acid corrosion