ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The passive-active transition behavior of a 304 stainless steel was investigated byobserving the self-activation behavior and nano-scale galvanostatic cathodic reduction experiment.The self-activation time, τ0 was dependent remarkably on concentration of sulfuric acid. It wasappeared that applied nano-scale cathodic current density dissolved the passive film on a 304 stainlesssteel surface and shortened the activation time in galvanostatic cathodic reduction experiments. Theapplied cathodic current density was proportional to the reciprocal of activation time. From this linearrelationship, the rate of the self-activation process, i0 was obtained. The i0 increased with increasingH2SO4 concentration. And i0 also increased with increasing passivation potential and passivation time.The stability of passive film increased in accordance with increasing τ0 and decreasing i0. Therefore, itwas concluded that the stability of passive film on austenitic stainless steel is evaluated by the kineticparameters of the self-activation rate i0 and the self-activation time, τ0
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/15/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.544-545.423.pdf
