Corrosion resistance of plasma nitrided austenitic stainless steel AISI 304 (X5CrNi18-10)

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60162694%3AG43__%2F20%3A00556630" target="_blank" >RIV/60162694:G43__/20:00556630 - isvavai.cz</a>
Result on the web
<a href="http://ecst.ecsdl.org/" target="_blank" >http://ecst.ecsdl.org/</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1149/09901.0231ecst" target="_blank" >10.1149/09901.0231ecst</a>

Result language
angličtina
Original language name
Corrosion resistance of plasma nitrided austenitic stainless steel AISI 304 (X5CrNi18-10)
Original language description
In this paper, austenitic stainless steel AISI 304 (X5CrNi 18-10) has been subjected to low-temperature plasma nitriding (LTPN) at 400 ∘C (673 K) in 24H2:8N2 (l/h), and in 8H2:24N2 (l/h) marked as LTPN-R, and to high-temperature plasma nitriding (HTPN) at 550 ∘C (823 K) in 24H2:8N2 (l/h) working atmosphere, for 15h. The microstructure, microhardness, and phase evaluation of the nitrided steel were studied. The PN led to significant microhardness increase from 206 ± 3 HV0.05 to 842 ± 27 HV0.05 (LTPN), 821 ± 18 HV0.05 (LTPN-R), resp. to 1246 ± 27 HV0.05 (HTPN). The corrosion properties were evaluated using the anodic potentiodynamic polarization tests in neutral 2.5% NaCl deaerated solution. The corrosion rate CR (mm.a) increased only slightly for LTPN procedures. But using the HTPN increased 43-times to untreated steel, due to reduced passivation ability by chromium depletion by formed CrN. Additionally, the pitting was evaluated, and the pitting coefficient was calculated.
Czech name
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Czech description
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Project
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Continuities
S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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