Chemical Composition of Passive Films on AISI 304 Stainless Steel

1994 ◽  
Vol 141 (12) ◽  
pp. 3347-3356 ◽  
Author(s):  
G. Lorang ◽  
M. Da Cunha Belo ◽  
A. M. P. Simões ◽  
M. G. S. Ferreira
Keyword(s):  
Stainless Steel ◽  
Chemical Composition ◽  
Passive Films ◽  
304 Stainless Steel ◽  
Aisi 304 Stainless Steel ◽  
Aisi 304

scholarly journals An Electrochemical Impedance Spectroscopic Study of the Passive State on AISI 304 Stainless Steel

2011 ◽  
Vol 2011 ◽  
pp. 1-8 ◽  
Author(s):  
A. Fattah-alhosseini ◽  
S. Taheri Shoja ◽  
B. Heydari Zebardast ◽  
P. Mohamadian Samim
Keyword(s):  
Stainless Steel ◽  
Acid Solution ◽  
Polarization Resistance ◽  
Electrochemical Impedance ◽  
Transport Processes ◽  
Passive Films ◽  
304 Stainless Steel ◽  
Aisi 304 Stainless Steel ◽  
Aisi 304 ◽  
Interfacial Impedance

The passivity and protective nature of the passive films are essentially related to ionic and electronic transport processes, which are controlled by the optical and electronic properties of passive films. In this study, the electrochemical behavior of passive films anodically formed on AISI 304 stainless steel in sulfuric acid solution has been examined using electrochemical impedance spectroscopy. AISI 304 in sulphuric acid solution is characterized by high interfacial impedance, thereby illustrating its high corrosion resistance. Results showed that the interfacial impedance and the polarization resistance () initially increase with applied potential, within the low potential passive. However, at a sufficiently high potential passive ( V), the interfacial impedance and the polarization resistance decrease with increasing potential. An electrical equivalent circuit based on the impedance analysis, which describes the behavior of the passive film on stainless steel more satisfactorily than the proposed models, is presented.

scholarly journals Corrosion Resistance of AISI 304 Stainless Steel Modified Both Femto- and Nanosecond Lasers

Coatings ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 592
Author(s):  
Katarzyna M. Mroczkowska ◽  
Paulina Dzienny ◽  
Aleksander Budnicki ◽  
Arkadiusz J. Antończak
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Surface Layer ◽  
Chemical Composition ◽  
Short Pulse ◽  
304 Stainless Steel ◽  
Aisi 304 Stainless Steel ◽  
Aisi 304 ◽  
Short Pulse Duration ◽  
Ultra Short Pulse

This article is aimed to study the effect of laser treatment of AISI 304 stainless steel on the corrosion resistance and chemical composition of the surface layer. The samples were irradiated using two quite different laser sources: IPG Yb:glass fibre laser (τ = 230 ns, λ = 1062 nm) and Trumpf TruMicro Series 2020 fiber laser (τ = 260 fs–20 ps, λ = 1030 nm) that is, in both the long and ultra-short pulse duration regime. It allowed the observation of completely different microstructures and chemical composition of the surface layer. In this study, the morphology of the samples was accessed using both Keyence digital microscope and Olympus Lext 5000 profilometer. The corrosion resistance was examined in 3% NaCl solution using both potentiodynamic measurement and Electrochemical Impedance Spectroscopy. In order to examine the change in chemical composition of the surface layer, the X-ray photoelectron spectroscopy study was performed. Results show that the use of a long laser pulse contributes to the formation of a thin, tight, rich in chromium passive layer, which significantly improves corrosion resistance in comparison to the reference sample. Different behaviour is observed after irradiation with an ultra-short pulse duration laser.

EIS study on passive films of AISI 304 stainless steel in oxygenous sulfuric acid solution

2009 ◽  
Vol 41 (6) ◽  
pp. 531-539 ◽  
Author(s):  
Weiya Lai ◽  
Wenzhen Zhao ◽  
Feng Wang ◽  
Chengzhu Qi ◽  
Jun Zhang
Keyword(s):  
Stainless Steel ◽  
Sulfuric Acid ◽  
Acid Solution ◽  
Sulfuric Acid Solution ◽  
Passive Films ◽  
304 Stainless Steel ◽  
Aisi 304 Stainless Steel ◽  
Aisi 304
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