Influence of uv light on passive behavior of the 304 stainless steel in acid solution

2013 ◽  
Vol 74 (5) ◽  
pp. 691-697 ◽  
Author(s):  
H. Luo ◽  
X.G. Li ◽  
C.F. Dong ◽  
K. Xiao ◽  
X.Q. Cheng
Keyword(s):  
Stainless Steel ◽  
Acid Solution ◽  
Uv Light ◽  
304 Stainless Steel ◽  
Passive Behavior

Anticorrosion Behaviours of the TiO2 / WO3 Composite Photoelectrodes for 304 Stainless Steel

2007 ◽  
Vol 336-338 ◽  
pp. 2203-2206 ◽  
Author(s):  
Hong Yi Li ◽  
Yun Han Ling ◽  
Bo Jiang ◽  
Wu Feng Jiang ◽  
Zhi Hong Guo ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Uv Light ◽  
Composite Coatings ◽  
Dip Coating ◽  
Absorption Efficiency ◽  
High Reactivity ◽  
Open Circuit ◽  
304 Stainless Steel ◽  
Light Illumination ◽  
Coating Method

TiO2 is one kind of semiconductor-based photocatalyst. TiO2 shows relatively high reactivity and chemical stability under ultraviolet (UV) light. However TiO2 is a poor absorber of photons in visible light. In order to improve the absorption efficiency, the coatings of TiO2/WO3, WO3 and TiO2 on ITO were prepared by liquid phase deposition (LPD) and dip coating method, their microstructure, surface properties, photoelectrochemical properties are investigated in this paper. XRD results showed that the phases on the composite coatings are mainly anatase, rutile and WO3 respectively, the SEM results showed that the coatings of TiO2 and TiO2/WO3 are distributed evenly on the materials surface. The electrochemical experiment results showed that open circuit potential of TiO2 and TiO2/WO3 with presence of the UV light illumination were about -343 mV and –650 mV respectively, comparatively the rest potential of 304 stainless steel is about 48 mV, which means that the TiO2 or TiO2/WO3 coatings can protect 304 stainless steel from corrosion, and TiO2/WO3 coatings retained for a while anticorrosion even absence of UV light.

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.

Effect of benzotriazole on electrochemical and corrosion behaviour of type 304 stainless steel in 2M sulphuric acid solution

1996 ◽  
Vol 31 (4) ◽  
pp. 305-308 ◽  
Author(s):  
P. R. P. RODRIGUES ◽  
I. V.AOKI ◽  
A. H. P. DE ANDRADE ◽  
E. DE OLIVEIRA ◽  
S. M. L. AGOSTINHO
Keyword(s):  
Stainless Steel ◽  
Acid Solution ◽  
Sulphuric Acid ◽  
Corrosion Behaviour ◽  
Sulphuric Acid Solution ◽  
304 Stainless Steel ◽  
Type 304 ◽  
Type 304 Stainless Steel
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