Corrosion Behavior of the Passivation 15-5PH Stainless Steel in a Sodium Chloride Medium and Sulfuric Acid

2017 ◽  
Vol 76 (1) ◽  
pp. 205-210
Author(s):  
María Lara ◽  
Octavio Covarrubias ◽  
Citlalli Gaona Tiburcio ◽  
Patricia Zambrano Robledo ◽  
José Angel Cabral ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Sulfuric Acid ◽  
Sodium Chloride ◽  
Corrosion Behavior ◽  
Chloride Medium

scholarly journals Corrosion Behavior of SUS 304 Stainless Steel in Sulfuric Acid-Cerium (IV) Solution

1988 ◽  
Vol 37 (2) ◽  
pp. 88-96 ◽  
Author(s):  
Takeshi Suwa ◽  
Nobuhide Kuribayashi ◽  
Enzo Tachikawa
Keyword(s):  
Stainless Steel ◽  
Sulfuric Acid ◽  
Corrosion Behavior ◽  
304 Stainless Steel

Prediction and Measurement of Corrosion Rates of Stainless Steel in Concentrated Sulfuric Acid

CORROSION ◽  
10.5006/0709 ◽  
2013 ◽  
Vol 69 (6) ◽  
pp. 543-550 ◽  
Author(s):  
S. Jones ◽  
K. Coley ◽  
J. Kish
Keyword(s):  
Stainless Steel ◽  
Sulfuric Acid ◽  
Corrosion Behavior ◽  
Electrochemical Behavior ◽  
Open Circuit Potential ◽  
Electrochemical Techniques ◽  
Open Circuit ◽  
Corrosion Rates ◽  
Transient Nature ◽  
Concentrated Sulfuric Acid

When exposed to concentrated sulfuric acid, stainless steel exhibits unique electrochemical behavior. This behavior can be observed as an oscillation in open-circuit potential between the active and passive states. The transient nature of the corrosion behavior under these conditions results in a distinct challenge for measuring and predicting corrosion rates. Using a series of commercial alloys with various nickel contents, this paper outlines the utilization of electrochemical experimentation to refine the prediction of corrosion rates. The paper also discusses some of the difficulties associated with many traditional electrochemical techniques such as potentiodynamic scans when used for characterizing systems that undergo oscillations in open-circuit potential.

scholarly journals Comparison of the corrosion behavior and surface morphology of NiTi alloy and stainless steels in sodium chloride solution

2016 ◽  
Vol 52 (1) ◽  
pp. 53-61 ◽  
Author(s):  
S. Kozuh ◽  
L. Vrsalovic ◽  
M. Gojic ◽  
S. Gudic ◽  
B. Kosec
Keyword(s):  
Stainless Steel ◽  
Sodium Chloride ◽  
Corrosion Behavior ◽  
Stainless Steels ◽  
Electrochemical Impedance ◽  
Layer Structure ◽  
Niti Alloy ◽  
Surface Film ◽  
Open Circuit ◽  
Aisi 316L

The corrosion behavior of NiTi alloy and stainless steels (AISI 316L and X2CrNiMoN22-5-3) in 0.9% sodium chloride (0.154 moll-1) solution was investigated using open circuit potential measurements, potentiodynamic polarization and electrochemical impedance spectroscopy measurements. Microstructural analyses before and after electrochemical tests were performed with the scanning electron microscopy (SEM) equipped with energy dispersive spectrometry (EDS). The lowest corrosion current density has NiTi alloy and the extent of the passive range increased in the order AISI 316L stainless steel < NiTi alloy < X2CrNiMoN22-5-3 duplex stainless steel. The oxide film formed on all samples has a double-layer structure consisting of a barrier-type inner layer and a porous outer layer. Oxide films formed on the surface of steels mainly contains iron oxides and chromium oxide, while the surface film of the NiTi alloy mainly contains TiO2 oxide.

The Effect of Sodium Chloride Concentration on Corrosion Resistance of Austenitic Stainless Steel 316L and SMA Weldment

2017 ◽  
Vol 263 ◽  
pp. 120-124
Author(s):  
Andi Rustandi ◽  
Suganta Setiawan ◽  
Ihsan Fathurrahman
Keyword(s):  
Stainless Steel ◽  
Sodium Chloride ◽  
Austenitic Stainless Steel ◽  
Weld Metal ◽  
Base Metal ◽  
Corrosion Behavior ◽  
Chloride Solution ◽  
Sodium Chloride Solution ◽  
Stainless Steel 316L ◽  
Impedance Magnitude

Austenitic stainless steel 316L has been widely used in marine environment which containing sodium chloride solution (NaCl). In order to provide matching properties with parent metal, filler metal SMA 316L is commonly produced with slightly over alloyed composition. This work investigated the corrosion behavior of base metal 316L and SMA 316L weld metal by using Electrochemical Impedance Spectroscopy (EIS) to evaluate the mechanism of corrosion behavior based on impedance magnitude measurement at room temperature (27°C ). Various concentrations of sodium chloride solution i.e 1%,2%,3.5%,4% ,and 5% NaCl were prepared. Optical Metallography was also conducted to compare microstructure of base and weld metal. By using Nyquist graphs and its related equivalent circuit parameters showed that impedance magnitude of weld metal was higher which compared to base metal at any NaCl concentration. Metallography examination revealed that weld metal 316L had dendritic austenitic with delta ferrite and 316L base metal had austenite with typical twin boundaries structure. Higher chromium and nickel content in weld metal 316L was the key variable that control passive film characteristic rather than its microstructure. The lowest impedance magnitude of both 316L and all-weld metal 316L at various concentration was at 3.5% NaCl. Dissolved oxygen at 3.5% NaCl reach maximum solubility which causes severe pitting corrosion.

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