Microstructure and Electrochemical Corrosion Behaviors of Laser‐Cladded 2205 Duplex Stainless Steel

2020 ◽  
Vol 91 (6) ◽  
pp. 1900456
Author(s):  
Erju Liu ◽  
Feifei Huang ◽  
Feihu Bao ◽  
Yanpeng Xue ◽  
Huimin Wang ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Electrochemical Corrosion ◽  
2205 Duplex Stainless Steel ◽  
Corrosion Behaviors

scholarly journals Electrochemical Corrosion Behavior of Laser Welded 2205 Duplex Stainless-Steel in Artificial Seawater Environment under Different Acidity and Alkalinity Conditions

Crystals ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1025 ◽  
Author(s):  
Hany S. Abdo ◽  
Asiful H. Seikh ◽  
Ubair Abdus Samad ◽  
Ahmed Fouly ◽  
Jabair Ali Mohammed
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Corrosion Behavior ◽  
Ph Value ◽  
Electrochemical Corrosion ◽  
Artificial Seawater ◽  
Stainless Steel Sample ◽  
2205 Duplex Stainless Steel ◽  
Electrochemical Corrosion Behavior ◽  
Seawater Environment

The electrochemical corrosion behavior of laser welded 2205 duplex stainless-steel in artificial seawater environment (3.5% NaCl solutions) with different acidity and alkalinity conditions (different pH values) was investigated using different techniques. Namely, capacitance measurements (Mott–Schottky approach), electrochemical impedance spectroscopy and potentiodynamic polarization measurements. The formation of pitting corrosion on the exposure surfaces of the tested duplex stainless-steel samples was investigated and confirmed by characterizing the surface morphology using field emission scanning electron microscope (FE-SEM). Based on the obtained results, a proportional relation has been found between pH value of the solution medium and the generated film resistance due to the processes of charge transfer, which directly affecting the pitting formation and its specifications. Since the film layer composition created on the duplex stainless-steel surface is changes depending on the pH value, it was found that different bilayer structure type was generated according to the acidity or alkalinity level. The presented bilayer is almost composed from metal oxides, such as iron oxide and chromium oxide, as confirmed by Raman Spectroscopy technique. As the pits size and its quantity increased with decreasing pH value, it can be concluded that the corrosion resistance property of the laser welded 2205 duplex stainless-steel sample is improved on the alkalinity direction of the solution. Vice versa, higher acidic solution has more ability for corrosion.

Evaluating the Hydrogen Embrittlement Susceptibility of Aged 2205 Duplex Stainless Steel Containing Brittle Sigma Phase

2021 ◽  
Author(s):  
Loyslene Rabelo Fernandes ◽  
Lisa Claeys ◽  
Margot Pinson ◽  
Tom Depover ◽  
Dagoberto Brandão Santos ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Hydrogen Embrittlement ◽  
Duplex Stainless Steel ◽  
Sigma Phase ◽  
2205 Duplex Stainless Steel
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