scholarly journals Investigation of Influence of Surface Roughness on Pitting Corrosion of Duplex Stainless Steel 2205 using Various Electrochemical Techniques

2019 ◽  
pp. 6790-6813
Author(s):  
Yiwei Tang ◽  
Keyword(s):  
Surface Roughness ◽  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Pitting Corrosion ◽  
Electrochemical Techniques

Inhibition effect of chromate on the passivation and pitting corrosion of a duplex stainless steel in LiBr solutions using electrochemical techniques

2007 ◽  
Vol 49 (8) ◽  
pp. 3200-3225 ◽  
Author(s):  
A. Igual Muñoz ◽  
J. García Antón ◽  
J.L. Guiñón ◽  
V. Pérez Herranz
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Pitting Corrosion ◽  
Electrochemical Techniques ◽  
Inhibition Effect

scholarly journals Effect of Surface Roughness on Pitting Corrosion of 2205 Duplex Stainless Steel Investigated by Electrochemical Noise Measurements

Materials ◽  
2019 ◽  
Vol 12 (5) ◽  
pp. 738 ◽  
Author(s):  
Yiwei Tang ◽  
Nianwei Dai ◽  
Jun Wu ◽  
Yiming Jiang ◽  
Jin Li
Keyword(s):  
Surface Roughness ◽  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Pitting Corrosion ◽  
Electrochemical Noise ◽  
Corrosion Behaviour ◽  
Surface Condition ◽  
2205 Duplex Stainless Steel ◽  
Noise Measurements ◽  
Pit Initiation

The influence of surface roughness on the pitting corrosion behaviour of 2205 duplex stainless steel (DSS) in a chloride-containing environment was investigated using electrochemical noise (EN) techniques and morphology observation. A rougher surface condition increased the frequency of pit initiation because of the increase in more occluded pit sites. Rough surface finish also accelerated pit growth by increasing the actual dissolution rate in the pit. Metastable pits on rougher surfaces had longer lifetimes and grew to larger sizes, as their inner chemical environment was more easily maintained. However back-scatter images showed that pitting initiates on DSS 2205 regardless of the roughness condition.

Macro and Micro Electrochemical Techniques to Study Influence of Sigma Phase Formation in a Duplex Stainless Steel

2013 ◽  
Vol 794 ◽  
pp. 583-591 ◽  
Author(s):  
B. Sunil Kumar ◽  
Vivekanand Kain
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Pitting Corrosion ◽  
Potentiodynamic Polarization ◽  
Sigma Phase ◽  
Electrochemical Techniques ◽  
Chloride Ion ◽  
Heat Treatments ◽  
Localized Corrosion ◽  
Chromium Depletion

In the present study macro electrochemical (anodic polarization) and micro electrochemical (scanning electrochemical microscopy (SECM) area scan measurements at passive potential) techniques have been used to study the influence of sigma phase and/or the resultant chromium depletion regions on localized corrosion behavior of aged type 2205 duplex stainless steel (DSS) in neutral chloride ion solution. DSS type 2205 was subjected to aging at 750 °C for 30 min, 10 h and 48 h. The formation and growth of the sigma phase with heat treatments was assessed by optical microscopy, scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction. The influence of formation of sub-microscopic and bulky sigma phase on intergranular corrosion (IGC) and pitting corrosion was investigated by various electrochemical techniques including electrochemical potentiokinetic reactivation (EPR), potentiodynamic polarization and SECM. Apart from EPR tests, ASTM A 262 Practice B test was carried out to evaluate the presence of chromium depletion regions with heat treatments. The results showed that with increasing aging duration, the degree of sensitization and IGC rates initially increased and then decreased with heat treatment. The pitting potentials decreased continuously with increase in aging duration up to 10 h as assessed by potentiodynamic polarization tests. The SECM area scan measurements showed more metastable pitting corrosion events for 30 min and 10 h aged specimens compared to the 48 h aged specimen at passive potential in 0.1M neutral chloride ion solution.

Evaluation of Pitting Corrosion in Duplex Stainless Steel Fe20Cr9ni for Nuclear Power Application

2020 ◽  
Author(s):  
Bin Yang ◽  
Yuefeng Chen ◽  
Yangtao Zhou ◽  
Yuan Wu ◽  
Huihui Zhu
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Pitting Corrosion ◽  
Nuclear Power ◽  
Power Application

Crevice and pitting corrosion of low temperature plasma nitrided UNS S32750 super duplex stainless steel

2021 ◽  
Vol 413 ◽  
pp. 127095
Author(s):  
Oriana Palma Calabokis ◽  
Yamid Núñez de la Rosa ◽  
Carlos M. Lepienski ◽  
Rodrigo Perito Cardoso ◽  
Paulo César Borges
Keyword(s):  
Stainless Steel ◽  
Low Temperature ◽  
Duplex Stainless Steel ◽  
Pitting Corrosion ◽  
Super Duplex Stainless Steel ◽  
Low Temperature Plasma ◽  
Temperature Plasma

Effect of post-weld heat treatment on microstructure evolution and pitting corrosion behavior of UNS S31803 duplex stainless steel welds

2012 ◽  
Vol 62 ◽  
pp. 42-50 ◽  
Author(s):  
Ziying Zhang ◽  
Zhiyu Wang ◽  
Yiming Jiang ◽  
Hua Tan ◽  
Dong Han ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Corrosion Behavior ◽  
Microstructure Evolution ◽  
Pitting Corrosion ◽  
Post Weld Heat Treatment ◽  
Steel Welds ◽  
Weld Heat

scholarly journals Influence of Molybdenum on Microstructure and Pitting Corrosion Behavior of Solution-Treated Duplex Stainless Steel in a Lithium Chloride Solution

2019 ◽  
Vol 22 (suppl 1) ◽  
Author(s):  
Stephania Cappellari de Rezende ◽  
Isabela Dainezi ◽  
Raíra Chefer Apolinario ◽  
Lucíola Lucena de Sousa ◽  
Neide Aparecida Mariano
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Corrosion Behavior ◽  
Lithium Chloride ◽  
Pitting Corrosion ◽  
Chloride Solution ◽  
Solution Treated ◽  
Lithium Chloride Solution
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