scholarly journals Preferential Dissolution Mechanism of α or γ phase in Crevice Corrosion of Duplex Stainless Steels

2016 ◽  
Vol 65 (2) ◽  
pp. 45-50 ◽  
Author(s):  
So Aoki
Keyword(s):  
Stainless Steels ◽  
Crevice Corrosion ◽  
Duplex Stainless Steels ◽  
Dissolution Mechanism ◽  
Gamma Phase ◽  
Preferential Dissolution

Detecting Critical Crevice Temperature for Duplex Stainless Steels in Chloride Solutions

CORROSION ◽  
2011 ◽  
Vol 67 (2) ◽  
pp. 025004-1-025004-7 ◽  
Author(s):  
D. Han ◽  
Y. Jiang ◽  
B. Deng ◽  
L. Zhang ◽  
J. Gao ◽  
...  
Keyword(s):  
Stainless Steels ◽  
Crevice Corrosion ◽  
Electrochemical Method ◽  
Duplex Stainless Steels ◽  
Good Reproducibility ◽  
X Ray ◽  
Initiation Step ◽  
Critical Pitting Temperature ◽  
Preferential Dissolution ◽  
Scanning Electron

Abstract A simple and rapid electrochemical method for the evaluation of crevice corrosion in duplex stainless steels (DSS) is described. Three types of DSS—namely, UNS S32101, UNS S31803, and UNS S32750—were tested in 1 mol/L sodium chloride (NaCl) solutions. Results showed good reproducibility with a typical standard deviation of below 3°C. The critical pitting temperature (CPT) for the same specimens was also investigated in 1 mol/L NaCl solutions. An approximately 20°C decrease from CPT to critical crevice temperature (CCT) was observed and subsequently explained. Then, the morphologies of crevice corrosion were studied using scanning electron microscopy with energy-dispersive x-ray spectroscopy (SEM/EDS) method. The SEM/EDS study revealed that the ferrite phase was the site where preferential dissolution took place at the initiation step of crevice corrosion, which was in accordance with the prediction by calculating the critical crevice index. Moreover, repassivation was detected with the development of crevice corrosion. The reason was clarified by combining the results obtained with a successful diffusion model, and eventually the crevice corrosion progress was illustrated schematically.

Crevice corrosion of duplex stainless steels in natural and chlorinated seawater

2011 ◽  
Vol 108 (7-8) ◽  
pp. 451-463 ◽  
Author(s):  
N. Larché ◽  
D. Thierry ◽  
V. Debout ◽  
J. Blanc ◽  
T. Cassagne ◽  
...  
Keyword(s):  
Stainless Steels ◽  
Crevice Corrosion ◽  
Duplex Stainless Steels

scholarly journals Effect of Tantalum Addition on Crevice Corrosion of Super Duplex Stainless Steels

2015 ◽  
Vol 64 (11) ◽  
pp. 497-500 ◽  
Author(s):  
Makoto Kawamori ◽  
Junichiro Kinugasa ◽  
Yosuke Yonenaga ◽  
Yuko Fukuta ◽  
Masaki Shimamoto ◽  
...  
Keyword(s):  
Stainless Steels ◽  
Crevice Corrosion ◽  
Duplex Stainless Steels ◽  
Super Duplex Stainless Steels

Crevice corrosion and environmentally assisted cracking of high-strength duplex stainless steels in simulated concrete pore solutions

2019 ◽  
Vol 203 ◽  
pp. 366-376 ◽  
Author(s):  
Robert D. Moser ◽  
Preet M. Singh ◽  
Lawrence F. Kahn ◽  
Kimberly E. Kurtis ◽  
David González Niño ◽  
...  
Keyword(s):  
Stainless Steels ◽  
Crevice Corrosion ◽  
High Strength ◽  
Duplex Stainless Steels ◽  
Environmentally Assisted Cracking
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