Localized Corrosion Resistance Of Welded Austenitic And Lean Duplex Stainless Steels

2011 ◽  
Vol 55 (9-10) ◽  
pp. 19-27 ◽  
Author(s):  
Mikael Magnus Johansson ◽  
Elin Marianne Westin ◽  
James Oliver ◽  
Rachel F. A. Pettersson
Keyword(s):  
Corrosion Resistance ◽  
Stainless Steels ◽  
Duplex Stainless Steels ◽  
Localized Corrosion

scholarly journals Effects of Cu Addition on the Microstructure and Localized Corrosion Resistance of Hyper Duplex Stainless Steels Aged at 748 K

2015 ◽  
Vol 56 (5) ◽  
pp. 749-754 ◽  
Author(s):  
Kyeong-Ho Kong ◽  
Soon-Hyeok Jeon ◽  
Soon-Tae Kim ◽  
Do-Hyang Kim ◽  
Byoung-Jin Kim ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Stainless Steels ◽  
Duplex Stainless Steels ◽  
Localized Corrosion

scholarly journals Use of the Critical Acidification Model to Estimate the Influence of W in the Localized Corrosion Resistance of 25Cr Super Duplex Stainless Steels

Metals ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1364
Author(s):  
Cristian Torres ◽  
Mariano Iannuzzi ◽  
Roy Johnsen
Keyword(s):  
Corrosion Resistance ◽  
Stainless Steels ◽  
Potentiodynamic Polarization ◽  
Ph Value ◽  
Sem Analysis ◽  
Duplex Stainless Steels ◽  
Localized Corrosion ◽  
Significant Difference ◽  
Super Duplex Stainless Steels ◽  
Acidification Model

Two super duplex stainless steels (SDSS) with different W content, namely UNS S32750 (W-free) and UNS S39274 (2.1 wt.% W), were tested in simulated crevice corrosion environments to determine the influence of W on their corrosion resistance. Anodic potentiodynamic polarization experiments were performed in two different crevice-like-solutions: 1 M HCl (as reference for a pH = 0 environment), and 7 M LiCl, adjusted to the same pH value. Galvele’s critical acidification model was used to estimate the theoretical critical potential (Ecrit) and comparatively evaluate the corrosion resistance of the two SDSS. The anodic potentiodynamic polarization results showed a statistically significant difference between the two materials in only one test condition, i.e., 7 M Cl− at 60 °C. Additionally, the quantification of chemical dissolution of the metal cations after the tests suggested a surface enrichment in W only in the 7 M chloride solution. Scanning electron microscope (SEM) analysis indicated a uniform dissolution experienced by UNS S32750 in this environment, whereas UNS S39274 suffered selective corrosion of the ferrite-phase. These observations were reflected in a slight increase in the Ecrit values of UNS S32974 estimated with Galvele’s model.

SUMITOMO DP3W

Alloy Digest ◽  
1994 ◽  
Vol 43 (9) ◽  
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Stainless Steels ◽  
Heat Treating ◽  
Duplex Stainless Steels ◽  
Localized Corrosion ◽  
Temperature Performance ◽  
Super Duplex Stainless Steels

Abstract DP3W is part of a family of super duplex stainless steels with pitting resistance equivalents (PRE) equal to or greater than 40 and highly alloyed with chromium, molybdenum, nitrogen and tungsten. They resist localized corrosion in aggressive chloride-containing environments and have application in oil country tubular goods (OCTG). This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as heat treating and joining. Filing Code: SS-573. Producer or source: Sumitomo Metal Industries Ltd.

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