The Corrosion of Cast Duplex Stainless Steels in Seawater and Sour Brines

CORROSION ◽  
10.5006/3284 ◽  
2019 ◽  
Vol 75 (11) ◽  
pp. 1383-1390 ◽  
Author(s):  
Roger Francis ◽  
Stan Hebdon
Keyword(s):  
Stainless Steels ◽  
Technical Specification ◽  
Duplex Stainless Steels ◽  
Wide Range ◽  
Phase Balance ◽  
Sulfide Stress ◽  
Corrosion Problem ◽  
Lower Chloride ◽  
Sulfide Stress Corrosion Cracking ◽  
Corrosion Data

Modern duplex stainless steels have been in use since the early 1970s and cast versions of the wrought alloys were soon in demand for pumps and valves. Since that time a range of cast duplex stainless steels have been developed with a wide range of compositions, but all with approximately 50/50 austenite/ferrite phase balance and deliberate additions of nitrogen. This paper presents some comparative corrosion data on a range of cast duplex stainless steels, mainly in seawater. The differences in performance related to composition and microstructure are discussed. Corrosion data in lower chloride brines are also presented to show the limits of use of some lower alloyed duplex materials. In addition to oxidizing chloride solutions, some data are presented on cast duplex stainless steels in reducing brines containing H2S, where the main corrosion problem is sulfide stress corrosion cracking. Finally, the importance of using a suitable technical specification, over and above ASTM, combined with selecting a suitably skilled foundry in order to obtain satisfactory castings is discussed.

scholarly journals Hydrogen Sulfide Stress Corrosion Cracking of Stainless Steels

1974 ◽  
Vol 17 (3) ◽  
pp. 234-239
Author(s):  
Daizo Yamasaki ◽  
Toshikazu Shinkawa ◽  
Sadato Shigemura
Keyword(s):  
Hydrogen Sulfide ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Stainless Steels ◽  
Corrosion Cracking ◽  
Sulfide Stress ◽  
Sulfide Stress Corrosion Cracking

Japanese Welding Guideline for Duplex Stainless Steels

2019 ◽  
Author(s):  
Hiroyuki Iwamoto ◽  
Fumiyoshi Minami
Keyword(s):  
Weld Metal ◽  
Base Metal ◽  
Stainless Steels ◽  
Practical Experience ◽  
Duplex Stainless Steels ◽  
Research Committee ◽  
Engineering Society ◽  
Key Points ◽  
Phase Balance ◽  
The Difference

Abstract A Japanese welding guideline for duplex stainless steels (DSSs)1) has been developed in a Sub-Committee of Chemical Plant Welding Research Committee in the Japan Welding Engineering Society. The guideline recommends 13 key points as a basis to prevent the unforeseen corrosion of weldments, which are based on practical experience in Japanese Oil & Gas and Chemical industries and similar published guidelines. The principal concept is how to obtain an acceptable ratio of ferrite/austenite phase balance along with no detrimental intermetallic compounds in the weld metal and heat affected zone. For the weld metal, consumable selection, the shielding and purging gas composition and weld heat input control are most critical. For HAZ, the nitrogen content of the base metal is most critical. This guideline is developed for DSS welders and welding engineers so as to understand the difference of DSS from standard austenitic stainless steel. This guideline is composed of three parts, the first is 13 basic recommendations, the second is to explain some technical aspects for these 13 key points and the third contains comprehensive data relating DSS base metal and weld metal including some important key points for each step of fabrication to understand the welding characteristics of DSS clearly. This paper introduces the basic 13 recommendations for guidance purpose in addition to the mandatory requirements of the construction code in Japan.

The sulfide stress corrosion cracking of high alloy stainless steels for oil and natural gas wells

1987 ◽  
Vol 27 (10-11) ◽  
pp. 1213-1223 ◽  
Author(s):  
A. Cigada ◽  
T. Pastore ◽  
P. Pedeferri ◽  
B. Vicentini
Keyword(s):  
Natural Gas ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Stainless Steels ◽  
Corrosion Cracking ◽  
Gas Wells ◽  
High Alloy ◽  
Sulfide Stress ◽  
Oil And Natural Gas ◽  
Sulfide Stress Corrosion Cracking

Welding design methodology for optimization of phase balance in duplex stainless steels during autogenous arc welding under Ar–N2 atmosphere

2018 ◽  
Vol 63 (1) ◽  
pp. 3-10 ◽  
Author(s):  
A. Rokanopoulou ◽  
P. Skarvelis ◽  
G. D. Papadimitriou
Keyword(s):  
Stainless Steels ◽  
Arc Welding ◽  
Design Methodology ◽  
Duplex Stainless Steels ◽  
N2 Atmosphere ◽  
Phase Balance

CHROMIUM CONCENTRATION IN AND AROUND FERRITE-AUSTENITE PHASE BOUNDARIES IN DUPLEX STAINLESS STEELS

1989 ◽  
Vol 50 (C8) ◽  
pp. C8-361-C8-364 ◽  
Author(s):  
V. J. GADGIL ◽  
J. J. SWENS ◽  
B. H. KOLSTER
Keyword(s):  
Stainless Steels ◽  
Chromium Concentration ◽  
Austenite Phase ◽  
Duplex Stainless Steels ◽  
Phase Boundaries

Duplex stainless steels

1997 ◽  
Author(s):  
Robert N Gunn
Keyword(s):  
Stainless Steels ◽  
Duplex Stainless Steels

Corrosion Resistance of New Duplex Stainless Steels in Coke Production

2020 ◽  
Vol 63 (2) ◽  
pp. 88-96
Author(s):  
S. V. Nesterenko
Keyword(s):  
Corrosion Resistance ◽  
Stainless Steels ◽  
Coke Production ◽  
Duplex Stainless Steels

BRILLIANT 2101 T-1 AP

Alloy Digest ◽  
2012 ◽  
Vol 61 (4) ◽  
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
Tensile Properties ◽  
Stainless Steels ◽  
Duplex Stainless Steels ◽  
Good Balance ◽  
Steel Wires

Abstract Stoody AP stainless steel wires are all-position wires. The nickel in this product will achieve a good balance of austenite and ferrite in lean duplex stainless steels. This datasheet provides information on composition and tensile properties as well as fracture toughness. It also includes information on forming and joining. Filing Code: SS-1118. Producer or source: Stoody Company.

Effect of boron on the pitting corrosion resistance in HAZ of duplex stainless steels.

1986 ◽  
Vol 4 (2) ◽  
pp. 410-417 ◽  
Author(s):  
Yoshikuni Nakao ◽  
Kazutoshi Nishimoto ◽  
Hiromasa Horii
Keyword(s):  
Corrosion Resistance ◽  
Pitting Corrosion ◽  
Stainless Steels ◽  
Duplex Stainless Steels ◽  
Pitting Corrosion Resistance
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