Characterization of Two Types of Stainless Steels Recommended for Manufacturing Brine Recirculation Pumps

2010 ◽  
Author(s):  
O. A. Abuzeid ◽  
A. I. Aljoboury ◽  
A.-H. I. Mourad ◽  
A. Alawar ◽  
M. Abou Zour
Keyword(s):  
Corrosion Resistance ◽  
Service Life ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Stainless Steels ◽  
Material Selection ◽  
Electrochemical Tests ◽  
Desalination Plants ◽  
Selection Of

In earlier works, characterization and stress corrosion cracking of casings of brine recirculation pumps, used in desalination plants, had been investigated. These casings which were manufactured from two types of Ni resist ductile irons have been reported to show different service lives. Material selection of casings is believed to be one of possible factors to extend the service life of these pumps. Two types of stainless steels; UNS S31603 and UNS S32750 have been recommended as substitutes to Ni resist ductile irons. In this work, mechanical, metallurgical, and electrochemical tests have been conducted on as received samples, made of these two types of stainless steels. Results have shown considerable higher yield and tensile strengths and corrosion resistance for the UNS S32750 over the UNS S31603. Results have also shown reproduced pitting behavior illustrated by measured pitting potentials and visual observations for UNS S31603 samples. UNS S32750 samples have shown no signs of pitting.

Effect of Corrosion Inhibition on the Stress Corrosion Cracking of UNS S31603 Austenitic Stainless Steel

2012 ◽  
Vol 476-478 ◽  
pp. 256-262 ◽  
Author(s):  
O.A. Abuzeid ◽  
A.I. Aljoboury ◽  
M. Abou Zour
Keyword(s):  
Corrosion Resistance ◽  
Stress Corrosion ◽  
Corrosion Inhibitor ◽  
Corrosion Inhibition ◽  
Stress Corrosion Cracking ◽  
Stainless Steels ◽  
Corrosion Cracking ◽  
Essential Components ◽  
Desalination Plants ◽  
Brine Environment

Brine recirculation pumps are essential components used for circulation of brine in multi-stage flashing chambers desalination plants. Failure of these pumps would result in shutdown of the desalination plants. The rotating parts of these pumps (shaft and impeller) are usually made out of stainless steels or Duplex stainless steels. The pressure parts (casings) are usually made out of Ni-resist ductile irons (NDI). In recent years there have been a number of cases in which NDI casing materials failed by stress corrosion cracking (SCC) especially in the Arabian Gulf region. This makes re-evaluation and further studies on the performance of these materials of paramount importance due to process-related economic and reliability considerations. As possible substitutes to NDI casing materials, the authors of this research have recently published material demonstrating the superiority of the SCC resistance of the super DSS, UNS S32750, over the ASS, UNS S31603, in hot brine environment. Economically, the idea of using chemical corrosion inhibitors to enhance the SCC resistance of the ASS, UNS S31603, is appealing, non famous and worth looking at. In this work the effect of corrosion inhibition on the corrosion resistance and SCC of the ASS, UNS S31603, in hot brine environment, is investigated. Brine water was injected with typical treat rate of 350 ppm of passivating type commercially available Molybdate corrosion inhibitor. Theoretically the corrosion inhibitor was proposed to improve the corrosion resistance of ASS, UNS S31603, in brine solution. Electrochemical polarization measurements and SCC tests were used to evaluate the performance of the metal under inhibited and uninhibited environments. Results have shown that treating the brine with this particular type of inhibitor under this particular treat rate and test conditions increased the pitting tendency of the ASS, UNS S31603. Results from both SCC tests and electrochemical measurements are in agreement and both role out the possibility of enhancing corrosion resistance and SCC of ASS UNS S31603 using Molybdate inhibitor.

Atmospheric Stress Corrosion Cracking (ASCC) Susceptibility of Stainless Alloys for Metallic Containers

2006 ◽  
Vol 932 ◽  
Author(s):  
Gen Nakayama
Keyword(s):  
Corrosion Resistance ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Stainless Steels ◽  
Spent Nuclear Fuel ◽  
Corrosion Cracking ◽  
Surface Conditions ◽  
Decay Heat ◽  
Fuel Elements ◽  
Surface Environment

ABSTRACTMetallic canisters placed in concrete casks and containing spent nuclear fuel elements, will be exposed to a moist oceanic atmosphere while the decay heat generated in the fuel elements cools for more than fifty years. Thus, the surface environment of the metallic canisters will be wet and covered with chloride compounds. The canisters may suffer atmospheric stress corrosion cracking. Therefore, corrosion tests for some potential alloys were conducted in an aqueous bittern solution, containing 22% enriched chloride compounds simulating the expected surface conditions of the canisters, to aid in selecting appropriate alloys based on corrosion resistance. The results suggest that the corrosion resistance of ordinary stainless steels, such as SUS304 and SUS316, is not high enough to avoid ASCC (atmospheric stress corrosion cracking) in the environment. Thus, a higher-grade stainless steel, namely, NSSC270 (20Cr-18Ni-6Mo-0.2N-Low C)or SUS836L (23.5Cr-25Ni-5.5Mo-0.2N-Low C, equivalent to AL-6XN) has been selected for this application.

Influence of Alloying Elements on the Stress Corrosion Behavior of Austenitic Stainless Steel

CORROSION ◽  
1969 ◽  
Vol 25 (1) ◽  
pp. 15-22 ◽  
Author(s):  
A. W. LOGINOW ◽  
J. F. BATES
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Stainless Steels ◽  
Austenitic Stainless Steels ◽  
Corrosion Cracking ◽  
Magnesium Chloride Solution ◽  
Stress Corrosion Resistance ◽  
Cold Worked

Abstract In certain applications, stress corrosion cracking of austenitic stainless steels has occurred when these steels are subjected to tension stresses (residual and applied) and are exposed to hot chloride solutions. Although stress corrosion cracking can be prevented by treatments to relieve residual stresses and by control of the environment, such procedures are expensive and not always reliable. An extensive study was therefore undertaken to develop a steel that would-be inherently resistant to stress corrosion cracking. The results of the study, conducted on stressed specimens of experimental steels immersed in a boiling 42% magnesium chloride solution, showed that carbon and nickel improved the stress corrosion resistance of annealed steels, and? nickel and silicon increased the resistance of cold-worked steels. It was also found that nitrogen decreased the resistance of annealed steels whereas phosphorus and molybdenum decreased the resistance of cold-worked steels. Manganese, copper, chromium, sulfur, and aluminum had little or no effect on stress corrosion resistance. This study resulted in the formulation of a steel composition containing 18% chromium, 18% nickel, 2% silicon, and 0.06% carbon, with low phosphorus and molybdenum contents. This steel was melted in an electric furnace; and1 its, stress corrosion, corrosion, and mechanical properties were determined. Test results show that the new steel (called USS 18-18-2 stainless steel) is much more resistant to stress; corrosion cracking than currently available austenitic stainless steels. Furthermore, the resistance of this steel is better than that of a 20% chromium, 34% nickel alloy that is being marketed; for its resistance to stress corrosion cracking.

Multi-scale characterization of stress corrosion cracking of cold-worked stainless steels and the influence of Cr content

2009 ◽  
Vol 57 (18) ◽  
pp. 5361-5381 ◽  
Author(s):  
S. Lozano-Perez ◽  
T. Yamada ◽  
T. Terachi ◽  
M. Schröder ◽  
C.A. English ◽  
...  
Keyword(s):  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Stainless Steels ◽  
Corrosion Cracking ◽  
Multi Scale ◽  
Cr Content ◽  
Cold Worked ◽  
Scale Characterization

The New Fe-Cr-Mo Ferritic Stainless Steels

CORROSION ◽  
1977 ◽  
Vol 33 (8) ◽  
pp. 279-295 ◽  
Author(s):  
R. F. STEIGERWALD ◽  
A. P. BOND ◽  
H. J. DUNDAS ◽  
E. A. LIZLOVS
Keyword(s):  
Corrosion Resistance ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Stainless Steels ◽  
Intergranular Corrosion ◽  
Crevice Corrosion ◽  
General Purpose ◽  
General Corrosion ◽  
Ferritic Stainless Steels ◽  
Corrosion Pitting

Abstract The new Fe-Cr-Mo ferritic stainless steels are reviewed with an emphasis on corrosion behavior. The properties of commercial steels are outlined showing how these alloys can be divided into general purpose (18Cr-2Mo), moderately severe service (26Cr-1Mo), and premium service (29Cr-4Mo) materials. The stress corrosion cracking (SCC), intergranular corrosion, pitting, crevice corrosion, and general corrosion of the Fe-Cr-Mo ferritic stainless steels in general is discussed. The influence of nickel on the corrosion resistance and toughness of ferritic stainless steels is considered.

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

2021 ◽  
Author(s):  
Robert Moser ◽  
Preet Singh ◽  
Lawrence Kahn ◽  
Kimberly Kurtis ◽  
David González Niño ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Hydrogen Embrittlement ◽  
Strain Rate ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Stainless Steels ◽  
Crevice Corrosion ◽  
High Strength ◽  
Environmentally Assisted Cracking ◽  
Rate Testing

This paper presents a study of crevice corrosion and environmentally assisted cracking (EAC) mechanisms in UNS S32205 and S32304 which were cold drawn to tensile strengths of approximately 1300 MPa. The study utilized a combination of electrochemical methods and slow strain rate testing to evaluate EAC susceptibility. UNS S32205 was not susceptible to crevice corrosion in stranded geometries at Cl⁻ concentrations up to 1.0 M in alkaline and carbonated simulated concrete pore solutions. UNS S32304 did exhibit a reduction in corrosion resistance when tested in a stranded geometry. UNS S32205 and S32304 were not susceptible to stress corrosion cracking at Cl⁻ concentrations up to 0.5 M in alkaline and carbonated solutions but were susceptible to hydrogen embrittlement with cathodic overprotection.

Stress Corrosion Cracking of Duplex Stainless Steels

2013 ◽  
Vol 794 ◽  
pp. 552-563 ◽  
Author(s):  
Indranil Chattoraj
Keyword(s):  
Corrosion Resistance ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Stainless Steels ◽  
Fracture Morphology ◽  
Selective Dissolution ◽  
Corrosion Cracking ◽  
Duplex Stainless Steels ◽  
Secondary Phases

The relative superiority of duplex stainless steels (DSS) over austenitic grades with regards to stress corrosion cracking (SCC) is discussed. The benefits of N to SCC resistance of DSS are provided. The selective dissolution of phases and its impact on corrosion SCC is reviewed. The hydrogen embrittlement of DSS is reviewed with emphasis on the ferrite participation, the role of environments and fracture morphology. The evolution of secondary phases and precipitates and the resultant change in corrosion resistance and SCC in DSS is discussed.

JESSOP JS ALLOY 20

Alloy Digest ◽  
1991 ◽  
Vol 40 (7) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Sulfuric Acid ◽  
Physical Properties ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Stainless Steels ◽  
Heat Treating ◽  
Carbide Precipitation ◽  
Acid Attack ◽  
Steel Company

Abstract Jessop JS alloy 20 was designed primarily for resistance to sulfuric acid attack. It also resists pitting and stress-corrosion cracking. It is columbium-stabilized to minimize carbide precipitation during welding. Often spoken of as one of the Super Stainless Steels, it carries a nickel alloy UNS number. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ni-371. Producer or source: Jessop Steel Company. Originally published April 1989, revised July 1991.

Sign in / Sign up

Export Citation Format

Share Document