Effect of Dissolved Oxygen on Pitting Corrosion Behavior of Low-Alloy Steel under Hydrostatic Pressure

2019 ◽  
pp. 4812-4827
Author(s):  
Hongyi Su ◽  
Keyword(s):  
Hydrostatic Pressure ◽  
Dissolved Oxygen ◽  
Alloy Steel ◽  
Corrosion Behavior ◽  
Pitting Corrosion ◽  
Low Alloy Steel

The Corrosion Behavior of Welded Low Alloy Steel

CORROSION ◽  
1960 ◽  
Vol 16 (4) ◽  
pp. 205t-208t ◽  
Author(s):  
D. C. BRIGGS ◽  
J. U. MacEWAN ◽  
H. H. YATES
Keyword(s):  
Alloy Steel ◽  
Corrosion Behavior ◽  
Low Alloy Steel

Corrosion Risk and Repassivation of Duplex Stainless Steel UNS S82551 in Treated Seawater Injection Service

CORROSION ◽  
10.5006/3697 ◽  
2021 ◽  
Author(s):  
Nicolas Larche ◽  
Perry Nice ◽  
Hisashi Amaya ◽  
Lucrezia Scoppio ◽  
Charles Leballeur ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Dissolved Oxygen ◽  
Duplex Stainless Steel ◽  
Oxygen Content ◽  
Alloy Steel ◽  
Stainless Steels ◽  
Crevice Corrosion ◽  
Low Alloy Steel ◽  
Corrosion Risk ◽  
Service Conditions

In seawater injection wells, the available well tubing materials are generally Low alloy steel, Glass Reinforced Epoxy lined low alloy steel or Corrosion Resistant Alloy’s (CRA) such as super duplex stainless steel. However, in treated seawater the corrosion risk can be controlled and lower grade alloys (low alloy steel) can be considered. But for long well lifetime designs (20 years plus), then low alloy steel tubing can be challenged. In this respect recent efforts have focused attention on better dissolved oxygen control which permits the investigation and on the possible use of more cost-effective materials such as the duplex stainless steels UNS S82551, and UNS S82541 (the latter is a higher strength version, but same PRENw). Full scale testing of tubes joined together with a proprietary premium threaded connection (PCPC couplings) was performed in controlled seawater loops simulating service conditions at 30°C. The flow rate and dissolved oxygen were controlled at 5 m/s and <20ppb, respectively. Weekly dissolved oxygen excursions corresponding to 24h at 100ppb followed by 1 hour at 300ppb were performed during the 5 months exposure. Corrosion results of UNS S82551/S82541 tubing were compared to UNS S31803 and UNS S39274. In parallel, laboratory exposures of creviced coupons for parametric study were performed in dissolved oxygen-controlled cells, allowing the measurement of electrochemical potentials as function of dissolved oxygen content and the related corrosion resistance. The results showed that dissolved oxygen content should be properly controlled below critical values to avoid crevice corrosion of the lesser alloyed duplex stainless steels. The ability of UNS S82541 to recover or re-passivate after prolonged exposures to high dissolved oxygen concentrations (DOC) was also determined with both the use of full sized pipe-coupling premium connection (PCPC) test cells, and electrochemical testing involving a Remote Crevice Assembly (RCA). The re-passivation potential was investigated after different active crevice corrosion durations. The results of the study allowed to precisely define the limits of use of UNS S82541 in treated seawater, i. e. the critical DOC conditions for corrosion initiation and for re-passivation of UNS S82541. For all tested conditions, the UNS S82551/S82541 showed a rather good ability to re-passivation when normal service conditions (i. e. low dissolved oxygen) are recovered.

Effect of Cavitation on Corrosion Behavior of 20SiMn Low-Alloy Steel in 3% Sodium Chloride Solution

CORROSION ◽  
2003 ◽  
Vol 59 (7) ◽  
pp. 597-605 ◽  
Author(s):  
S. Z. Luo ◽  
Y. G. Zheng ◽  
M. C. Li ◽  
Z. M. Yao ◽  
W. Ke
Keyword(s):  
Sodium Chloride ◽  
Alloy Steel ◽  
Corrosion Behavior ◽  
Chloride Solution ◽  
Sodium Chloride Solution ◽  
Low Alloy Steel

Effect of Cu on corrosion behavior of low alloy steel under the simulated bottom plate environment of cargo oil tank

2017 ◽  
Vol 121 ◽  
pp. 84-93 ◽  
Author(s):  
Xuehui Hao ◽  
Junhua Dong ◽  
Jie Wei ◽  
Ini-Ibehe Nabuk Etim ◽  
Wei Ke
Keyword(s):  
Alloy Steel ◽  
Corrosion Behavior ◽  
Bottom Plate ◽  
Low Alloy Steel ◽  
Cargo Oil Tank ◽  
Oil Tank

scholarly journals Influence of shot peening on corrosion behavior of low alloy steel

2020 ◽  
Vol 7 (1) ◽  
pp. 016574
Author(s):  
Mingliang Qiao ◽  
Jing Hu ◽  
Kai Guo ◽  
Qingfeng Wang
Keyword(s):  
Alloy Steel ◽  
Corrosion Behavior ◽  
Shot Peening ◽  
Low Alloy Steel

scholarly journals Effect of Tryptophan on the corrosion behavior of low alloy steel in sulfamic acid

2016 ◽  
Vol 9 ◽  
pp. S1069-S1076 ◽  
Author(s):  
Hesham T.M. Abdel-Fatah ◽  
Salah A.M. Rashwan ◽  
S.M. Abd El Wahaab ◽  
Aliaa A.M. Hassan
Keyword(s):  
Alloy Steel ◽  
Corrosion Behavior ◽  
Sulfamic Acid ◽  
Low Alloy Steel
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