Short-term corrosion behavior of polycrystalline Ni3Al-based superalloy in sulfur-containing atmosphere

AbstractAlloy 22 (N06022) is a highly corrosion resistant nickel based alloy. Extensive research has been conducted in the last eight years on the corrosion behavior of Alloy 22, mainly regarding its resistance to localized corrosion. Less attention has been paid to the general corrosion resistance in highly concentrated brines that may result from the deliquescence of salts contained in dust. Salts such as mixtures of NaCl, KCl, CaCl2, NaNO3, and KNO3 may deliquesce at temperatures above 100°C through absorption of moisture from the air. Electrochemical tests were used to assess the general corrosion behavior of Alloy 22 in brines with chloride and nitrate concentrations ranging from 8 molal to 100 molal in the temperature range 100 to 160°C. The effect of mixed anions and cations was also studied. Results show that, even for short-term immersion periods, the corrosion rate of Alloy 22 in high temperatures super concentrated brines is generally below 10 μm/year.

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Short term online corrosion measurements in biomass fired boilers. Part 2: Investigation of the corrosion behavior of three selected superheater steels for two biomass fuels

Fuel Processing Technology ◽

10.1016/j.fuproc.2015.09.021 ◽

2016 ◽

Vol 142 ◽

pp. 59-70 ◽

Cited By ~ 12

Author(s):

Stefan Retschitzegger ◽

Thomas Gruber ◽

Thomas Brunner ◽

Ingwald Obernberger

Keyword(s):

Corrosion Behavior ◽

Biomass Fuels ◽

Short Term

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Corrosion Behavior of Cr-Mo Alloy Steel in Direct Contact with Elemental Sulfur

Materials Science Forum ◽

10.4028/www.scientific.net/msf.887.9 ◽

2017 ◽

Vol 887 ◽

pp. 9-13

Author(s):

Ladan Khaksar ◽

John Shirokoff

Keyword(s):

Alloy Steel ◽

Corrosion Behavior ◽

Elemental Sulfur ◽

Oil And Gas ◽

Gas Production ◽

Chemical Degradation ◽

Oil And Gas Production ◽

Aqueous Conditions ◽

Tubular Components ◽

Sulfur Containing

The chemical degradation of stainless steel components in sulfur-containing environments is a major concern in oil and gas production. 4130 Cr-Mo alloy steel is widely used as tubing and tubular components in sour services. According to the previous research in aqueous conditions, contact of solid sulfur with alloy steel can initiate catastrophic corrosion problems. This paper discusses elemental sulfur corrosion of Cr-Mo alloy steel in 3.5% sodium chloride solution at pH 2 and 5 during 20 and 30 hours immersion time. The corrosion behavior was monitored by potentiodynamic polarization technique during the experiments. Energy Dispersive X-ray Spectroscopy (EDS), and Scanning Electron Microscopy (SEM) have been applied to characterize the corrosion products after each experiment.

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Comparative Corrosion Behavior of Two Palladium-Containing Titanium Alloys

Volume 7: Operations, Applications, and Components ◽

10.1115/pvp2006-icpvt-11-93418 ◽

2006 ◽

Author(s):

Tiangan Lian ◽

Takashi Yashiki ◽

Takenori Nakayama ◽

Tomoaki Nakanishi ◽

Rau´l B. Rebak

Keyword(s):

Titanium Alloys ◽

Corrosion Behavior ◽

High Strength ◽

Yucca Mountain ◽

Short Term ◽

Corrosion Resistant ◽

Electrochemical Testing ◽

Ti Alloys ◽

Potentiodynamic Curves ◽

Titanium Grade

The ASTM standard B 265 provides the requirements for the chemical composition of titanium (Ti) alloys. It is planned to use corrosion resistant and high strength titanium alloys to fabricate the drip shield at the proposed Yucca Mountain Repository. Titanium grade (Gr) 7 (R52400) and other Ti alloys are currently being characterized for this application. Ti Gr 7 contains 0.15% Palladium (Pd) to increase its corrosion performance. In this article we report results on the comparative short term corrosion behavior of Ti Gr 7 and a Ruthenium (Ru) containing alloy (Ti Gr 33). Ti Gr 33 also contains a small amount of Pd. Limited electrochemical testing such as polarization resistance and cyclic potentiodynamic curves showed that both alloys have a similar corrosion behavior in the tested environments.

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Short-term electrochemical corrosion behavior of pipeline steel in saline sandy environments

Engineering Failure Analysis ◽

10.1016/j.engfailanal.2015.11.007 ◽

2016 ◽

Vol 59 ◽

pp. 410-418 ◽

Cited By ~ 6

Author(s):

Bin He ◽

Chun-hui Lu ◽

Peng-ju Han ◽

Xiao-hong Bai

Keyword(s):

Corrosion Behavior ◽

Pipeline Steel ◽

Electrochemical Corrosion ◽

Short Term ◽

Electrochemical Corrosion Behavior

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Chi Phase after Short-term Aging and Corrosion Behavior in 2205 Duplex Stainless Steel

Journal of Iron and Steel Research International ◽

10.1016/s1006-706x(16)30159-5 ◽

2016 ◽

Vol 23 (10) ◽

pp. 1071-1079 ◽

Cited By ~ 10

Author(s):

Qi Sun ◽

Jian Wang ◽

Hua-bing Li ◽

Yue Li ◽

Ya-di Hu ◽

...

Keyword(s):

Stainless Steel ◽

Duplex Stainless Steel ◽

Corrosion Behavior ◽

Short Term ◽

2205 Duplex Stainless Steel

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Sulﬁde Stress Cracking Resistance of High Strength Low Alloy Steel

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.573-574.1182 ◽

2012 ◽

Vol 573-574 ◽

pp. 1182-1186

Author(s):

Ji Hao Cheng ◽

Yi Qiang Sun

Keyword(s):

Corrosion Rate ◽

Anodic Dissolution ◽

Corrosion Behavior ◽

High Strength ◽

Constant Load ◽

Saturated Solution ◽

Short Term ◽

Stress Cracking ◽

Sulfide Stress ◽

Sulfide Stress Cracking

This paper analyzed the HSLA pipeline steel’s stress corrosion behavior and mechanism which tested in the saturated solution of H2S. The steel’s SSCC susceptibility was determined by constant load tensile according to NACE TM-0177 standard. Used SEM observed the fracture, and then the steel’s corrosion rate and short-term corrosion behavior were analyzed by electrochemical polarization curves in saturated solution of H2S in the environment A. The results show that the steel has a large SSCC susceptibility and a high corrosion rate. What’s more, corrosion rate increases with the increase of immersion time. The results also show that the crack fracture of the steel is caused by anodic dissolution and the hydrogen which penetrates into the steel can increase the anodic dissolution.

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