scholarly journals Corrosion Behavior of X100 Steel Heat-affected Zone in Acidic Soil Solution

2022 ◽  
pp. ArticleID:220234
Author(s):  
Chenqi Fu ◽  
Keyword(s):  
Soil Solution ◽  
Corrosion Behavior ◽  
Heat Affected Zone ◽  
Acidic Soil ◽  
Steel Heat

scholarly journals Effect of Sulfate-Reducing Bacteria (SRB) on the Corrosion of Buried Pipe Steel in Acidic Soil Solution

Coatings ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 625
Author(s):  
Lijuan Chen ◽  
Bo Wei ◽  
Xianghong Xu
Keyword(s):  
Soil Solution ◽  
Steel Surface ◽  
Pipeline Steel ◽  
Electrochemical Techniques ◽  
Sulfate Reducing Bacteria ◽  
Acidic Soil ◽  
Microbiologically Influenced Corrosion ◽  
Soil Environment ◽  
Sulfate Reducing ◽  
Reducing Bacteria

The influence of sulfate-reducing bacteria (SRB) on the corrosion behaviors of X80 pipeline steel was investigated in a soil environment by electrochemical techniques and surface analysis. It was found that SRB grew well in the acidic soil environment and further attached to the coupon surface, resulting in microbiologically influenced corrosion (MIC) of the steel. The corrosion process of X80 steel was significantly affected by the SRB biofilm on the steel surface. Steel corrosion was inhibited by the highly bioactive SRB biofilm at the early stage of the experiment, while SRB can accelerate the corrosion of steel at the later stage of the experiment. The steel surface suffered severe pitting corrosion in the SRB-containing soil solution.

Effect of alternating current and Bacillus cereus on the stress corrosion behavior and mechanism of X80 steel in a Beijing soil solution

2019 ◽  
Vol 127 ◽  
pp. 49-58 ◽  
Author(s):  
Hongxia Wan ◽  
Dongdong Song ◽  
Cuiwei Du ◽  
Zhiyong Liu ◽  
Xiaogang Li
Keyword(s):  
Bacillus Cereus ◽  
Stress Corrosion ◽  
Soil Solution ◽  
Corrosion Behavior ◽  
Alternating Current ◽  
X80 Steel

Local additional potential model for effect of strain rate on SCC of pipeline steel in an acidic soil solution

2009 ◽  
Vol 51 (12) ◽  
pp. 2863-2871 ◽  
Author(s):  
Z.Y. Liu ◽  
X.G. Li ◽  
C.W. Du ◽  
Y.F. Cheng
Keyword(s):  
Strain Rate ◽  
Soil Solution ◽  
Potential Model ◽  
Pipeline Steel ◽  
Acidic Soil

scholarly journals Erratum to: Intergranular Corrosion Behavior of 304LN Stainless Steel Heat Treated at 623 K (350 °C)

2013 ◽  
Vol 44 (7) ◽  
pp. 3419-3419 ◽  
Author(s):  
Raghuvir Singh ◽  
Mukesh Kumar ◽  
Mainak Ghosh ◽  
Gautam Das ◽  
P. K. Singh ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Corrosion Behavior ◽  
Intergranular Corrosion ◽  
Heat Treated ◽  
304Ln Stainless Steel ◽  
Stainless Steel Heat ◽  
Steel Heat

Microstructure and Galvanic Corrosion of Dissimilar Weldment Between Duplex Stainless Steel UNS 31803 and X80 Steel

2009 ◽  
Author(s):  
Xiaoyan Wang ◽  
Lei Zhang ◽  
Xianren Kuang ◽  
Minxu Lu
Keyword(s):  
Stainless Steel ◽  
Weld Metal ◽  
Duplex Stainless Steel ◽  
Corrosion Behavior ◽  
Heat Affected Zone ◽  
Galvanic Corrosion ◽  
Base Material ◽  
Nacl Solution ◽  
Gas Field ◽  
X80 Steel

Kela-2 Gas Field is the main supply for the West-East Gas Pipeline which runs across China with length of 4000 kilometers. Natural gas from Kela-2 contains CO2/H2S sour components and 10% condensation water, which makes the medium present very strong corrosivity. In avoidance of corrosion failure, DSS UNS S31803 line pipes were introduced to transmit the gas from the Gas Field to gathering center and processing factory. And it is the first time DSS pipes which is totally about 13km were widely used in oil and gas pipeline around the world. As it is known, DSS UNS S31803 pipes and traditional linepipes X80 were welded together between the gathering lines and mainline. Duplex stainless steel (DSS) UNS S31803 and X80 were welded by metal inertia gas welding (MIG) with consumable ER2209, and the joints take on good mechanical properties. The type II boundary close to the fusion boundary at the carbon steel side was observed by SEM. Obvious concentration gradient of Ni and Cr was observed in the region between the two boundaries, where the hardness was much higher. The weld metal with columnar and some polygonal ferrites take on good passivation against test solution. The heat affected zone beside the X80 base material is mostly granular bainite, some polygonal ferrites and few MA, X80 base material present obvious rolling state, the microstructure of which is the same to X80 heat affected zone, but the level of crystal size reach to 11.6. The corrosion behavior of them dosen’t have any difference, but the corrosion potential of X80 HAZ is much higher than X80 BM, about 50 mv, the corrosion rate of X80 HAZ is also much higher than X80 base material. Potential curves of different weldment regions were also studied in 3.5% NaCl solution and 3.5% NaCl solution with saturated CO2. Galvanic corrosion behavior of weld metal and X80 steel was also tested and the conclusion is: The cathode reaction is controlled by oxygen diffusion, and when area ratio S (S = Ac / Aa, Ac is the area of DSS WM, Aa is the area of X80 BM) increases, corrosion current of X80 is enhanced rapidly, which is called “gathering principle”. When the weld metal and X80 coupled, cathode has much higher polarization potential and is protected completely.

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