Preparation and Corrosion Resistance of Superhydrophobic Ni- P-Al2O3 Coating on Pipeline Steel in simulated alkaline soil solution

Corrosion behaviors of X80 pipeline steel were investigated in different simulated alkaline soil solution using electrochemical test, EDS coupled to SEM and weight loss method. The results showed uniform corrosion was happened on X80 steel in Shanshan and Hami simulated solution, and local corrosion was the main failure mode for X80 steel in Yumen simulated solution. The ranking of corrosion rate of X80 steel from the biggest in simulated solution was Hami, Shanshan and Yumen. With the increasing of immersion time, a dense Ca2+ deposited layer was formed on the surface of X80 steel, which could inhibiting the Cl- effects on the corrosion of X80 steel in Shanshan and Hami solution. The SO42- competition absorbed effect could provide certain corrosion protection for X80 steel in Yumen solution at the early corrosion stage.

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Effects of pH on the Electrochemical Behavior and Stress Corrosion Cracking of X80 Pipeline Steel in Simulated Alkaline Soil Solution

International Journal of Electrochemical Science ◽

10.20964/2019.07.09 ◽

2019 ◽

pp. 6247-6256 ◽

Cited By ~ 3

Author(s):

Ping Liang ◽

Keyword(s):

Stress Corrosion ◽

Soil Solution ◽

Stress Corrosion Cracking ◽

Electrochemical Behavior ◽

Pipeline Steel ◽

Corrosion Cracking ◽

Alkaline Soil ◽

X80 Pipeline Steel ◽

Effects Of Ph

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

Coatings ◽

10.3390/coatings11060625 ◽

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.

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Corrosion Resistance of Dissimilar GTA Welds of Pipeline Steel and Super Duplex Stainless Steels in Synthetic Brine

CORROSION ◽

10.5006/3746 ◽

2021 ◽

Author(s):

Víctor Vargas ◽

Apolinar Albiter-Hernandez ◽

Marco Dominguez Aguilar ◽

Gerardo Altamirano-Guerrero ◽

Cuahtemoc Maldonado

Keyword(s):

Stainless Steel ◽

Corrosion Resistance ◽

Duplex Stainless Steel ◽

Pipeline Steel ◽

Localized Corrosion ◽

Nickel Wire ◽

Super Duplex Stainless Steel ◽

Gas Tungsten Arc ◽

Dissimilar Welds ◽

Super Duplex Stainless Steels

The effect of weld passes and single V grove designs, on the corrosion resistance of dissimilar welds of a low alloy steel and a super-duplex stainless steel, was studied in synthetic brine. Welds were manufactured in argon by gas tungsten arc (GTA) technique and joined by a high nickel wire of super-duplex stainless steel. Samples of weld regions were characterized by composition scans, electrochemical measurements, micro-hardness and scanning electron microscopy. In X52/ER2594, a transition region (TR) of grain boundaries type II and a band of martensite were formed. The base metal of X52 underwent the highest corrosion rate and localized corrosion occurred in the heat affected zone. Interface ER2594/25Cr7Ni and 25Cr7Ni showed the presence of pitting near intermetallics.

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