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Effects of Renewable Natural Gas and Hydrogen on Microbially Influenced Corrosion and Souring in Underground Gas Storage

Product Number: 51324-21146-SG

Author: Scott Leleika; Taylor Rambo; Tekle Fida

Publication Date: 2024

$40.00

A bench scale laboratory experiment was conducted to assess the microbial corrosion and souring effects renewable natural gas (RNG) and natural gas amended with hydrogen have on underground gas storage systems. Steel coupon-containing vials inoculated with produced fluid from an underground storage well were subject to different headspace conditions to simulate underground gas storage. The vials were filled with geologic natural gas, geologic natural gas amended with hydrogen, RNG, and RNG amended with hydrogen. Each condition was subject to molecular (qPCR, and 16S rRNA analysis), liquid chemistry (sulfate and volatile fatty acid), corrosion, and headspace chemistry (major components and trace sulfur) analysis in duplicate at three time points. The results showed that levels of sulfide production, microbial community composition, and coupon mass loss did not differ greatly between the natural gas and RNG conditions. However, the presence of hydrogen did increase the levels of sulfide in both geologic and RNG conditions. There was also evidence of significant biotransformation of hydrogen into an organic acid (formate). This experiment has shown that microbes native to underground storage wells could have an impact on gas quality and corrosion (via hydrogen sulfide production) if hydrogen is introduced.

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Effects of Silicon Carbide in Corrosion of A36 Gas Shielded Flux Core Welding

Product Number: 51324-21163-SG

Author: Moe A. Rabea; Herbert Wang

Publication Date: 2024

$40.00

Using Gas Shielded Flux Core welding, a butt joint can be analyzed for surface corrosion. The material used with both of these welding processes in this experiment is 1/4-inch A36 Hot Rolled Flat Bar, cut from a single piece, variations of the stock material are minimized. The material is chosen as it is one of the most prevalent material used in many industries that incorporate heavy steel usage. The flat bar measures 3-inch in width, 1/4-inch in thickness, and are cut into 2-inch test pieces. Two pieces form a single test subject, which are welded together. One set of the test pieces are applied with SiC (Silicon Carbide) before the welding process. Both sets are then welded with Gas Shielded Flux Core welding. The final dimension of the test piece is 1/4-inch x 4-inch x 3-inch. The welded pieces are then subjected to corrosion testing in a salt spray chamber and results are observed. The salt spray chamber is controlled at 1 bar pressure with 180L brine reservoir at 5% NaCl concentration. The temperature is held constant at 45 °C with a humidity of 50%. The test pieces will be subjected to this condition for 96 hours. A parallel corrosion test conducted using 1% HCl solution at ambient temperature, 35 °C, 45°C, and 55°C. The samples are initially weighed and placed in the HCl solution for 24 hours. Weight loss from thermal shock from quenching is also conducted. Subjects are heated to a temperature of 250, 300, 350, 400, 450, 500, 550°C and quenched for 15 minutes. The final weight is then taken. Microhardness testing is conducted on the weldments. The conclusion of the test reveals that with the incorporation of SiC powder into the welding process, it resulted in less corrosion (weight loss), less weight loss from thermal shock, and increased microhardness.

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Effects of temperature on hydrogen absorption into steel bars by cathodic charging in solution containing ammonium thiocyanate

Product Number: 51323-18931-SG

Author: Takuya Kamisho, Ryuta Ishii, Masayuki Tsuda

Publication Date: 2023

$20.00

Steel bars used in pre-stressed concrete structures are constantly subjected to tensile stress, and some steel bars have been reported to fracture due to hydrogen embrittlement. It is important to know the hydrogen embrittlement behavior in steel bars to prevent fracture.

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Efficacy Of MIL-DTL-5541 Compliant Non-Chromate Conversion Coating Repair Materials

Product Number: 51322-17625-SG

Author: David G. Enos, Derek Wichhart

Publication Date: 2022

$20.00

Chromate conversion coatings are relied upon to ensure the long-term corrosion performance and surface electrical properties of aluminum alloys, as well as to improve the bond strength and adhesive properties of organic coatings and adhesives. Chromate based chemistries have been all but eliminated in Europe, and it is believed the Environmental Protection Agency (EPA) will stage their elimination in the USA within the next 5 to 10 years. The development of chemistries to replace chromate has been a hot area of research for over 30 years, and now a series of commercial alternatives have become available. These new coatings differ in their chemistry and performance characteristics, as well as their functional limitations, from chromate.

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Efficiency of Cathodic Protection of Stainless Steel in Confined Area - Further Understanding of the Protection Mechanism through Experimental Testing and Modeling

Product Number: 51324-20639-SG

Author: Charles Leballeur; Jean Vittonato; Nicolas Larché; Hervé Marchebois

Publication Date: 2024

$40.00

Cathodic protection (CP) of carbon steel has been extensively studied for structures exposed to the open sea. However, the knowledge and data available for carbon steel cannot be directly applied to stainless steels, especially in the case of confined surfaces that are prone to crevice corrosion. In the context of stainless steels, confined surfaces (such as the contact surfaces of fasteners or valves) are critical zones as crevice corrosion represents the primary failure mode for passive alloys in seawater. With CP, the local potential achieved in confinement areas is highly dependent on various factors, including the actual geometries (crevice gap, length, local pH and Dissolved Oxygen (DO), ohmic drops, etc.). These factors can raise questions about the actual efficiency of CP if the current cannot reach the confined area. Conversely, if sufficient current can reach the confined area, the risk of hydrogen embrittlement (especially for strain-hardened or precipitation hardened alloys) should be taken into consideration. A specific experimental setup has been constructed to characterize the electrochemical behavior of stainless steel in a confined environment and the physicochemical properties of the confined seawater. The results have shown a complete deaeration of the confined seawater under all test conditions, along with an increase of the pH when CP is applied. The tests have also highlighted the significant impact of slight crevice gap variation on the current distribution. Based on the experimental findings, polarization curves representing confined environments have been generated. These curves have been integrated into a finite element model, allowing for the extrapolation of the experimental results to different crevice geometries. After a few centimeters, little to no current should be able to reach the confined surfaces if the crevice gap is inferior to 10µm. However, the risk of corrosion of stainless steels remains limited due to the local CP-induced chemistry at the interface. The CP also mitigates the ohmic drop in the confined area which also tend to reduce the risk of crevice corrosion.

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Electrochemical And Morphological Investigation Of Corrosion Behavior Of Carbon Steel In A Supercritical CO2 Environment With Presence Of H2S.

Product Number: 51322-18005-SG

Author: Yuan Ding, Chin-Hua “Jim” Cheng, Raymundo Case

Publication Date: 2022

$20.00

Supercritical C_O2 storage has been gaining more attention due to its wider application. It is one of the desirable solutions for reducing C_O2 emission, which is an important contributor to the global climate crisis. In other cases, some of the early applications were focused on the oil and gas industry, by using supercritical CO₂ to sequence the mature wells for better production ^[1],[2]. In those environments, C1018 carbon steel was extensively used, due to its good balance of toughness, strength, and ductility as well as its excellent weldability.

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Electrochemical Assessment Of The Influence Of Temperature On The Pitting Corrosion Reistance Of Metallic Materials In Brines

Product Number: 51322-17738-SG

Author: Helmuth Sarmiento Klapper, Sebastian Jesse

Publication Date: 2022

$20.00

Several industrial applications including the chemical industry and oilfield technology involve frequently halide-containing streams at elevated temperatures, that challenge the pitting corrosion resistance of metallic materials. Pitting susceptibility becomes not only a reject criterion for materials selection during the design stages of engineering components used in these applications. It also constitutes a significant limiting factor to the service life of these components once in service. Therefore, the characterization of the pitting corrosion resistance of metallic materials including the influence that operational factors can have on material’s susceptibility is crucial.

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Electrochemical Behavior Of Transmission Pipeline Steels In Supercritical Carbon Dioxide

Product Number: 51322-17592-SG

Author: Zineb Belarbi, Lucas Teeter, Richard E. Chinn, Margaret Ziomek- Moroz, Ömer N. Doğan

Publication Date: 2022

$20.00

High-pressure steel pipeline is a common, cost-effective method for transporting CO₂ from its point of capture to storage sites¹. In pipeline transport systems, CO₂ is mostly transported in its liquid or supercritical phase, depending on the operating pressure^2,3, which requires compression of CO₂ gas to a pressure above 80 bar (Figure 1) and avoid a two-phase flow regime in the steel pipelines. In the USA, the longest CO₂ pipelines, which transport more than 40 MtCO₂ per year from production point to sites in Texas, where the CO₂ is used for enhanced oil recovery (EOR), operate in the “dense phase” mode and at ambient temperature and high pressure.

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Electrochemical Corrosion Analysis Of Stainless Steels In LALM Pyrolysis Bio-Oil With Organic Corrodents

Product Number: 51322-17759-SG

Author: Jiheon Jun, Dino Sulejmanovic, James R. Keiser, Michael P. Brady, Michael D. Kass

Publication Date: 2022

$20.00

Biomass-derived pyrolysis oils (bio-oils) are recognized as a renewable energy source that could
aid in the reduction of fossil fuel use. Bio-oils exhibit higher corrosivity to common ferrous alloys because the oils contain organic acids and water. A series of corrosion studies were previously performed to determine the corrosion rates of ferrous alloys exposed in bio-oils for a quantitative evaluation of the material compatibility. The key information from these previous studies is that ferrous alloys with more Cr, Ni, and Mo are needed for compatibility with bio-oils.

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Electrochemical Corrosion Studies of Different Alloys and Cement Lining Material of Water Transmission system

Product Number: 51323-19203-SG

Author: Ali Al-Sahary, Fatma Al-Radhi, Abdulrahman Al-Enezi, Nausha Asrar

Publication Date: 2023

$20.00

Saline Water Conversion Corporation (SWCC) is the largest producer of water by its different water desalination plants distributed around the kingdom. Produced water is transmitted through underground pipelines. These pipelines are more than 8,000 KM in length and varying diameter from 8 thru 75 in.

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Electrochemical Evaluation of the Localized Corrosion Susceptibility of Ni Based Precipitation Hardening Alloys in Supercritical Sour Gas Service Conditions

Product Number: 51324-20426-SG

Author: Raymundo Case; Lei Zhao; Yuan Ding; Jason Ren; Tin Dunne

Publication Date: 2024

$40.00

This study evaluates the susceptibility to localized corrosion of alloys UNS N06625 and N07725 in both supercritical and subcritical CO2 with H2S present. Electrochemical experiments were performed at 200 °C, with CO2 present in both supercritical at 1500 psi and sub critical (450 psi) conditions, the H2S content was up to 10% mol and chloride concentration in the brine up to 25000 ppm, the test are performed with 1 g/l of S. The results in this study, indicate that the performance of both alloys in supercritical CO2 phase with H2S, show an extremely high anodic dissolution rate. This behavior is attributed to the formation of NiCO3 and NiS. The H2S content within the supercritical CO2 phase can support a high cathodic reaction rate through the S reduction reaction, which is incorporated in the passive layer to form Ni sulfides, this creates a passive layer susceptible to pitting at high Cl- content.

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Electrochemical Investigation and Modeling of Cathodic Reactions on Iron Sulfides in Acidic Solutions

Product Number: 51323-19428-SG

Author: Payman Sharifi Abdar, Bruce Brown, Srdjan Nesic

Publication Date: 2023

$20.00

H2S corrosion, also known as sour corrosion, is a very serious type of metal degradation in oil and gas transmission pipelines. When H2S is present in an operating pipeline, localized corrosion is the type of attack which contributes to the most failures in oilfields, consequently, its impact on the economics of oil and gas production is indisputable. Therefore, mitigation of this type of corrosion could prevent such failures and significantly enhance asset integrity while reducing maintenance costs as well as eliminating environmental damage.

AMPP Conference Papers

Association for Materials Protection and Performance