Microbiologically influenced corrosion of 70/30 cupronickel tubes of a heat-exchanger

Chandra, K.; Mahanti, Amrita; Singh, Ajay; Kain, Vivekanand; Gujar, H.G.

doi:10.1016/j.engfailanal.2019.08.005

Cited by 22 publications

(4 citation statements)

References 11 publications

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“…Additionally, high humidity in the heat exchanger, caused by the presence of seawater inside the tube and hydrocarbon vapor outside, accelerated the corrosion rate of the tubes. Detailed reactions of patina formation and the color changes can be explained by reactions 2,8,15) :…”

Section: Figmentioning

confidence: 99%

“…Heat exchangers play a critical role in transferring heat between a source and a working fluid to achieve the desired temperature, serving in both cooling and heating processes. As a result, factors such as pressure, temperature, and environmental considerations like corrosion and oxidation are implicated in strength degradation [7][8][9][10][11] . The investigation found that two heat exchanger tubes had leaked, rendering them inoperative and necessitating the shutdown of the entire system.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Structural Strength Degradation of Oil and Gas Refinery Equipment. Case Study: Heat Exchanger Tubes of Hydrocarbon Vapor

Suhadi,

Aprilio,

Febriyanti

2023

Evergreen

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Heat exchangers, crucial equipment in oil and gas refinery facilities, play a pivotal role in ensuring reliable energy production. Any structural issues with these heat exchangers can disrupt production and potentially lead to energy supply interruptions. The aim of this research is to investigate the degradation of structural strength in heat exchangers that occurs during their operational lifespan. Several tests, including hardness, metallography, chemical analysis, tensile testing, and SEM analysis, were conducted to assess the condition of the heat exchanger tubes. The results revealed that the tubes had become coated with deposits that reacted with the tube walls, resulting in rust formation. Consequently, the walls of the tubes underwent thinning, ultimately leading to leaks. In conclusion, the structural strength degradation of the heat exchanger tubes was primarily caused by corrosion occurring beneath these deposits.

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Section: Figmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Structural Strength Degradation of Oil and Gas Refinery Equipment. Case Study: Heat Exchanger Tubes of Hydrocarbon Vapor

Suhadi,

Aprilio,

Febriyanti

2023

Evergreen

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“…However, despite the excellent performance of the alloy, failure occurs in marine environments wherein Cl − ions are present [11,12]. Materials used in modern industries, such as wind power generators and offshore plants, require high corrosion resistance and need to be used for a long duration in severe environments [13,14].…”

Section: Introductionmentioning

confidence: 99%

Aluminum Co-Deposition via DC Magnetron Sputtering for Enhanced Pitting Resistance of Copper–Nickel Alloys

Yun,

Kim,

Lee

et al. 2024

Coatings

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To investigate the improvements in the resistance of Cu–Ni alloys to surface pitting corrosion, Cu–Ni thin films containing Al were fabricated via DC magnetron sputtering. The morphologies of the fabricated samples were obtained using a scanning electron microscopy, which yielded information on the crystal size and sample surface before and after corrosion tests. X-ray diffraction was employed for the structural characterization of the as-deposited films, and vibrational spectroscopy was used to verify the corrosion products. The corrosion behaviors of the Cu–Ni and Cu–Ni–Al samples were examined using electrochemical polarization and cyclic corrosion tests. The Al co-deposited samples showed a refined crystal size as compared to the Cu–Ni sample, suggesting that they are more susceptible to the formation of a passivation film. The corrosion current density of the Cu–Ni–Al was reduced, and the corrosion potential was lower than that without Al content. The negative shift in the corrosion potential of the Al-containing samples indicates that the Al2O3 film suppressed the cathodic reaction, resulting in a decrease in the corrosion rate. These results are consistent with the cyclic corrosion test results, in which no pitting corrosion is observed in the Cu–Ni–Al sample.

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“…Most MIC studies focused on MIC pinhole leaks (Chandra et al, 2019;Dao et al, 2021). More attention should be paid to deterioration of mechanical properties of steels, including reductions of tensile strength and strain (Li et al, 2021a;Li et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Mitigation of microbial degradation of X80 carbon steel mechanical properties using a green biocide

Yang

et al. 2023

Preprint

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Most microbiologically influenced corrosion (MIC) studies focus on the threat of pinhole leaks caused by MIC pitting. However, microbes can also lead to structural failures. Tetrakis hydroxymethyl phosphonium sulfate (THPS) biocide mitigated the microbial degradation of mechanical properties of X80 pipeline steel by Desulfovibrio ferrophilus, a very corrosive sulfate reducing bacterium. It was found that 100 ppm (w/w) THPS added to the enriched artificial seawater (EASW) culture medium before incubation resulted in approximately 3-log reduction in sessile cell count after a 7-d incubation at 28oC, leading to 94% weight loss reduction. The X80 dogbone coupon incubated with 100 ppm THPS for 7 d suffered only 3% loss in ultimate tensile strain and 0% loss in ultimate tensile strength compared with the abiotic control in EASW. In comparison, the no-treatment X80 dogbone suffered losses of 13% in ultimate tensile strain and 6% in ultimate tensile stress, demonstrating very good THPS efficacy.

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Microbiologically influenced corrosion of 70/30 cupronickel tubes of a heat-exchanger

Cited by 22 publications

References 11 publications

Structural Strength Degradation of Oil and Gas Refinery Equipment. Case Study: Heat Exchanger Tubes of Hydrocarbon Vapor

Structural Strength Degradation of Oil and Gas Refinery Equipment. Case Study: Heat Exchanger Tubes of Hydrocarbon Vapor

Aluminum Co-Deposition via DC Magnetron Sputtering for Enhanced Pitting Resistance of Copper–Nickel Alloys

Mitigation of microbial degradation of X80 carbon steel mechanical properties using a green biocide

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