AMPP Store - Individual Conference Papers

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Interfacial and Corrosion Characterization of Zinc Rich-Epoxy Primers with Carbon Nanotubes Exposed to Marine Bacteria

Product Number: 51317--9465-SG

ISBN: 9465 2017 CP

Author: Homero Castaneda-Lopez

Publication Date: 2017

$20.00

In this work, a marine environment due to the presence of marine bacteria was exposed to three zinc-rich epoxy coated-steel samples with different carbon nanotube additions. The electrochemical activity was monitored by using open circuit potential and electrochemical impedance spectroscopy.

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Interference Study between a Solar Array Power Station and a Transmission Pipeline

Product Number: 51324-21051-SG

Author: Andres Peratta; Cristina Peratta; John Baynham; Nora Villamizar Piñeros; Didier Lozano Abril

Publication Date: 2024

$40.00

It is nowadays becoming increasingly common for new onshore structures and electrification systems to be installed in close vicinity to existing underground pipelines already equipped with their own CP and earthing systems. The problem with sharing common right of way between different structures is that their different earthing and CP systems are likely to interfere with each other. The coupling may reduce the performance of the individual designs or lead to major problems such as stray currents or shielding effects. Numerical modelling of these types of scenarios allows identifying such problems in advance, gaining understanding on the nature of the interference, and evaluating possible mitigation strategies. In this work the impact of constructing a solar power station across a set of transmission pipelines is investigated. The pipelines are protected by an ICCP system. The solar array includes galvanized piles and copper earthing system. The territory is mainly composed of clays or muds with flat and slightly undulating shapes with average resistivities in the order of 900 O-cm. Simulation results are presented showing the status of the pipelines before and after the solar array is constructed, as well as the solar array considering that the pipeline does not exist. The results show that the solar array piles and earthing system have measurable effects on the CP potentials on the pipeline.

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Intergranular Oxidation and Oxygen Transport in Ni-20Cr During Exposure to Model Dry and Wet Oxidation Environments

Product Number: ED22-17329-SG

Author: Martin Weiser, Daniel K. Schreiber, Karen Kruska, Mark H. Engelhard, Matthew J. Olszta

Publication Date: 2022

$20.00

The austenitic Ni-base Alloy 600 has been extensively used as structural material in primary water reactors (PWR). Despite good resistance against general corrosion in water-cooled nuclear power reactors, the material has been susceptible to stress corrosion cracking (SCC). These observations have led to ongoing discussions of the underlying embrittlement mechanism(s). Internal oxidation of the grain boundary (GB) at typical operating temperatures is one such mechanism, although debate continues on the exact mechanisms at play.

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Intergranular Oxidation Of Unstressed Alloy 600 SA And Alloy 600TT In PWR Primary Water

Product Number: ED22-17279-SG

Author: Daniel K. Schreiber, Karen Kruska, Matthew J. Olszta, Peter H. Chou

Publication Date: 2022

$20.00

Alloy 600 (Ni-16Cr-9Fe) is well known to exhibit intergranular corrosion and intergranular stress corrosion cracking (IGSCC) upon exposure to high temperature water environments, including those found in service environments of pressurized water reactors (PWR). While the higher Cr content alloy 690 exhibits superior IGSCC resistance in these environments, alloy 600 is still in use at many light water reactor plants. Part of the difficulty in assessing alloy 600 performance is the significant variability in behavior from heat to heat, both from the standpoint of initial alloy chemistry and the subsequent thermomechanical treatment of the material.

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Intergranular Stress Corrosion Cracking (IGSCC) of Carbon Steel Equipment

Product Number: 51323-19173-SG

Author: Duane Serate, Simon Yuen, Yashar Behnamian, Jeffrey Venezuela

Publication Date: 2023

$20.00

At the time of a recent maintenance shutdown, cracking was discovered in the repads and parent material in the vicinity of several nozzles along the bottom of two in-situ production treater vessels. Some of the cracks were reported to be through-wall. The vessels were commissioned in 2009 and had been in service for about 13 years before the cracks manifested as through-wall.

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Internal Corrosion in Natural Gas Pipelines

Product Number: 51323-19507-SG

Author: Christopher A. Walker

Publication Date: 2023

$20.00

Corrosion is defined as the degradation of a material or its properties due to a reaction with the environment and is one of the most common pipeline integrity threats for operators. External corrosion may be visually inspected during excavation; however, due to accessibility, additional non-destructive examination (NDE) methods must be utilized to identify the presence and severity of internal corrosion.

Understanding the chemistry and electrical properties of how corrosion occurs aids in mitigating the presence of corrosion, specifically internal corrosion.

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Internal Corrosion of Copper-Nickel Alloys Tubes 90/10 and 70/30 in Chlorinated Seawater for Heat Exchangers

Product Number: 51319-13338-SG

Author: Dominique Thierry

Publication Date: 2019

$20.00

The corrosion resistance of copper-nickel 90/70 and 70/30 tubes for heat exchangers was evaluated in 0.5 ppm-chlorinated seawater under controlled service conditions in bespoke test loop. Copper-Nickel 90/10 tubes were tested with two different geometries: internal smooth surface and internal finned surface (helix geometry). Internal pitting corrosion resistance was evaluated under two controlled heat fluxes from the internal and the external parts of the tubes for 6 months at 65°C(Tskin-out)/50°C(Tskinin)/35°C(Tseawater) and 105°C(Tskin-out)/70°C(Tskin-in)/35°C(Tseawater). For all the tested copper alloys the uniform corrosion was extremely low and negligible. For both heat fluxes CuNi 90/10 was globally more resistant to localized corrosion than CuNi70/30. The most corrosion resistant configuration was the CuNi 90/10 with the finned internal geometry. The best corrosion resistance compared to the smooth geometry might be attributed to different hydrodynamic conditions at the seawater/metal interface.

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Internal Corrosion of Flare Header - A Case Study

Product Number: 51324-21201-SG

Author: Ayman A. Alabdullatif; Lay Seong Teh; Hatam Mehraz; Anaam H. Shaikh Ali

Publication Date: 2024

$40.00

In a major gas-oil separation plant (GOSP) in Saudi Arabia, a major flare header suffered from severe internal corrosion. Upon analyzing the scale and sludge that was found accumulated in the line, a significant proportion of elemental sulfur was identified. This indicated that in addition to hydrogen sulfide and water (which were expected to be present in the line), significant amount of oxygen was also present. An investigation was conducted to identify the source of this oxygen and to eliminate it. Other critical factors that impacted the internal corrosion were also identified. The line was not properly sloped to drain accumulated moisture. Knock-out boot levels were often high and not regularly drained. In addition, purge gas was not operated at rates adequate to sweep any accumulated liquids. All of these factors combined led to an accelerated deterioration of the header.

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Internal Corrosion of L80 Tubing in Permian Basin Oil and Gas Wells-Case Studies (Lab Study)

Product Number: 51323-18892-SG

Author: Suresh Divi, Michael Newman

Publication Date: 2023

$20.00

The Permian Basin is an oil-and-gas-producing area located in West Texas and the adjoining area of southeastern New Mexico. The Permian Basin covers an area approximately 250 miles wide and 300 miles long and is composed of more than 7,000 fields (best represented in Railroad Commission of Texas production figures as districts 7C, 08, and 8A) in West Texas.1 The greater Permian Basin accounts for nearly 40 percent of all oil production in the United States and nearly 15 percent of its natural gas production.

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Internal Corrosion Prevention During Hydrostatic Testing and Wet Layup of Pipelines: Approach and Case Study

Product Number: 51324-20594-SG

Author: Susmitha Purnima Kotu; Christopher Kagarise; Richard Bruce Eckert

Publication Date: 2024

$40.00

The introduction of water and the absence of flow during hydrostatic testing or layup of pipelines can lead to internal corrosion, making corrosion control a critical concern. Various corrosion mechanisms may be active, including microbiologically influenced corrosion (MIC), under deposit corrosion (UDC), and oxygen corrosion, depending on the service and operating conditions of the pipeline. Chemical treatment is typically used to control corrosion during hydrotesting or layup, but it must be targeted at the applicable corrosion mechanisms and remain effective over the duration of hydrostatic test or layup period. Additionally, the applied chemical treatment must reach metal surfaces susceptible to corrosion. This paper highlights the approach for selection of appropriate mitigation strategy for internal corrosion prevention as part of hydrostatic testing and wet layup. This paper also presents two case studies that illustrate the processes used to identify likely corrosion mechanisms and perform laboratory studies to examine the effects of various chemical mitigation solutions for hydrostatic testing and wet layup.

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Internal Corrosion Risk Assessment for Crude Pipeline-D - A Case Study

Product Number: MECC23-19965-SG

Author: Ayman A. Alabdullatif; Rakan A. Al-Shebil; Ahmad S. Al-Otaibi; Faisal M. Al-Abbas; Omar A. Al-Saif

Publication Date: 2023

$20.00

Pipeline-D was built in 1997 and was used to transport crude to Gas-Oil Separation Plant-1 (GOSP-1). The pipeline continued operating until it was subjected to intermittent shutdown in 2009 when GOSP-2 was built. As part of the project, 900 meters were added to connect Pipeline-D to GOSP-2.

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Internal Corrosion Threat Assessment Using Operational Data and Comparison with ILI Results

Product Number: 51315-6001-SG

ISBN: 6001 2015 CP

Author: Dharma Abayarathna

Publication Date: 2015

$20.00

Individual Conference Papers

Association for Materials Protection and Performance