AMPP Store - Products tagged with 'pitting'

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An Expanded Characterization of Environmental Severity for Naval Air Stations

Product Number: 51324-20665-SG

Author: Steven Kopitzke; Ian Long; Alexander Lilly; Kaylee Canales; Allison Muenzer

Publication Date: 2024

$40.00

Characterizing the risk of corrosion due to environmental severity is critical when developing condition-based maintenance practices, planning facility maintenance or developing predictive corrosion models. In light of that, a research study was conducted to characterize and rank the environmental severity of Naval Air Stations across the world. In addition, the research team utilized the most recent recommendation for environmental severity assessment from the AMPP SC-07 committee as a secondary effort in this study. This report will describe both the environmental severity rankings of the sites along with evaluating the effectiveness of the SC-07 recommendations.

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Analysis of Pitting Susceptibility of Low Carbon Steels for the Refinement of Salt Dissolution Inhibitor Requirements

Product Number: 51323-19293-SG

Author: Joshua T. Boerstler, Bruce J. Wiersma, Keisha B. Martin, Andrea N. Bridges

Publication Date: 2023

$20.00

At Savannah River Site (SRS), High-Level Waste is stored in below-grade tanks constructed of carbon steel. This waste is composed of sludge, salt cake, and/or supernate. In part, preparation of this waste for future processing involves dissolution of the salt cake layer.

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Characterization of Stress-Corrosion-Cracking in Plutonium-Bearing Storage Containers

Product Number: 51324-20845-SG

Author: Emmanuel Perez; Roderick E. Fuentes; Michael J. Martínez-Rodríguez; Henry Ajo

Publication Date: 2024

$40.00

The Integrated Surveillance Program, under the Department of Energy, is responsible for the periodic surveillance of storage containers containing plutonium-bearing materials. The container-package consist of a stainless-steel three-layered structure with a convenience can that confines the material, and seal-welded inner and outer cans designed to isolate the materials for up to 50 years with minimal surveillance. The inner-can represents the first layer of material containment, and it should not be breached. During monitoring, corrosion-pitting and suspected stress-corrosion-cracking (SCC) has been identified in some of the inner cans near the weld regions due to the transport of chloride salts and water impurities into the space between the convenience can and the inner can. SCC through wall penetration would result in an undesired increased risk of leakage. An investigation is in progress to identify and characterize corrosion events in the inner-cans to determine the prevalence of corrosion features and the likelihood of a through-wall breach. This document presents a specimen where significant pitting corrosion and cracking was observed in and near the heat affected zone between the can and the lid. Characterization was carried out by Scanning Electron Microscopy (SEM) and 3D-tomography. Tomography was carried out using a Focused Ion Beam (FIB) to mill into the surface of the specimen to map the subsurface topographies of pits and cracks. The study revealed the crack depth and secondary cracks that developed from cracks observed at the surface.

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Characterizing Corrosion On AA-7075 Through Alternative Cleaning Methods And Optical Profilometry

Product Number: 51322-17579-SG

Author: Steven Kopitzke, Karla De Jesus Santiago, Rachel Black

Publication Date: 2022

$20.00

Measuring the severity of corrosion on a specific alloy is often accomplished via mass loss using ASTM G-1. These processes work well and provide high fidelity data for many materials, especially steels. However, recent internal findings and disclosures from other research groups have highlighted a potential issue with using mass loss techniques to measure the damage on some aluminum alloy surfaces.

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Comparison Of CPT-Values Of UNS N08935, UNS N06625, UNS N06455 And UNS N06985 By Use Of A New Electrochemical Method

Product Number: 51321-16665-SG

Author: Anna Delblanc; Nian Zhou

Publication Date: 2021

$20.00

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Corrosion Challenges in Aromatic Extraction Unit

Product Number: MECC23-20253-SG

Author: Ameer Hamza; Rakan M Samman

Publication Date: 2023

$20.00

Extraction units are typically utilizing the solvents to dissolve the aromatics compounds such as benzene, toluene, and xylenes from hydrocarbon stream. These solvents are organo-sulfur compound which is readily soluble in the water due to high polarity of oxygen-sulfur compounds.

Fresh solvents are not considered to be corrosive for carbon steel and stainless-steel components, however improper application and handling of this solvents will result in degradation of this products.

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Corrosion Of Wrought And Cast Ni-Fe-Cr-Mo Alloys In High-Temperature Brines And CO2-Rich Supercritical Phases With Oxygen And Hydrogen Sulfide

Product Number: 51322-17882-SG

Author: Manuel Marya

Publication Date: 2022

$20.00

Carbon dioxide capture, utilization, and storage (CCUS) is part of decarbonization solutions to reduce green-house gas emissions, as exemplified by the growing number of capital expenditure projects worldwide.^1-2 In CCUS, the carbon dioxide (CO₂) is consecutively (1) captured at origin, such as power plants and natural gas production sites, (2) separated from other gases and impurities, (3) compressed, (4) transported through pipelines, and finally (5) injected into a storage site such as deleted hydrocarbon wells, saline aquafers, coal beds, underground caverns, or seawater.^1,3 Since the 1970s, specifically the first commercial carbon dioxide flooding in the United States (known as SACROC), carbon dioxide sequestration has been largely discussed in the context of enhanced oil recovery (EOR), not in the newer context of Sustainability. Nonetheless, substantial experience has been drawn from EOR, including for the selection of the right and economical materials.⁴ As reflected by the literature, past materials test programs have rarely given any attention to downhole jewelry alloys compared to tubulars or surface-infrastructure alloys, and consequently the track records for such bar-stock alloys are either inexistent or not readily available. ^5-7 This lack of apparent return-on-experience represents a knowledge gap against the prospect of a safe greenhouse gas control method; needless to say, it also justifies the requirements for reliable well integrity monitoring solutions in carbon dioxide sequestration wells.^8-9

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Corrosion Resistance Evaluation Of Super Duplex Stainless Steel In Supercritical CO2 Saturated Liquid Phase Containing Impurities O2 Or SO2

Product Number: 51322-17602-SG

Author: Daisuke Matsuo, Masayuki Sagara, Yuji Arai, Hisashi Amaya, Kyohei Kanki

Publication Date: 2022

$20.00

Carbon capture, utilization and storage (CCUS) is one of the key technologies to achieve the net-zero emission. One of the CCUS method is CO₂ injection to depleted oil and gas wells or aquifers and storage (CCS). The CO₂ emitted from fossil fuel-based powers and industrial plants are captured and transported to the injection point by ships or pipe line. Following that, the dense phase or supercritical phase CO₂ will be injected to depleted oil and gas wells or aquifers through oil country tubular goods, for examples, seamless pipe.

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Corrosion Resistance of Duplex Stainless Steels for CCS Application under the Liquid Phase in Equilibrium with Supercritical CO2 Containing Slight Amount of O2

Product Number: 51324-20598-SG

Author: Kyohei Kanki; Daisuke Matsuo; Yuji Arai; Hisashi Amaya

Publication Date: 2024

$40.00

In carbon dioxide capture and storage, CO2 emitted from various industries containing impurities is captured and injected underground in dense or supercritical phase through tubings. In order to evaluate corrosion resistances of materials in the supercritical CO2 with a slight amount of O2, corrosion tests were performed under the conditions of 5 mass% NaCl equilibrium with CO2, containing with the various amount of O2 at total pressure of 130 bar and 100 °C. Super Martensitic Stainless Steel (UNS S41426), Duplex Stainless Steel (UNS S82551), and Super Duplex Stainless Steel (UNS S39274) were evaluated. Localized corrosion was observed in S41426 at conditions higher than 200ppm O2 (0.026 bar O2 partial pressure) condition. On the other hand, S82551 and S39274 showed good corrosion resistance in the same condition. As for S82551, it suffered from localized corrosion at 1000ppm O2 (0.13 bar O2) condition. However, in the actual O2 concentrations, it is considered that S82551 and S39274 are suitable materials even if formation water flow back has occurred.

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Cyclic Polarization and Electrochemical Impedance Techniques to Rapidly Screen and Assess Pitting Tendencies of Corrosion Inhibitor Actives in Carbon Steel

Product Number: 51323-19389-SG

Author: Yolanda De-Abreu, Ana Ferrer, Geeta Rana, Sherman Kung

Publication Date: 2023

$20.00

Corrosion inhibitors (CI) are typically evaluated using either short-term electrochemical methods or long-term weight loss methods in laboratory set up. Although electrochemical methods provide fast and real-time corrosion information, corrosion subject matter experts, in general, rely on long term weight loss methods to determine localized corrosion information. These long-term methods include exposure of the metal coupon in a corrosive media under specific field conditions/parameters such as temperature, pressure, wall shear stress, corrosive gas species and test length in the presence of corrosion inhibitor active(s).

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Development and Testing of a Mechanistic Based Atmospheric Corrosion Prediction System

Product Number: 51323-18962-SG

Author: A.R. Trueman

Publication Date: 2023

$20.00

The work here is the culmination of many years of prior effort in the development of an atmospheric corrosion model and accompanying sensors. Atmospheric corrosion is a complicated process where many factors interact to determine if it occurs and its severity. These factors can be separated into
three general categories: environmental, surface salts, and materials.

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Development of 27–7MO: An Improved Superaustenitic Stainless Steel With High Strength and Excellent Corrosion Resistance for Sour Service

Product Number: 04114-SG

Author: N.C. Eisinger, J.R. Crum, B. C. Puckett

Publication Date: 2004

$20.00

Material selection for downhole applications has become more difficult as the number of alloys continues to increase. On one hand, stainless steels like 316 offer a relatively low initial cost, but are not suited for many severe applications or environments. Other alloys, like MP35N, offer considerable strength and corrosion resistance, but with a much higher cost. Thus, an attempt has been made to create an alloy that spans the considerable gap between the 300 series of stainless steels and the nickel or cobalt base alloys. The resulting 6% Mo stainless steels offered increased strength and corrosion resistance without a drastic cost increase. The first generation of superaustenitics still falls considerably short of the strength and corrosion resistance provided by established nickel or cobalt-base alloys. In an attempt to further bridge the remaining gap, a new superaustenitic stainless steel has been developed that maintains the attractive cost of the 6% Mo alloys, but enhances both corrosion resistance and strength to open up environments that were too severe for 6% Mo alloys. The development of this alloy along with localized corrosion resistance, qualification testing, and mechanical testing are discussed.

Products tagged with 'pitting'

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