AMPP Store - Products tagged with 'atmospheric corrosion'

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Effect Of Relative Humidity And Galvanic Couples On Stress Corrosion Cracking Of High-Strength Aluminum Alloys

Product Number: 51322-18015-SG

Author: L. Agnew, B. Clark, V. Avance, F. Friedersdorf

Publication Date: 2022

$20.00

High-strength aerospace aluminum alloys, such as AA7075-T651, are susceptible to environmental assisted cracking (EAC) under the right combinations of stress, environment, and microstructure. EAC presents a serious risk to structures and equipment operated in corrosive conditions. Studies of EAC in aluminum alloys have highlighted the importance of both anodic dissolution and hydrogen embrittlement to EAC initiation and propagation.^1–4 The EAC response of alloys under variable atmospheric conditions is of particular importance for assessing material performance for aerospace applications.

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Electrodeposited Nanolaminar Zinc-Nickel Alloy Coatings – Analysis of Advanced Corrosion Resistance Performance

Product Number: 51323-19204-SG

Author: Herman E Amaya, Timm Burnett, Richard Morgan, Vikas Joshi

Publication Date: 2023

$20.00

Nanolaminar or nanostructured zinc-nickel electrodeposited coatings are compliant with the composition requirements of ASTM B841 and F1941 (12 to 16% Ni: balance Zn). The term nanolaminar refers to the successive thin layered deposition of nanostructured grains (≈ 25nm); accomplished by modulating the electrodeposition into a waveform applied at defined time periods and varying current densities. Standard electroplating in contrast, applies a continuous DC current throughout the electrodeposition process, resulting in grains that while initially fine will coarsen as a function of thickness ranging to the micrometer range.

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Environmental Modification And Atmospheric Corrosion: Clear Water Rinsing, Covering, And Seawater Spray

Product Number: 51322-17990-SG

Author: Christine Sanders, Raymond Santucci, Jr

Publication Date: 2022

$20.00

Aerospace assets are subjected to routine maintenance cycles to prevent, monitor, and repair corrosion damage. Currently, the maintenance cycles are determined according to its model and following its respective requirements document (eg: NA(1) 01-1A-509¹ or USAF(2) Technical Order 1-1-691).² A new paradigm of condition-based maintenance (CBM) is highly desired, as a given asset will require different prevention, monitoring, and repair maintenance cycles depending on where it is deployed. As corrosion is the degradation of a material in response to its environment, CBM takes into consideration the variability of the environment (the conditions to which an asset is exposed) when determining appropriate maintenance intervals and what should be done at each interval.

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ESG and PHMSA’s Mega Rule Have Necessitated Advancements in Hydrotesting and Abandonment of Offshore and Onshore Pipelines

Product Number: 51323-18982-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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Examination of Corrosion Sensor Data from Long-Term Field Exposures

Product Number: 51323-19446-SG

Author: James Dante, Shengyen Li, Andrew Keller

Publication Date: 2023

$20.00

To reduce maintenance costs while maintaining safety, different corrosion mitigation strategies have been utilized. In addition to new structural materials and advanced protective coatings, improved maintenance planning approaches, including Condition Based Maintenance (CBM) approaches, have seen growing use over the past decade. One goal of any Condition Based Maintenance (CBM) effort is to use all available on-aircraft data as well as field and depot-based maintenance information to align resources in a timely manner to ensure aircraft safety while reducing maintenance and repair costs.

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Experimental Design Considerations for Exposure of Surrogate Fe in Assessing Atmospheric Corrosion in a Marine Environment

Product Number: 51324-21077-SG

Author: Alexander Johnson; Christine Sanders; Raymond Santucci; Sheri Stanke

Publication Date: 2024

$40.00

A rigorous assessment of marine atmospheric corrosion at a controlled NRL test site in Key West Florida was conducted. Certain factors which have been previously implicated in the literature as controlling, or at least heavily influencing, the corrosion of engineering materials in atmospheric exposure were isolated and explored. In this study, low carbon steel witness coupons were exposed to assess atmospheric corrosion. In particular, the effect of steel alloy type, coupon width, location, and exposure condition were tested. Coupons were exposed under ambient condition, sprayed with sea water, or rinsed with clear water. Results were assessed in terms of steel mass loss. Several important findings relevant to experimental design of atmospheric corrosion were assessed. Coupons treated with sea water experienced substantially greater corrosion rates compared to coupons exposed ambiently. Samples rinsed with clear water experienced lesser corrosion rates compared to ambiently exposed samples. Furthermore, corrosion rate differed by location: coupons exposed closer to the salty ocean water experienced greater corrosion compared to ones exposed further inland. Coupons with a thinner width also had greater area-normalized corrosion compared to wider coupons. The results of this study will benefit the entire atmospheric corrosion community since it establishes what the best practices are for exposure.

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Gearbox Corrosion Mitigation During Storage and Intermittent Operation

Product Number: 51324-20747-SG

Author: Pavlo Solntsev; James Holden

Publication Date: 2024

$40.00

Gearboxes are one of the most critical pieces of equipment in a plant. Downtime because of gearbox failure can significantly impact manufacture and be very costly. An additional inventory of spare gearboxes is needed to minimize the effect of the loss. All gearboxes operating and during storage are susceptible to corrosion due to moisture condensation on the metal surfaces. The work describes oil additives that protect gearboxes during operation, layup, and warehouse storage. As was proved, the corrosion can be mitigated by adding a Vapor Corrosion Inhibitor (VCI) to the system. The testing methodology to verify the effectiveness of the oil additives, as well as compatibility with the base oil, was presented. Based on the present work, a specification for gearbox preservation during storage was developed.

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Global Corrosivity Rates Based on Open-Source Climatic Data

Product Number: 51323-19323-SG

Author: Sergiu Paereli, Anders W. B. Skilbred, Andreas Krapp

Publication Date: 2023

$20.00

Low alloyed carbon steels are the most used materials for infrastructure, energy, transportation and other industries and assets. Depending on the environment, carbon steel will corrode when exposed to atmospheric conditions. In order to prevent atmospheric corrosion of the mentioned materials, corrosion protective coatings are used.

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Infrastructure Corrosion Issues and Solutions on Military Bases

Product Number: 51317--9212-SG

ISBN: 9212 2017 CP

Author: Vinod Agarwala

Publication Date: 2017

$20.00

Many hangars, shelters and silos used for storage of military weapons systems are several decades old and have started to show signs of aging and corrosion assisted damage of support structures. Case study.

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Metal, Moisture, and Mystery: The Curious Case of the Corroding Phone Charger Pin

Product Number: 51324-21155-SG

Author: Anil Kumar Chikkam; Mehrooz Zamanzadeh; Aaron Ulmer

Publication Date: 2024

$40.00

In metal-based electrical devices, corrosion poses a significant challenge and can be instigated by numerous factors such as moisture exposure, contact with salts and chemicals, and the occurrence of galvanic corrosion when different metals interact in an electrolyte-rich environment. Manufacturing defects, including substandard materials or insufficient protective coatings, can also contribute to corrosion. To combat this, it's essential to uphold cleanliness and dryness, conduct regular gentle cleaning to eradicate potential corrosive substances, and store the devices appropriately in cool, dry areas. The paper interestingly explores this phenomenon, with a case study focusing on the corrosion of a specific pin in a Phone charger as compared to the other seven pins on the same side of the charger.

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Multiplexed Sensor Array for Accurate Time-of-Wetness (TOW) Measurement

Product Number: 51317--9370-SG

ISBN: 9370 2017 CP

Author: Nathaniel Sutton

Publication Date: 2017

$20.00

In this work, we use electrochemical impedance spectroscopy (EIS) to observe the response of a single interdigital transducer (IDT) sensor to different wetting conditions, including electrolyte volumes and concentrations. Deliquescence of solid salt particles in a dynamic-humidity atmosphere is examined.

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Nanolaminar Nickel-Cobalt Coatings: a Revolution in Wear and Corrosion Resistance

Product Number: 51324-20660-SG

Author: Marie Li; Herman E Amaya; Steve Brunst

Publication Date: 2024

$40.00

In the demanding environments of the oil and gas industry, the need for superior protective coatings is paramount. This paper explores electrodeposited nanolaminar Nickel-Cobalt (Ni-Co) coatings as a robust solution. Distinguished from traditional offerings, these coatings provide enhanced hardness, wear resistance, and corrosion protection. These qualities make Ni-Co coatings ideal for rigorous applications, including downhole tools, deep-sea equipment, and chemical processing apparatus. Our investigation underlines the crucial role of the unique nanostructure, obtained via specialized electrodeposition techniques, in augmenting the coating properties. The paper also establishes a comparison between Ni-Co coatings and Zinc-Nickel coatings, drawing attention to their distinctive use cases in the industry. While Zinc-Nickel coatings excel in atmospheric or offshore corrosion protection, Ni-Co coatings outperform in more demanding environments requiring stronger mechanical properties and specific corrosive resistance. Characterizing data supporting the exceptional performance of Ni-Co coatings will be presented. By delineating these advancements, the paper underscores the potential of nanostructured Ni-Co coatings to transform equipment protection strategies in the oil and gas sector.

Products tagged with 'atmospheric corrosion'

Association for Materials Protection and Performance