AMPP Store - Products tagged with 'nickel'

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Air Cooler Plug Gaskets Leakage During Startup

Product Number: 51320-15197-SG

Author: Cathleen Shargay, Sarah Radovcich, Amish Jani, Kuntak Daru, Jigneshkumar J. Desai

Publication Date: 2020

$20.00

Severe leakage on a high percentage of the plug gaskets on a high alloy air cooled heat exchanger during or shortly after initial startup has occurred in only a small percentage of air coolers, but has resulted in costly replacements and unit shutdowns. These problems have occurred with 304L stainless steel (SS), 316L SS and Nickel 200 gaskets, although each material also has many successful applications. The contributing factors to the leakage has included corrosion, galling and/or inadequate manufacturing steps. This paper summarizes a number of case histories and gives their root causes and solutions. The pros and cons of various gasket materials and design options are discussed, along with a proposal for additional requirements to be added to industry standards which would minimize the risks of these problems.

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Applying Lessons from Welding to Large Scale Metal Additive Manufacturing

Product Number: MPWT19-15370

Author: Michael Kottman, Mark Douglass, Badri K. Narayanan

Publication Date: 2019

$0.00

Direct energy deposition processes that utilize wire feedstock have been deployed to deposit and fabricate near net shape functional metal parts at high deposition rates. Is this just multi-pass welding or is there more to it? Should the material requirements for additive be the same as those defined for welding? Is weld quality the same as part quality? A large metal additive part fabricated using a robotic wire arc additive system will be used to demonstrate the similarities and identify critical differences between essential variables for welding and additive manufacturing. The opportunities for both welding and additive manufacturing to learn and leverage one another to develop unique and novel materials, process controls and further fundamental understanding of metal deposition processes will be outlined.

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Calcium Carbonate Biofouling In The Presence Of Heavy Metals

Product Number: 51321-16606-SG

Author: P.D. Natsi/ P.G. Koutsoukos

Publication Date: 2021

$20.00

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Effect of Ni on Sulfide Stress Cracking and Stress Grooving in Carbon Steel - Part 1: Constant-load (Dead-weight) Test

Product Number: 51324-20715-SG

Author: Taishi Fujishiro; Taro Muraki; Nobuyuki Ishikawa; Daichi Izumi; Takuya Hara

Publication Date: 2024

$40.00

Sulfide stress cracking (SSC) occurs in steel exposed to sour environments. Ni promotes the formation of a crack-like corrosion morphology (so-called stress groove or fissure), which accelerates the SSC; however, the mechanisms underlying fissure formation and growth are not fully understood. In this study, the effects of Ni on SSC and fissures were investigated. Constant-load tests were conducted at various potentials using TS 800 MPa grade steel with and without 1 % Ni addition. The fissures were formed near the corrosion potential on adding Ni. Anodic or cathodic polarization promoted SSC, suggesting that SSC was affected by both active path corrosion (APC) and hydrogen embrittlement (HE) mechanisms. In addition, the fissure shapes and crystal orientations of the microstructure were analyzed to classify the fissures as dissolution (corrosion) or mechanical cracking. Further, characteristic grooves promoted by Ni were confirmed to be APC.

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Effect of Ni on Sulfide Stress Cracking and Stress Grooving in Carbon Steel - Part 2: Four Point Bend Test

Product Number: 51324-20709-SG

Author: Nobuyuki Ishikawa; Taishi Fujishiro; Eiji Tada; Daichi Izumi; Junji Shimamura

Publication Date: 2024

$40.00

Four point bend sulfide stress cracking (SSC) tests were carried out under various conditions of H2S partial pressure, pH, soaking time, and applied stress to investigate the formation of stress groove (or fissure) and SSC behavior in TS 800 MPa (116 ksi) grade steel plates with 1%Ni added and 0% Ni steels. Under low hydrogen sulfide (H2S) partial pressure conditions, a fissure was formed only in the 1%Ni steel, although no SSC occurred. Morphology of the fissure in 1% Ni steel indicates that fissure extends by a corrosion, which is also called the anodic dissolution or the active path corrosion (APC). The fissure in 1%Ni steel grew almost linearly with soaking time in the test solution with stabilized pH condition. Formation and growth of fissure was enhanced by higher applied stress and there was a limiting stress for the formation of fissure. SSC occurred in both steels under high H2S partial pressure and low pH conditions. Detailed metallographic investigation for SSC cracks revealed that a corrosion pit initially formed then turned into a crack possibly by hydrogen embrittlement (HE), then finally caused unstable crack extension to rapture the specimen. Based on the experimental results for the fissure formation and SSC, the effect of both APC and HE are discussed.

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NACE Publication 6A287-1997, Electroless Nickel Coatings (1997 Edition)

Product Number: 24089-SG

ISBN: N/A

Publication Date: 1997

$179.00

Electroless nickel is a term used to describe plating of a nickel-alloy coating onto a suitable substrte by chemical reduction. The process is sometimes also called autocatalytic nickel or chemical nickel, especially in Europe. HISTORICAL DOCUMENT

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SP0199-2018 Installation of Stainless Chromium-Nickel Steel and Nickel-Alloy Roll-Bonded and Explosion-Bonded Clad Plate in Air Pollution Control Equipment

Product Number: 21087-SG

ISBN: 1-57590-075-0

Publication Date: 2018

$109.00

Guidelines for fabrication, welding, and installation of clad plate bonded to air pollution control or other equipment such as FGD systems, ducts, and stacks.

Understanding the Effect of Water Chemistry and Surface Grinding on the Stress Corrosion Cracking Initiation of Filler Metal 82

Product Number: ED22-17143-SG

Author: N.SUPORNPAIBUL, M.G. BURKE, J. DUFF, F. SCENINI, Y.WANG

Publication Date: 2022

$20.00

SCC of Ni-base filler metal (FM) 82 has been reported in the nozzles and other components in Light Water Reactors (LWRs). The typical characteristics of stress corrosion cracking (SCC) of Ni-base alloys are a long incubation time followed by slow propagation, which can suddenly transition to fast propagation. Whilst there has been considerable effort expended to develop an SCC mechanism that can explain and predict SCC in Alloy 600, fewer studies have investigated SCC of FM 82. The Preferential Intergranular Oxidation (PIO) SCC mechanism of Alloy 600 proposed by Bertali et al. which is an evolution of the Selective Internal Oxidation SCC mechanism proposed by Scott and Le Calvar is considered one of the most representative primary water SCC mechanisms for Alloy 600.

Products tagged with 'nickel'

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