AMPP Store - Individual Conference Papers

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Alleviating Stray Current Concerns “Our Infrastructure is Corroding!”

Product Number: 51323-19233-SG

Author: Kevin J. Sunderman

Publication Date: 2023

$20.00

Stray current prevention, where do you start? When dealing with stray current from a DC Transit
system it is all about building in “layers” of protection. This begins right from the start of your project through the creation of a design and maintenance guideline, through construction with inspection and testing plans and then through long range testing and maintenance plans.

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Alloy 182 Models for the Prediction of the Susceptibility to SCC of BMI Nozzle J-welds

Product Number: ED22-17286-SG

Author: Thierry Couvant

Publication Date: 2022

$20.00

Stress Corrosion Cracking (SCC) models are important for engineering and regulatory assessments. The SCC time to the growth of a crack of engineering scale is the main fraction of component life prior to failure and is therefore of significant interest for modeling. However, the stochastic characteristics of early crack development is challenging for model development and validation.

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Alloy 29 and Alloy 825 for Chemical Injection Lines

Product Number: 51319-13162-SG

Author: Wenle He

Publication Date: 2019

$20.00

Cold worked Alloy 28 (UNS N08028) and Alloy 29 (UNS N08029) have been successfully used as Oil Country Tubular Goods (OCTG) in H2S-containing downhole applications. Laboratory testing showed high stress corrosion cracking (SCC) resistance of these alloys in sour conditions outside of ISO limits for 4c type materials where Alloy 828 Alloy 28 and Alloy 29 belong to. Recently a similar study found in literature showed comparable results between cold worked Alloy 28 and Alloy 825 (UNS N08825). Alloy 28 Alloy 29 and Alloy 825 in annealed conditions belong to 4a type materials which have higher SCC resistance compared to the cold worked materials. Compared to Alloy 825 Alloy 29 is arelatively new material which has been introduced in control line and chemical injection line applications. However corrosion testing data is not always available for these materials in annealed conditions. ISO 15156-3 has no environmental limits for the 4a type materials. This work aimed at to provide pitting corrosion resistance data on the full-size tube materials for control line and chemical injection line in annealed conditions.Pitting corrosion resistance of Alloy 29 and Alloy 825 has been determined by critical pitting temperature (CPT) per ASTM G150 on full-size seamless tubes in annealed condition for control line and chemical injection applications. The effect of pitting resistance equivalent (PRE) has been studied by using Alloy 825 Alloy 316L (UNS S31603) in control line dimensions. Alloy 28 and Alloy 29 in cold worked condition for OCTG application were also included.The CPT was 70°C for Alloy 29 and 30 ~ 45°C for Alloy 825 which was mainly dependent on pitting resistant equivalent (PRE) of the materials. Alloy 29 and Alloy 825 belong to same category 4a and 4c type nickel-based alloys defined by ISO15156-3 for down-hole applications. Because Alloy 29 has higher PRE and lower Ni content compared to Alloy 825 Alloy 29 can be considered as a cost-saving material for control line and chemical injection line applications.

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Alloy 35Mo A New versatile PRE 52 Alloy

Product Number: 51319-12901-SG

Author: Ulf Kivisakk

Publication Date: 2019

$20.00

Alloy 35Mo is a new structural stable high PRE austenitic alloy with the composition: 27 Cr - 35 Ni - 65 Mo - 028 N. The alloy is successfully welded with Alloy 59 as filler. The grade is a combination of Ni-base and high PRE super austenitic grade which results in interesting properties for the alloy. It has a high PRE value of 52 which results in a CPT >95°C in ASTM G150 with 3 M MgCl2. The CPT is considerable higher than for conventional 6 Mo alloys that has a CPT about 65°C and also higher than most Ni-base alloys. A consequence of the high nitrogen content in Alloy 35Mo is a good ductility and a high yield strength of more than 400 MPa in solution annealed condition. This is higher than conventional 6 Mo alloys. Alloy 35Mo is versatile alloy for applications in for instance oil & gas chemical and petrochemical industry which is demonstrated by corrosion testing.

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Alloy A975 Resistant To Severe Sour Environments And To Hydrogen Embrittlement

Product Number: 51321-16814-SG

Author: Ernst Plesiutschnig; Rainer Fluch; Martin Wöls; Marianne Kapp; Greg Chitwood

Publication Date: 2021

$20.00

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Alloy UNS N06058: A solution for demanding corrosive applications where common members of the Ni-Cr-Mo alloys experience their limits

Product Number: 51320-14557-SG

Author: D. Niespodziany, R. Behrens, H. Alves

Publication Date: 2020

$20.00

The high performance alloy UNS N06058 contains about 21 wt.-% chromium and at least 18.5 wt.-% molybdenum. It is the first member of the Ni-Cr-Mo alloys intentionally strengthened with nitrogen. Based in the combination of its alloying constitutes this alloy is highly resistant to oxidizing as well as to reducing corrosive media. Evidenced by the high Pitting Resistance Equivalent (PRE) number of about 86 the alloy UNS N06058 shows an outstanding resistance to localized corrosion as well.

The objective of this paper is to outline the characteristics of alloy UNS N06058 and therefore to highlight the successful use of it in demanding corrosive applications in the process industry and other sectors.

Main characteristics such as microstructure, mechanical properties and fabrication will be discussed. The very good weldability of alloy UNS N06058 has been verified by the German TÜV1. A matching filler metal, which is officially qualified according to AWS 5.14 (American Welding Society)2, is available. In addition, prior work shows that alloy UNS N06058 can be reliably explosion clad. Furthermore, corrosion resistance determined under laboratory conditions as well as in field studies will be presented not only for the base material but also exemplary on welded and cladded samples. Examples of applications will complete the comprehensive overview of this work.

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Product Number: 51319-13501-SG

Author: Deepali Patil

Publication Date: 2019

$20.00

Molybdenum-silicon-boron-titanium-iron (Mo-Si-B-Ti-Fe) alloys are of interest for high temperature applications primarily due to their superior creep resistance. However these alloys have unacceptable corrosion rates in high temperature environments thereby necessitating the need for protecting the surface of these alloys against oxidative attack. Aluminizing is one approach that could be effective. A Mo–12.5Si– 8.5B–25Ti–2Fe (at.%) alloy was aluminized using halide activated pack cementation (HAPC). The process was carried out at 750°C for times ranging from 1 to 25 hours in an argon environment. The aluminized specimens were characterized using X-ray diffraction (XRD) optical microscopy and scanning electron microscopy with energy dispersive spectroscopy (SEM/EDS). Coating thickness structure phase identification and elemental compositions were obtained using these techniques. The morphologies for different coating times in the 1 – 25 h range will be discussed. Cyclic oxidation tests of both aluminized and as-received Mo-Si-B-Ti-Fe were conducted for several cycles with each cycle consisting of a 1-hour hold at 800°C followed by room temperature exposure for 10 minutes. Aluminized coupons exhibited superior oxidation resistance relative to the as-received alloys of Mo-Si-B-Ti-Fe.

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Association for Materials Protection and Performance