AMPP Store - Products tagged with 'passivity'

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51318-11026-The Role of Al Interstitials on the Passivation of AA2098-T851 Based on the Mixed Potential Model

Product Number: 51318-11026-SG

Author: Elmira Ghanbari / Alireza Saatchi / Digby D. Macdonald

Publication Date: 2018

$20.00

The electrochemical behavior of the third generation Al-Li alloy 2098 was investigated with a fundamental approach, where experimental results were theoretically analysed in terms of the Point Defect Model (PDM).

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51318-11236-Using Electrochemical Noise to Elucidate the Mechanisms involved in Localized Corrosion – A Review

Product Number: 51318-11236-SG

Author: Helmuth Sarmiento Klapper

Publication Date: 2018

$20.00

Passive layer stability and breakdown, metastable pitting and stable pit growth in stainless steels. Also, the benefits and challenges of using electrochemical noise for studying localized corrosion of stainless steels.

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Effect of H2S Concentration on the Passivation Behavior of Modified 13 Cr Martensitic Stainless Steels

Product Number: 51324-21009-SG

Author: Alan Martinez; Deeparekha Narayanan; Raymundo Case; Homero Castaneda; Ahmed Baghat

Publication Date: 2024

$40.00

Modified 13 Cr Martensitic Stainless steels (UNS S41426) are used extensively in the oil and gas industry as wellbore components in sweet and moderately sour service applications. The synergistic effects between H2S activity and temperature have a detrimental effect on the passive film stability. Electrochemical tests were performed using a 1L autoclave holding 35 bar of CO2 gas and varying H2S activity at 25°C and 150°C at a pH of 3.5. The pitting susceptibility is enhanced in regions along Ti(C,N) inclusions and regions where defective sulfide films generate local galvanic cells around regions with limited protection along the steel surface further driving the pitting process. Both DC and AC electrochemical techniques were correlated with microstructural characterization to observe the extent of passivation on the surface. Some service limits under acidic conditions are proposed based on the electrochemical results.

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Evaluation of the relationship between passivity and microstructure in austenitic stainless steel, the Point defect perspective

Product Number: 51323-19434-SG

Author: Raymundo Case, Homero Castaneda, Yuan Ding, Adnan Khan, M. L Cedeno- Vente, Gabriela Pena

Publication Date: 2023

$20.00

Additive manufacturing (AM), commonly referred to as 3D printing, offers advantages over traditional
production methods, such as quick prototyping, short production runs and intricate, thin section,
microfluidic, variable composition, and low-waste designs. These exciting features are accompanied by
new challenges, such as higher costs, the possibility of variable quality, and inherently anisotropic
properties.

Existing AM technologies include 3D printing, rapid prototyping (RP), direct digital manufacturing (DDM),
selective laser melting (SLM), and direct metal laser Sintering (DMLS).

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Investigation of passive film formation on UNS N08935 in high chloride solution – Alternative method for advanced material selection

Product Number: 51323-19266-SG

Author: Nian Zhou, Robert Mattsson Öhnfeldt, Daniel Gullberg, Ulf Kivisäkk

Publication Date: 2023

$20.00

Material selection to get “fit-for-purpose” alloys is an important task that corrosion engineers face in their daily work. Two common ways of attacking such a challenge is by testing different alloys in environments similar to the application in a laboratory environment or installing samples in actual operating equipment. In the latter, testing is usually time consuming and might require plant turnovers to get access to the equipment for sample installation.

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Understanding the False Positive of Modified Martensitic Steels in Sweet & Sour Service Conditions using a Point Defect Model Perspective

Product Number: 51323-18901-SG

Author: Alan Martinez, Raymundo Case, Yuan Ding, Homero Castaneda, Jolly Bhadra, Noora Al-Thani, Aboubakr Abdullah, Ahmed Bahgat, Abdraman Moussa, Noora Al-Qahtani, Muhsen El Haddad

Publication Date: 2023

$20.00

Modified 13Cr (UNS S41426) (M13Cr) are advantageous as components for wellbores in oil and gas upstream units due to their high strength capabilities and tremendous corrosion resistance in sweet environments with minimal H2S levels. However, previous studies speculate disparities between an overestimation in the application limits for the 110 ksi grade material. Previous experimental results associate this to microstructural differences from varying heat treatments. The proprietary procedures used to manufacture, emphasize a lack of quality control among suppliers.

Products tagged with 'passivity'

51318-11026-The Role of Al Interstitials on the Passivation of AA2098-T851 Based on the Mixed Potential Model

51318-11236-Using Electrochemical Noise to Elucidate the Mechanisms involved in Localized Corrosion – A Review

Effect of H2S Concentration on the Passivation Behavior of Modified 13 Cr Martensitic Stainless Steels

Evaluation of the relationship between passivity and microstructure in austenitic stainless steel, the Point defect perspective

Investigation of passive film formation on UNS N08935 in high chloride solution – Alternative method for advanced material selection

Understanding the False Positive of Modified Martensitic Steels in Sweet & Sour Service Conditions using a Point Defect Model Perspective

Association for Materials Protection and Performance