Stress corrosion cracking (SCC) usually initiates at locally compromised surface regions, and ultimately at nanoscale precursor sites. The ability to identify such sites would be instrumental in predicting SCC failure and developing proactive mitigation strategies. Modern microscopy capabilities allow for the requisite micro-to-atomic scale analysis to characterize SCC and identify precursor sites at various length scales. In the latter part of his career, Roger Staehle recognized and emphasized the benefit of modern capabilities in microscopy and computational science for modeling and performing physical characterization of atomic and nanoscale processes related to SCC. Consequently, he developed the quantitative micro-nano (QMN) approach with the goal of attaining a global model of SCC on an atomistic basis. This article reviews recent studies that have applied state-of-the-art microscopy techniques to characterize SCC and associated precursors in the context of the QMN approach. Initial examples used to demonstrate characterization of nanoscale precursors include SCC of Alloy 800 in Pb-containing, caustic, and acid sulfate solutions relevant to secondary side crevice environments in nuclear power plants. In line with the QMN approach, the focus is on characterizing and understanding SCC mechanisms, leading to prediction and identification of associated precursors. Precursors to secondary side SCC of Alloy 800 are shown to include monolayer-level S or Pb at oxide-metal interfaces, the onset of dealloying, or metastable pitting corrosion. Following this, intergranular oxidation embrittlement of Alloy 600 in hydrogenated water/steam environments is explored to demonstrate the benefits of a multitechnique approach to identify SCC precursors and highlight recent advancements in in situ microscopy. Although nuclear-relevant SCC systems are used as examples, the QMN approach and benefit of identifying nanoscale precursors that correlate with SCC failure are applicable to a broad spectrum of SCC systems.
Skip Nav Destination
Research Article| September 18 2018
Nanoscale Precursor Sites and their Importance in the Prediction of Stress Corrosion Cracking Failure
R.C. Newman ‡
***Department of Chemical Engineering and Applied Chemistry, University of Toronto, 200 College Street, Toronto, Ontario M5S 3E5, Canada.
Search for other works by this author on:
CORROSION (2019) 75 (3): 228–239.
- Views Icon Views
- Share Icon Share
- Search Site
S.Y Persaud, J.M. Smith, R.C. Newman; Nanoscale Precursor Sites and their Importance in the Prediction of Stress Corrosion Cracking Failure. CORROSION 1 March 2019; 75 (3): 228–239. doi: https://doi.org/10.5006/2928
Download citation file:
Citing articles via
Localised atmospheric corrosion of magnesium-aluminum alloys produced by semi solid casting - A 2D and 3D investigation
Mehrdad Shahabi-Navid, Mats Halvarsson, Jan-Erik Svensson, Antoine Allanore, Nick Birbilis, Lars-Gunnar Johansson, Mohsen Esmaily
Effect of Hydrogen on Creep Properties of SUS304 Austenitic Stainless Steel
Daisuke Takazaki, Toshihiro Tsuchiyama, Ryosuke Komoda, Mohsen Dadfarnia, Brian Somerday, Petros Sofronis, Masanobu Kubota
Determining Critical Micelle Concentration of Organic Corrosion Inhibitors and its Effectiveness in Corrosion Mitigation
Negar Moradighadi, Starr Lewis, Juan Dominguez Olivo, David Young, Bruce Brown, Srdjan Nesic
Corrosion Behavior and Hardness of Binary Mg Alloys Produced via High Energy Ball-Milling and Subsequent Spark Plasma Sintering
Mohammad Umar Farooq Khan, Master of Technology, Taban Larimian, Tushar Borkar, Rajeev Gupta, PhD
Influence of Acetic Acid on the Integrity and Protectiveness by an Iron Carbonate (FeCO3) Corrosion Product Layer
Vanessa Fajardo, Maryam Eslami, PhD, Yoon-Seok Choi, Bruce Brown, ChE PhD, Srdjan Nesic