Our recent article in CORROSION Journal entitled:
Hydrogen Embrittlement of Industrial Components: Prediction, Prevention, and Models published in CORROSION journal (July 2016).
The proposed model for structural integrity analysis of industrial components is based on the correlation of mechanical properties to the fractography analysis of Charpy specimens in the presence of simultaneously active hydrogen embrittlement mechanisms: hydrogen-enhanced localized plasticity (HELP) and hydrogen-enhanced decohesion (HEDE) after reaching the critical hydrogen concentration.
A background for the analysis of the viable hydrogen embrittlement mechanisms in a ferritic-pearlitic carbon steel and development of a model for structural integrity analysis, presented in this paper, is a literature overview about the current state of the art in hydrogen embrittlement modeling and studies (140 References).
Milos B. Djukic, Gordana M. Bakic, Vera Sijacki Zeravcic, Aleksandar Sedmak, and Bratislav Rajicic, Hydrogen Embrittlement of Industrial Components: Prediction, Prevention, and Models. CORROSION. 2016; 72(7): 943-961., http://dx.doi.org/10.5006/1958
This article is published in the July 2016 issue of CORROSION (special issue: 2015 Research Topical Symposia (RTS) – Environmentally Assisted Cracking).
The RTS is the annual symposium organized by NACE research committee with a focus on topical issues of present scientific significance. The RTS was held at NACE International CORROSION 2015 Conference, Dallas, USA, March 15-19, 2015. The presentations at the RTS: Environmentally Assisted Cracking and articles in a future 2016 special issue of CORROSION were all invited contributions.
Hydrogen embrittlement is a common, dangerous, and poorly understood cause of failure in many metal alloys. In practice, it is observed that different types of damage to industrial components have been tied to the presence and localization of hydrogen in metals. Many efforts have been made at understanding the effects of hydrogen on materials, resulting in an abundance of theoretical models and papers. However, a fully developed and practically-applicable predictive physical model still does not exist industrially for predicting and preventing hydrogen embrittlement. The connection of microstructure-based behaviors of materials and effects on the macroscopic measurable characteristics (stress levels, hardness, strength, and impact toughness) is of the utmost importance to achieve a unified model for hydrogen embrittlement. This paper gives an overview of the application of a model for structural integrity analysis of boiler tubes made of plain carbon steel exposed during operation to a local corrosion process and multiple hydrogen assisted degradation processes: hydrogen embrittlement and high-temperature hydrogen attack. The model is based on the correlation of mechanical properties to scanning electron microscopy fractography analysis of fracture surfaces in the presence of simultaneously active hydrogen embrittlement micro-mechanisms. The proposed model is practical for use as a predictive maintenance in power plants, as it is based on the use of standard macro-mechanical tests.
Copyright © 2016 NACE International. All rights reserved.
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The Network of Excellence (NoE) in Hydrogen Embrittlement aims to strengthen scientific and technological excellence by developing an integrated and interdisciplinary scientific approach, and also by addressing the fragmentation of European and Worldwide research in this area.
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