Hydrogen-assisted stress-corrosion of prestressing wires in a motorway viaduct

Vehovar, L.; Kuhar, Viljem; Vehovar, Andraž

doi:10.1016/s1350-6307(97)00034-4

Cited by 51 publications

(15 citation statements)

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“…The data obtained in this study may be relevant in the research of hydrogen transport phenomena through diffusion within the material, producing hydrogen embrittlement of the component [6]. These phenomena are potentially very dangerous, mainly in structural elements designed in engineering [7,8]. Thus in this study the evolution of mean normal (or hydrostatic) stress, a variable representing the stress state of the materials according to the model of hydrogen diffusion assisted by stresses and strains [9][10][11], is obtained in each step of the fatigue loading process.…”

Section: Introduction mentioning

confidence: 81%

Influence of Fatigue Loading on the Residual Stress Distribution in Prestressing Steel Wires

Toribio¹,

Lorenzo²,

Vergara³

2012

JCEA

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This paper analyzes the influence of fatigue loading on the residual stress profile in high strength steel wires. To this end, different sinusoidal loads with diverse values of maximum loading level and number of cycles were simulated on wires in which several residual stress profiles had been previously introduced, some of them with a tensile state and others with a compressive state. An analysis was made of the evolution with time of such residual stress laws by comparing them at key instants of loading, that is, at initial instant, at maximum load, at minimum load and at final instant. Numerical results show only a minor influence of fatigue loading on the residual stress profile.

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Section: Introduction mentioning

confidence: 81%

Influence of Fatigue Loading on the Residual Stress Distribution in Prestressing Steel Wires

Toribio¹,

Lorenzo²,

Vergara³

2012

JCEA

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“…Hydrogen is introduced by the improperly pickling process in general. As for the hydrogen-induced stress corrosion cracking mechanism, Vehovar et al [5] reported its cause as the embrittlement of the prestressing tendons due to the penetration of hydrogen atoms, generated by hydrogen reduction at the alloy's surface. Enos and Scully et al [6] used a simulated steel-concrete interface and laboratory-scale prestressed concrete pilings to study the safe cathodic protection limits for prestressing steel in concrete about hydrogen embrittlement.…”

Section: Introductionmentioning

confidence: 99%

Corrosion of High-Strength Steel Wires under Tensile Stress

Chen

et al. 2020

Materials

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The stress corrosion cracking is the central issue for high-strength wires under high tensile stress used in civil engineering. This paper explores the resistance of stress corrosion cracking of three typical steel wires of high-strength carbon through a laboratory test, combining the actions of tensile stress and corrosive solution. Besides, the impact of tensile stress and immersion time are also investigated. During the tests, the wires were subject to electrochemical measurements of potentiodynamic polarization and electrochemical impedance spectroscopy, and the microstructure analysis was performed on the fractured cross sections. The obtained results show the following: the high-strength wire, conforming to GB/T 5224, has higher resistance to the combined actions of tensile stress and corrosive solution; tensile stress of 70% fracture strength and longer loading-immersion time make the film of corrosion products on steel surface unstable and weaken the corrosion resistance; the surface film consisted of the iron oxide film and the corrosion products film whose components are mainly iron thiocyanate and iron sulphide.

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“…Moreover, it depends on environmental parameters, such as dissolved salt in water, pH and potential. The presence of conductive layers on the surface can promote localized attacks, with formation of local environment in the occluded cells [17], critic for the initiation of stress corrosion cracking [3,18]. In concrete structures, bars can be exposed to different environments, because these are used as external or internal unbonded tendons or bonded tendons embedded in concrete.…”

Section: Introductionmentioning

confidence: 99%

Effect of Hot Mill Scale on Hydrogen Embrittlement of High Strength Steels for Pre-Stressed Concrete Structures

Cabrini

Lorenzi

Pastore

et al. 2018

Metals

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Abstract:The presence of a conductive layers of hot-formed oxide on the surface of bars for pre or post-compressing structures can promote localized attacks as a function of pH. The aggressive local environment in the occluded cells inside localized attacks has as consequence the possibility of initiation of stress corrosion cracking. In this paper, the stress corrosion cracking behavior of high strength steels proposed for tendons was studied by means of Constant Load (CL) tests and Slow Strain Rate (SSR) tests. Critical ranges of pH for cracking were verified. The promoting role of localized attack was confirmed. Further, electrochemical tests were performed on bars in as received surface conditions, in order to evaluate pitting initiation. The adverse effect of mill scale was recognized.

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Hydrogen-assisted stress-corrosion of prestressing wires in a motorway viaduct

Cited by 51 publications

References 1 publication

Influence of Fatigue Loading on the Residual Stress Distribution in Prestressing Steel Wires

Influence of Fatigue Loading on the Residual Stress Distribution in Prestressing Steel Wires

Corrosion of High-Strength Steel Wires under Tensile Stress

Effect of Hot Mill Scale on Hydrogen Embrittlement of High Strength Steels for Pre-Stressed Concrete Structures

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