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Showing 1 to 20 of 44 for “"corrosion damage"”.
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Peridynamic modelling of localised corrosion damage
… and difficulty of detection, localised forms of corrosion represent a threat to human life and the environment. The current empirical and semi-empirical approaches used by engineers to hinder corrosion damage have several disadvantages and limitations. In this regard, numerical approaches can be …
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Alternative patch repair materials for rebar corrosion damage
… due to a large number of factors of which the corrosion of steel embedded within concrete is the most significant (Matthews et al., 2003). Steel corrosion is particularly pernicious to concrete due to the expansive nature of the corrosion by-products formed, which commonly leads to cracking and …
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ASSESSING CORROSION DAMAGE IN PRESTRESSED CONCRETE WITH ACOUSTIC EMISSION
… to assess the presence and rate of steel corrosion evolving inside prestressing steel reinforced small-scale concrete specimens. Test setup consists of grade 6,000 psi concrete blocks with dimensions 4.5 x 4.5 x 20 inch (114 x 114 x 508 mm); a 30 inch (760 mm) long - ½ inch (13 mm) …
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Computational Simulation of Chloride-Induced Corrosion Damage in Prestressed Concrete Bridge Girders
… concern for such bridges is the possibility of corrosion damage in the prestressing strands or reinforcing bars, which is commonly caused by the use of deicing salts on the deck or saltwater spray in coastal regions. The present study aims at establishing analytical tools for the accurate …
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The Effect of Surface Corrosion Damage on the Fatigue Life of Extruded Aluminum Alloy 6061-T6
… little has been published about the effects of damage from surface corrosion on its fatigue life. An investigation was performed where 6061-T6 extrusions were exposed to a 3.5% NaCl solution at pH 2 for 2 days and 24 days. The length of time and pH were chosen in order to create distinct surface …
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Surface Orientation Dependent Corrosion Damage and Temperature Dependent Mechanical Property Degradation of Sensitized AA5083-H116 Alloys
… changes of 5083-H116 to its resulting corrosion resistance and mechanical performance. Alcoa 5083-H116 was sensitized in an environmental chamber at 100°C for up to ~1500 hours and 150°C up to ~2000 hours, revealing different degrees of sensitization based on exposure times. …
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Methods for Evaluation of the Remaining Strength in Steel Bridge Beams with Section Losses due to Corrosion Damage
… for calculating the shear capacity of the damaged beams. Finally, the most appropriate method of these approaches was identified based on accuracy, conservatism, and ease of implementation for load rating. When using load rating methods to determine a steel beam's capacity, this study also …
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Implementation of vibration-based structural health monitoring technique for identification of simulated corrosion damage in steel pipeline using neural network
Corrosion defect has inevitably causes serious incidents in pipeline structures. Reduction in corrosion related incidents are highly desirable due to safety and cost efficiency. Current approaches have implemented destructive testing which highly cost and time consumptions. Moreover, the techniques …
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Experimental simulation of crevice corrosion of a functionally graded composite system of F91 and Fe-12Cr-2Si exposed to high-temperature lead-bismuth eutectic coolant
In a system in which metal corrosion is of concern to its long-term structural integrity, crevice corrosion can be a significant cause of damage. Small crevices in a metal exposed to a working fluid (such as a reactor's coolant) may be prone to the development of a localized, aggressive reducing …
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A study of the effect of frequency, amplitude, and load on fretting corrosion of instrument ball bearings
… before and after vibration to determine fretting corrosion damage to the bearings. The load, frequency of vibration, and amplitude of vibration were each varied to determine their effects on the fretting corrosion damage. No lubrication was used on the bearings, and the test atmosphere was held …
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Corrosion fatigue of 7005-T53 aluminum alloy
The process of corrosion fatigue involves mechanical and environmental influences that affect crack initiation, crack growth, and ultimately fatigue life. It is generally recognized that corrosion damage in the form of pits and the presence of humidity in the ambient environment have a deleterious …
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Ulterius Corrosion Health Monitoring (UCHM) using wireless sensor technologies.
… prone to various forms of coating failures and corrosion damage. The costly Scheduled-based- Maintenance (SBM) strategies are practiced for metal structures that result in huge financial overhead for industries. The current research work is aim to provide the solutions to anticipate the …
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A Method to Assess the Reliability of a Structural Frame System Subjected to Uniform Corrosion
<p>Corrosion of steel structures poses both financial and safety issues if not properly maintained. Even if proper maintenance techniques are followed, the cost can be substantial. In many industries, the current approach to determine the adequacy of structural components is based on visual …
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Influence of Bridge Deck Concrete Parameters on the Reinforcing Steel Corrosion
Chloride induced corrosion of steel in concrete is one of the major forms of deterioration mechanisms found in reinforced concrete bridges. Early age corrosion damage reduces the lifespan of the bridges, which results in heavy economic losses. Research has been conducted to identify economic …
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Use of Photogrammetry Aided Damage Detection for Residual Strength Estimation of Corrosion Damaged Prestressed Concrete Bridge Girders
Corrosion damage reduces the load-carrying capacity of bridges which poses a threat to passenger safety. The objective of this research was to reduce the resources involved in conventional bridge inspections which are an important tool in the condition assessment of bridges and to help in …
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Automating radiation damage studies of materials irradiated by high-energy protons using multiphysics simulations
Understanding radiation and corrosion damage in nuclear materials has become increasingly important in reactor design considerations. However, running irradiation damage studies in nuclear reactors is expensive and time-consuming. Thus, accurate, quick simulations have become more attractive to …
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Theory and Application of Joint Time-Frequency Analysis On Health Monitoring of Electric Cable and Guided-Waves Detection of Structural Corrosion
… distribution is presented and applied to a corrosion detection problem in order to detect the location and extent of a corrosion damage on an aluminium plate. The experimental results illustrate that the proposed cross time-frequency analysis can detect the corrosion progression more …
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One Dimensional Approach to Modeling Damage Evolution in Galvanic Corrosion
… mathematical model is developed to describe damage evolution in galvanic corrosion for a variety of geometries. An asymptotic procedure taking advantage of disparity in length scales is used to derive the model. The focus of this thesis is to detail the formulation and solution of the 1D …
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Fatigue Behaviour of CFRP Strengthened Reinforced Concrete Beams
… subjected to low stress range cyclic loading. Corrosion damage exacerbates fatigue related problems as chloride induced pitting corrosion facilitates the formation and gradual propagation of cracks under cyclic loading. A common rehabilitation and retrofitting approach that involves patch …
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General reviews of electrochemical and corrosion phenomena under conditions associated with supercritical water oxidation
… highly oxidizing conditions leads to severe corrosion of the process unit for even the most corrosion resistant constructional alloys. Currently, the existence of a constructional material that can withstand the extremely aggressive conditions present in all sections of the SCWO process …
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