Sensitivity Analysis of Corrosion Rate Prediction Models Utilized for Reinforced Concrete Affected by Chloride

Siamphukdee, Kanjana; Collins, Francis Gerard; Zou, Roger

doi:10.1007/s11665-012-0447-1

Cited by 20 publications

(7 citation statements)

References 48 publications

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“…Nessa premissa, não se observou ataque de cloretos à camada passiva da armadura que ocasionasse corrosão pontual conhecida como pite, despassivando a armadura (MOTA, 2009, SIAMPHUDKEE et al, 2013.…”

Section: Resultados E Análiseunclassified

Manifestações Patológicas De Parte Do Edifício No Conjunto Habitacional Em Paulista-Pe

Figueiredo¹,

Pinto²,

Silva³

et al. 2020

≫Congresso Brasileiro De Patologia Das Construções

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Objetivou-se neste trabalho analisar as patologias em peças de concreto armado de uma edifício localizado no Bairro de Maranguape I, na cidade de Paulista/PE. O estudo delimita-se a estruturas de concreto armado que sustenta a escada e reservatório superior de água. Como método de investigação, buscou-se realizar: (a) ampla inspeção visual com acervo fotográfico para estabelecer os níveis de deterioração estabelecido pelo boletim 162 do CEB; (b) ensaios de carbonatação; (c) ensaios de íons cloretos livres. Nesse contexto, poder-se-ia melhor apontar um diagnostico provável das causas da deterioração das estruturas. Não obstante, os elementos estruturais foram caracterizados quanto ao seu tempo em serviço, resistência à compressão, tipo de revestimento, detalhes específicos dos danos. Os resultados indicaram que a maioria das peças precisa de intervenções imediatas devido aos elevados níveis de degradação.

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Section: Resultados E Análiseunclassified

Manifestações Patológicas De Parte Do Edifício No Conjunto Habitacional Em Paulista-Pe

Figueiredo¹,

Pinto²,

Silva³

et al. 2020

≫Congresso Brasileiro De Patologia Das Construções

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“…As for the accelerated corrosion tests, the corrosion rate of each material was initially identified by weight loss measurement (Jang et al 2009). According to ASTM G1 standard (Siamphukdee et al 2013), the corrosion rate (mm/y) was calculated as Eq. (1): where K is the constant in (mm h)/(year cm)-87,600, W is the mass loss in grams, A is the coupon exposed area in cm 2 , t is the time of exposure in hours and ρ is the specific mass of the experimental material in g/cm 3 , respectively.…”

Section: Methodsmentioning

confidence: 99%

Prevention of stack corrosion under wet flue gas desulfurization conditions in a coal-fired power plant: performance analysis and comparative study

Zhao

Han

et al. 2016

Environ Syst Res

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Background: This study investigated the prevention of stack corrosion under wet flue gas desulfurization conditions in a coal-fired power plant. The performance analysis and comparative studies of six materials for the prevention of stack corrosion were investigated. Results:The ion chromatography analysis showed the acid condensation contained fluoride, chloride, nitrate, sulphate, and sulphite. The weight loss method showed titanium alloy and foam glass blocks were heat and acid resistant. The scanning electron microscopy indicated the morphologies were pits, cracks, and flakes for sulfuric acid dew corrosion resistant steel, and X-ray diffraction showed the corrosion products mainly consisted of Fe 2 O 3 , FeSO 4 , FeOOH, with some Fe 3 O 4 or FeF 3 . The comparative study indicated that cyclic wet-dry conditions resulted in more aggressive corrosion to the stack than acid condensation. Conclusions:Titanium alloy and foam glass blocks had the best performance and could be applied in the stack to prevent corrosion. The effects of cyclic wet-dry conditions should be taken into account to mitigate stack corrosion in coal-fired power plants.

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“…In the past several decades, the corrosion rate of steel reinforcement in RC structures under chloride-laden environments has been widely investigated and the key approaches to modelling the corrosion rate can be summarized as being based on Siamphukdee et al (2013): (1) empirical, (2) kinetics of the electrochemical reaction and (3) equivalent electrical circuit modelling. This study focuses on the empirical models of corrosion rate developed from field data and/or experimental results (Otieno et al, 2011; Raupach, 2006), which are based on assumed direct relationships between the corrosion rate of the steel reinforcement and the basic properties and parameters of concrete such as water-to-cement ( w / c ) ratio, cover depth, concrete resistivity, type of binder and the exposure conditions considering chloride content, corrosion duration, relative humidity and ambient temperature.…”

Section: Introductionmentioning

confidence: 99%

Empirical model of corrosion rate for steel reinforced concrete structures in chloride-laden environments

Lun

et al. 2018

Advances in Structural Engineering

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The corrosion rate of reinforcing steel is an important factor to determine the corrosion propagation of reinforced concrete structures in the chloride-laden environments. Since the corrosion rate of reinforcing steel is affected by several coupled parameters, the efficient prediction of which remains challenging. In this study, a total of 156 experimental data on corrosion rate from the literature were collected and compared. Seven empirical models for predicting the corrosion rate were reviewed and investigated using the collected experimental data. Based on the investigations, a new empirical model is proposed for predicting the corrosion rate in corrosion-affected reinforced concrete structures considering parameters including concrete resistivity, temperature, relative humidity, corrosion duration and concrete chloride content. The comparison between the experimental data and those predicted using the new empirical model demonstrates that the new model gives a good prediction of the corrosion rate. Furthermore, the uncertainty and probability characteristics of these empirical models are also investigated. It is found that the probability distributions of the model errors can be described as lognormal, normal, Weibull or Gumbel distributions. As a result, the new empirical model can provide an efficient prediction of the corrosion rate of reinforcing steel, and the model error analysis results can be utilized for reliability-based service life prediction of reinforced concrete structures under chloride-laden environments.

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Sensitivity Analysis of Corrosion Rate Prediction Models Utilized for Reinforced Concrete Affected by Chloride

Cited by 20 publications

References 48 publications

Manifestações Patológicas De Parte Do Edifício No Conjunto Habitacional Em Paulista-Pe

Manifestações Patológicas De Parte Do Edifício No Conjunto Habitacional Em Paulista-Pe

Prevention of stack corrosion under wet flue gas desulfurization conditions in a coal-fired power plant: performance analysis and comparative study

Empirical model of corrosion rate for steel reinforced concrete structures in chloride-laden environments

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