In situ 3D monitoring of corrosion on carbon steel and ferritic stainless steel embedded in cement paste

Itty, Pierre-Adrien; Serdar, Marijana; Meral, Cagla; Parkinson, Dilworth; MacDowell, Alastair A.; Bjegović, Dubravka; Monteiro, Paulo J.M.

doi:10.1016/j.corsci.2014.03.010

Cited by 73 publications

(21 citation statements)

References 38 publications

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“…Through this innovative method, the cracked cement paste, the propagating corrosion products, and the corroded steel with a resolution of few micrometers had been investigated in-situ and non-invasively. It was also concluded that after depassivation of steel, the average rate of steel loss recorded by X-ray microcomputed tomography correlated well with the one predicted by Faraday's law of electrolysis [86]. 4) Qian's research group developed an attractive on-line corrosionmonitoring approach that only exploited three heterogeneous tiny energy sources to power commercial-off-the-shelf wireless sensor motes such that the corrosion related data were automatically captured and sent to users via wireless manner [87].…”

Section: Steel Corrosionmentioning

confidence: 60%

“…From the comparison of these two configurations, an interface dominated corrosion process was very sensitive to the uniformity of the interface formed on the steel [85]. 3) Active corrosion with an external anodic current of 5 mA/cm 2 was induced by corroding steel embedded in cement paste in an X-ray microcomputed tomography study [86]. The electrochemical setup and X-ray microcomputed tomography examination of this method were presented in Fig.…”

Section: Steel Corrosionmentioning

confidence: 99%

See 1 more Smart Citation

Recent durability studies on concrete structure

Tang

Yao

Andrade

2015

Cement and Concrete Research

432

121

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Section: Steel Corrosionmentioning

confidence: 60%

Section: Steel Corrosionmentioning

confidence: 99%

Recent durability studies on concrete structure

Tang

Yao

Andrade

2015

Cement and Concrete Research

432

121

View full text Add to dashboard Cite

“…Ensaios de polarização potenciodinâmica foram efetuados numa célula eletroquímica de três eletrodos. Como eletrodo de referência (ER) utilizou-se um eletrodo de calomelano saturado (SCE) em um capilar de Luggin contendo uma solução saturada de KCl [1,11]. Uma malha de aço inoxidável AISI 310 foi usada como contra eletrodo (CE) e o aço embebido na argamassa como eletrodo de trabalho (ET).…”

Section: Materiais E Métodosunclassified

“…Dos sistemas de proteção existentes, merece destaque a utilização de aditivos químicos inibidores de corrosão adicionados na mistura do concreto, devido à facilidade de aplicação e custo relativamente baixo. Pesquisas existentes utilizam com eficiência à técnica quantitativa de resistência a polarização linear para mensurar a velocidade de corrosão no sistema aço/concreto [1], utilizando adições minerais [2], ou adicionando aditivos químicos inibidores de corrosão [3][4][5][6][7][8], porém, na maioria das vezes, o efeito dos aditivos quí-micos é avaliado em solução em contato com o aço [3][4][5][6][7][8], inferindo assim seu comportamento benéfico quando aplicado no concreto armado. No entanto, a medida de seu desempenho quando adicionado ao cimento ou concreto com aço embebido é testado com menor frequência utilizando o ensaio eletroquímico de polarização potenciodinâmica.…”

Section: Introductionunclassified

Avaliação de inibidores de corrosão para estruturas de concreto armado

et al. 2017

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RESUMOA corrosão de armadura é um dos maiores problemas que reduzem a durabilidade das estruturas de concreto, causada, frequentemente, pelo processo de carbonatação e ataque de íons cloretos, presentes em ambientes agressivos e marinhos. Estima-se que 90% dos problemas patológicos em estruturas de concreto no mundo tem como consequência a corrosão de armadura. Dessa forma, a pesquisa por materiais com resistência a este processo de deterioração é fundamental para melhorar a durabilidade e a eficiência das estruturas de concreto. Neste contexto, foi estudado o efeito de três aditivos químicos, um comercial à base de sais de nitrito, o molibdato de sódio (MoNa 2 O 4 ) e o tungstato de sódio (Na 2 O 4 W.2H 2 O), utilizados nos teores de 1% e 2% em relação à massa de cimento. Foram preparados corpos de prova cilíndricos de argamassa (classe de resistên-cia de 30 MPa) com aço embebidos neste, para serem submetidos ao ensaio eletroquímico de polarização potenciodinâmica. A utilização do aditivo comercial não foi eficiente na redução das taxas de corrosão, porém, o efeito do tempo de cura, reduziu a taxa média de corrosão de 4,7 mm/ano aos 60 dias, para 1,6 mm/ano, aos 90 dias. Os melhores resultados foram obtidos para os aditivos de molibdato e tungstato, nos quais foi observado um índice de eficiência do aditivo de 50%, para adição de 1% de molibdato, e de 29%, para adição de 2% de tungstato. Palavras-chave: Corrosão, Concreto armado, Aditivos químicos. ABSTRACTConcrete reinforcement corrosion is one of the most important problems that diminish the durability of concrete structures, and it is often caused by the carbonation process and chloride ion attack in aggressive and marine environments. It is estimated that 90% of pathological problems affecting concrete structures worldwide lead to reinforcement corrosion. The research for materials with resistance to this deterioration process is fundamental to improve the durability and efficiency of concrete structures. In this context, the effect of three chemical additives, a commercial one based on nitrite salts, sodium molybdate (MoNa 2 O 4 ) and sodium tungstate (Na 2 O 4 W.2H 2 O), used in contents of 1% and 2% in relation to the cement mass. Cylindrical, steel embedded, mortar samples (30 MPa strength class) were submitted to the potentiodynamic polarization test. The use of commercial additive was not efficient in reducing corrosion rates, but the effect of curing time reduced the mean corrosion rate from 4.7 mm/year at 60 days to 1.6 mm/year, at 90 days. The best results were obtained for the tungstate and molybdate additives, in which the addition of 1% of molybdate additive presented an efficiency rate of 50%, while 2% of tungstate additive presented an efficiency rate of 29%.

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“…Various types of sensors and reference electrodes were developed for corrosion monitoring [21][22][23][24][25][26][27][28]. Automatic system [29], remote corrosion monitoring system [30], 3-D monitoring system [31], and multielectrode system [32] were also developed recently. Performance of different corrosion monitoring techniques were reviewed, compared, and assessed [33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Self-Powered Wireless Sensor Network for Automated Corrosion Prediction of Steel Reinforcement

Xia

Yuan

2018

Journal of Sensors

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Corrosion is one of the key issues that affect the service life and hinders wide application of steel reinforcement. Moreover, corrosion is a long-term process and not visible for embedded reinforcement. Thus, this research aims at developing a self-powered smart sensor system with integrated innovative prediction module for forecasting corrosion process of embedded steel reinforcement. Vibration-based energy harvester is used to harvest energy for continuous corrosion data collection. Spatial interpolation module was developed to interpolate corrosion data at unmonitored locations. Dynamic prediction module is used to predict the long-term corrosion based on collected data. Utilizing this new sensor network, the corrosion process can be automated predicted and appropriate mitigation actions will be recommended accordingly.

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In situ 3D monitoring of corrosion on carbon steel and ferritic stainless steel embedded in cement paste

Cited by 73 publications

References 38 publications

Recent durability studies on concrete structure

Recent durability studies on concrete structure

Avaliação de inibidores de corrosão para estruturas de concreto armado

Self-Powered Wireless Sensor Network for Automated Corrosion Prediction of Steel Reinforcement

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