Electrochemical corrosion behaviour of a Ti‐IF steel and a SAE 1020 steel in a 0.5 M NaCl solution

Osório, Wislei R.; Peixoto, Leandro C.; Garcia, Amauri

doi:10.1002/maco.200905420

Cited by 19 publications

(12 citation statements)

References 41 publications

(67 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Uma terceira região é caracterizada em baixa frequência, comumente inferior a 10 0 Hz (até a 10 -2 Hz), que descreve as reações de interface entre a superfície da barra de aço com o eletrólito penetrado no concreto (pasta) com suas características (íons porosos, agregados e intermediários) (Osorio et al, 2009;Hu et al, 2022).…”

Section: Resultsunclassified

Estudo da corrosão e da microestrutura no compósito cimentício autoadensável com substituição do agregado miúdo por resíduo de vidro

Torres

Melo

Ribeiro

et al. 2022

RSD

View full text Add to dashboard Cite

O objetivo desse trabalho é investigar a corrosão e a microestrutura no compósito cimentício autoadensável com a substituição do agregado miúdo por resíduo de vidro. Uma das patologias mais frequentes encontradas no concreto armado é a corrosão de armaduras que envolve riscos à segurança da estrutura. Entre as várias técnicas para se estudar e avaliar a corrosão neste trabalho foi escolhida a espectroscopia de impedância eletroquímica (EIE) que caracteriza uma grande variedade de sistemas eletroquímicos. Foram moldados corpos de prova no traço de 1:1:0,1:0,43 sendo um de referência (sem adição de resíduo), outros com substituição de 5%, 10%, 15% e 20% em resíduo de vidro, em relação ao agregado miúdo. A escolha do circuito equivalente foi diferente dependendo da quantidade de materiais utilizados, para a amostra referência foi utilizado um circuito resistivo em série com um segundo circuito em paralelo composto por uma resistência R e um elemento de fase CPE. Para as misturas com resíduo de vidro foi acrescentado mais um circuito paralelo R/CPE. Também foram realizadas micrografias obtidas através da microscopia eletrônica de varredura (MEV) e espectrometria de energia dispersiva de raios X (EDS). Os resultados demostraram que a amostra referência apresenta um circuito proposto por Randles e as amostras 5% a 20% apresentam um circuito equivalente de Christensen. A análise do EDS para todas as amostras observou-se como o Fe que é um dos elementos constituintes regulares da matriz de cimento e também o Ca, C, Mg, Na, Al, Si que são os elementos constituintes do vidro.

show abstract

Section: Resultsunclassified

Estudo da corrosão e da microestrutura no compósito cimentício autoadensável com substituição do agregado miúdo por resíduo de vidro

Torres

Melo

Ribeiro

et al. 2022

RSD

View full text Add to dashboard Cite

show abstract

“…The dense and protective rust layer could form easier in the bimodal ferrite steel than in dual-phase steel. This was mostly because a large number of defects existed in martensite, which facilitated the occurrence and development of corrosion [5,6]. Meanwhile, the Figure 7b shows that the Volta potential of martensite was higher than the Volta potential of the surrounding ferrite and that the Volta potential difference between martensite and ferrite was large, which improved the electrochemical activity of the dual-phase microstructure and accelerated the progress of corrosion [19,20].…”

Section: Corrosion Behavior Of Bimodal Ferrite Steel and Dual-phase Smentioning

confidence: 98%

“…However, its corrosion resistance is not ideal because the potential difference between martensite and ferrite is large and abundant defects exist in martensite [3,4]. Single ferrite with few defects possesses remarkable resistance to weathering [5], but its strength is lower than that of dual-phase steel.…”

Section: Introductionmentioning

confidence: 99%

Study on Microstructure and Properties of Bimodal Structured Ultrafine-Grained Ferrite Steel

Niu

Zhang

et al. 2017

Metals

View full text Add to dashboard Cite

Abstract:The objective of the study research was to obtain bimodal structured ultrafine-grained ferrite steel with outstanding mechanical properties and excellent corrosion resistance. The bimodal microstructure was fabricated by the cold rolling and annealing process of a dual-phase steel. The influences of the annealing process on microstructure evolution and the mechanical properties of the cold-rolled dual-phase steel were investigated. The effect of bimodal microstructure on corrosion resistance was also studied. The results showed that the bimodal characteristic of ferrite steel was most apparent in cold-rolled samples annealed at 650 • C for 40 min. More importantly, due to the coordinated action of fine-grained strengthening, back-stress strengthening, and precipitation strengthening, the yield strength (517 MPa) of the bimodal microstructure improved significantly, while the total elongation remained at a high level of 26%. The results of corrosion experiments showed that the corrosion resistance of bimodal ferrite steel was better than that of dual-phase steel with the same composition. This was mainly because the Volta potential difference of bimodal ferrite steel was smaller than that of dual-phase steel, which was conducive to forming a protective rust layer.

show abstract

“…EIS measurements were conducted after about 15 min, due to a quasi steady state being attained. This is commonly practiced intending to standard all measures and to stabilize distortions and oscillations affecting the resulting measurements [38,48,[59][60][61]. EIS experiments were conducted (~40 min) before the potentiodynamic polarization techniques were conducted (~1 h).…”

Section: Eis and Potentiodynamic Polarization Measurementsmentioning

confidence: 99%

EIS Investigation of the Corrosion Behavior of Steel Bars Embedded into Modified Concretes with Eggshell Contents

Meyer

Menezes

Bonatti

et al. 2022

Metals

View full text Add to dashboard Cite

This investigation is focused on evaluation of the corrosion behavior of embedded steel bars (SB) into concretes. Conventional and modified concretes with eggshell are prepared. Although the effect of calcium carbonate on mechanical behavior is recognized and reported, their effects as eggshell (ES) particles replacing portions of sand and cement contents are reasonably scarce. Corrosion behavior is evaluated by electrochemical impedance spectroscopy (EIS) and the potentiodynamic polarization technique. Equivalent circuit and porous electrode behavior are also considered. The novelty concerns a promising use of concrete with ES content to maintain corrosion resistance concatenated with reasonable structural properties. For this purpose, three distinct concrete mixtures are proposed, i.e., a reference and two modified concretes. One replaces 10 wt.% with cement and another 10 wt.% with sand content. It is found that porous electrode behavior helps to predict the corrosion mechanism. Finer ES particles in concrete mixture provides a rapidly passivation on rebar. This reflects positively in corrosion current density after long-term immersion. Additionally, an environmentally friendly aspect associated with economical factor constitutes a promise use of the concrete.

show abstract

Electrochemical corrosion behaviour of a Ti‐IF steel and a SAE 1020 steel in a 0.5 M NaCl solution

Cited by 19 publications

References 41 publications

Estudo da corrosão e da microestrutura no compósito cimentício autoadensável com substituição do agregado miúdo por resíduo de vidro

Estudo da corrosão e da microestrutura no compósito cimentício autoadensável com substituição do agregado miúdo por resíduo de vidro

Study on Microstructure and Properties of Bimodal Structured Ultrafine-Grained Ferrite Steel

EIS Investigation of the Corrosion Behavior of Steel Bars Embedded into Modified Concretes with Eggshell Contents

Contact Info

Product

Resources

About