Welded, sandblasted, stainless steel corrugated bars in non-carbonated and carbonated mortars: A 9-year corrosion study

Bautista, A.; Paredes, Edgar; Alvarez, S.M.; Velasco, F.

doi:10.1016/j.corsci.2015.10.029

Cited by 52 publications

(7 citation statements)

References 49 publications

(88 reference statements)

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“…Moreover, specific characteristics of the surface that affect its corrosion behavior (such as phase transformation or microstructural changes [4,5]) are difficult to study in some real components with traditional liquid cell configurations. Phenomena originated during the assembly of metallic components, such as stresses or welds [6], may also affect their corrosion resistance and it is interesting to carry out studies in conditions as realistic as possible.…”

Section: Introductionmentioning

confidence: 99%

Design of gel electrolytes for electrochemical studies on metal surfaces with complex geometry

Monrrabal

Guzmán

Hamilton

et al. 2016

Electrochimica Acta

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Section: Introductionmentioning

confidence: 99%

Design of gel electrolytes for electrochemical studies on metal surfaces with complex geometry

Monrrabal

Guzmán

Hamilton

et al. 2016

Electrochimica Acta

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“…The equivalent circuit used to simulate the results is similar to the one already used to simulate the electrochemical behavior of corroding steel in concrete [31,33].…”

Section: Resultsmentioning

confidence: 99%

Influence of the microstructure of TMT reinforcing bars on their corrosion behavior in concrete with chlorides

Bautista

Pomares

González

et al. 2019

Construction and Building Materials

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Thermomechanically treated (TMT) carbon steel bars, often known as "TempCore" bars, are commonly used as reinforcements in concrete structures. TMT causes the formation of a martensite case in the outer surface of the bars, increasing their hardness, while the remaining ferritic-perlitic core maintains the typical ductility of hot rolled bars. In this work, the effect of this TMT induced microstructure on the development of pitting attacks in chloride media has been analyzed in depth. Electrochemical impedance spectroscopy (EIS) measurements and polarization curves have been carried out in simulated pore solutions to understand the effect of the presence of different phases in the microstructure and to quantify the strength of the galvanic couple that the outer martensite can form with the inner core. Moreover, accelerated corrosion tests in chloride contaminated concrete slabs have also been performed. Bars from six different slabs where corrosive attack has been forced for different times have been studied. The shape of the main pits in the bars corroded in concrete has been analyzed through optoelectronic microscopy and the results obtained prove that the depth of the attack is related to the microstructure of the TMT bars.

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“…In these figures, the relationship between E corr and corrosion probability proposed in the ASTM C876 standard is included. The standard proposes this criterion for non-coated carbon steel reinforcements, but previous results of our group [2,3,35,36] prove its utility also for monitoring stainless steel reinforcements.…”

Section: Resultsmentioning

confidence: 99%

Influence of the Alkaline Reserve of Chloride-Contaminated Mortars on the 6-Year Corrosion Behavior of Corrugated UNS S32304 and S32001 Stainless Steels

Bautista

Velasco

Torres-Carrasco

2019

Metals

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The durability of two lean corrugated duplex stainless steel (UNS S32304 and S32001) bars manufactured for concrete reinforcement was studied in four different corrosive conditions. These duplex stainless steels are more economical than the most traditional, well-known duplex grade steels (UNS S32205). The research was carried out in mortar samples for six years. In half of the samples, the alkaline reserve had been previously decreased, and their pH was slightly below 12, while in the other half, the pH close to the bars remained as-manufactured. Moreover, there were samples with modified and non-modified alkaline reserve where chlorides had been previously added to the mortar which were exposed to high relative humidity. In other samples—which were partially immersed in 3.5% NaCl—the chlorides entered through the mortar by natural diffusion. The electrochemical behavior of the reinforcements in these conditions was periodically monitored through corrosion potential (Ecorr) and electrochemical impedance spectroscopy (EIS) measurements during the whole testing period. The samples were anodically polarized at the end of the exposure. The results prove that the decrease in the alkaline reserve of the mortars can affect the corrosion behavior of the studied lean duplex in environments with high chloride concentrations. The duplex microstructure of the reinforcements makes it so that the corrosion proceeds by selective attack of the phases.

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Welded, sandblasted, stainless steel corrugated bars in non-carbonated and carbonated mortars: A 9-year corrosion study

Cited by 52 publications

References 49 publications

Design of gel electrolytes for electrochemical studies on metal surfaces with complex geometry

Design of gel electrolytes for electrochemical studies on metal surfaces with complex geometry

Influence of the microstructure of TMT reinforcing bars on their corrosion behavior in concrete with chlorides

Influence of the Alkaline Reserve of Chloride-Contaminated Mortars on the 6-Year Corrosion Behavior of Corrugated UNS S32304 and S32001 Stainless Steels

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