Corrosion behaviour of innovative stainless steels in mortar

García‐Alonso, M. C.; González, José Antonio Varela; Miranda, J. M.; Escudero, M.L.; Correia, M.J.; Salta, Maria; Bennani, A.

doi:10.1016/j.cemconres.2007.08.010

Cited by 58 publications

(26 citation statements)

References 20 publications

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“…This chloride was selected as calcium oxide is the main compound of cement, and this way no new cations were added. Its concentration is slightly higher than those sometimes used to test the behaviour of carbon steel [39] or galvanised steel [36] in mortar, and it is inside the range of that used to test some stainless steels [29].…”

Section: Methodsmentioning

confidence: 95%

“…As has been previ ously mentioned, this value is typical of the corrosion rate for car boo steel reinforcements under the exposure conditions considered in the study. Moreover, it is also a value inside the range of the usual current densities used to define the pitting potential or to compare the corrosion behaviour of stainless steel reinforcements [ 11,20,29).…”

Section: Resultsmentioning

confidence: 99%

“…The length from the end of the corrugated bar to the bottom of the mortar sample was also 1.5 cm. The surface of the bars exposed to the mortar-air interface was isolated to avoid interference in the study (mainly carbonation) as other authors have previously done [29]. The exposed length of the bar in mortar was always 3 cm.…”

Section: Methodsmentioning

confidence: 99%

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Corrugated stainless steels embedded in mortar for 9years: Corrosion results of non-carbonated, chloride-contaminated samples

Bautista

Paredes

Velasco

et al. 2015

Construction and Building Materials

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Institutional RepositoryThis is a postprint version of the following published document:A. Bautista (et al.). HI GHLIGHTS• 5 corrugated stainless steel grades are studied in chloride contaminated mortars.• Ecorr and E IS are used for monitoring, and polarizations tests are also carried out • Spo ntaneous corrosion only appears in low Ni austenitic 520430 at partial immersion.• 532205 duplex does not show any sign of corrosion even at anodic high polarizations. ABSTRA C T Keywords: Stainless steel Steel reinforced mortar EISMortar sampl es reinforced with 5 different corrugated stainless steels were tested for 9 years in 2 differ ent conditions: partial immersion (P I) in 3. 5% NaC l, and chloride addition to the mortar and exposure to high relative humidity (H R H) . The monitoring during the exposures was carried out with corrosi on potential (Ecorr) and electrochemical impedance spectroscopy (E IS) measurements. A year before finishing (after 8 years of exposure), the reinforced mortar samples were anodically polarised to obtain more infor mation about the pitting resistance of the passi ve layers formed under the different conditions. The last year of exposure was established to study the pr ogress or repassivation of the pits. The P I is the most aggressive testing condition and it causes low intensity corrosion in 520430 austenitic stainless steel after 7 years of exposure. The 532205 duplex stainless steel shows very good corrosion behaviour.

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Section: Methodsmentioning

confidence: 95%

Section: Resultsmentioning

confidence: 99%

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Corrugated stainless steels embedded in mortar for 9years: Corrosion results of non-carbonated, chloride-contaminated samples

Bautista

Paredes

Velasco

et al. 2015

Construction and Building Materials

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“…It has been proved that the simultaneous use of stainless steel and CS reinforcements in the same structure does not imply any risk of galvanic corrosion [10][11][12]. Moreover.…”

Section: Introductionmentioning

confidence: 99%

“…However. the critical chloride levels that cause pitting corrosion in corrugated austenitic and duplex stainless steels are at least 10 times higher than those of carbon steel (CS) reinforcements (10), so they are an interesting alternative to prevent corrosion problems in reinforced concrete structures.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2016

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Institutional RepositoryThis is a postprint version of the following published document:A. Bautista (et al.). Three different stainless steel corrugated grades ( UNS 520430, 530403 and 532205) were similar welded to stainless steel bars with the same composition and dissimilar welded to carbon steel ( CS) . After deaning the welding oxides by sandblasting, the reinforcements were embedded in mortar with chlorides and some of the samples were carbonated. Corrosion activity was monitored using corrosion potential ( Ecorr) and electrochemical impedance spectroscopy( EIS) . After 8 years of exposure, the samples were anodically polarized. Visual evaluation of the attack was performed after another additional year of exposure. Similar welded stainless steels offer a good durability if they have been sandblasted, except for 520430 when it is embedded in carbonated mortar with chlorides. Dissimilar welded steels are active since the beginning of the exposure for both studied conditions, but sandblasting reduces the corrosion rate of CS compared to non-welded CS bars. C. Welding

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