Effect of pH on pitting corrosion of stainless steel welds in alkaline salt water

Li, L.; Dong, Chaofang; Xiao, Kui; Yao, Jizheng; Li, X.G.

doi:10.1016/j.conbuildmat.2014.06.090

Cited by 53 publications

(18 citation statements)

References 27 publications

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“…Those surfaces exhibit different stress levels, and, particularly, highly stressed areas [40), thus limiting the protective abilit y of the passive oxides [13). Other research groups have also chosen this equivalent circuit to simulate the electrochemical behaviour of active and passive stainless steel in solution and in mortar [6, 48,49). The work carried out in this study confi rms that this model is useful to simulate the electrochemical behaviour of pas sive stainless steel corrugated bars embedded in mortar (Fig.…”

Section: Resultsmentioning

confidence: 83%

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: Resultsmentioning

confidence: 83%

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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“…The larger the diameter of the semicircle id, the higher the resistance Rp, resulting in a lower corrosion rate [30]. The Nyquist plot represents the complex plane, and an Equivalent circuit for respective zones of CT and HT specimens is electrically fitted for the interpretation of the AC impedance spectra [31]. The most favorable model was selected among various options and used in the corrosion current calculation.…”

Section: Polarization Analysis and Electrochemical Impedance Spectrosmentioning

confidence: 99%

Electrochemical Impedance Analysis on Cryogenically Treated Dissimilar Metal Welding of 316L Stainless Steel and Monel 400 Alloy Using GTAW

Mani

Karthikeyan

Kannan

2019

Metals

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An attempt was made to study the corrosion behavior of austenitic stainless-steel SS 316L/Monel 400 alloy dissimilar metal welded joints using gas tungsten arc welding. This combination of welded joints is used in re-heaters and heat exchangers in gas processing and oil refining industries. The welded specimens were subjected to post-weld treatments, such as annealing and deep cryogenic treatment. The welded specimens were sectioned into five different parts: SS 316L base, SS 316L HAZ, weld, Monel HAZ, and Monel base. The polarization method and electrochemical impedance analysis were used to analyze the corrosion resistance in a NaCl solution. A polarization graph, Nyquist plot, and Bode plot were constructed for all regions, separately, for the heat-treated and cryo-treated specimens, to analyze the variation in corrosion resistance in different regions, and then the results were compared. To validate the results of electrochemical impedance analysis, scanning electron microscope (SEM) and energy dispersive spectroscope (EDS) analyses were also performed. The results indicated that the cryo-treated specimens have better corrosion resistance when compared to the annealed ones. Weld region on both specimens exhibited better corrosion resistance when compared to other zones.

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“…The process of corrosion of stainless steel in salt water with an alkaline pH value has been investigated in article [6]. The authors have found out that increasing of the pH of water leads to a decrease in the rate of corrosion.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…Scientific data on the corrosive aggressiveness of chloride ions in water solutions with respect to ferrous metals are very numerous [1][2][3][4][5][6][7][8][9][10]. Most of the research in this direction has been carried out for alloy steels.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Study into the influence of concentration of ions of chlorine and temperature of circulating water on the corrosion stability of carbon steel and cast iron

Pancheva

Reznichenko

Miroshnichenko

et al. 2017

EEJET

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Effect of pH on pitting corrosion of stainless steel welds in alkaline salt water

Cited by 53 publications

References 27 publications

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

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

Electrochemical Impedance Analysis on Cryogenically Treated Dissimilar Metal Welding of 316L Stainless Steel and Monel 400 Alloy Using GTAW

Study into the influence of concentration of ions of chlorine and temperature of circulating water on the corrosion stability of carbon steel and cast iron

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