Corrosion

Corrosion is one of the major problems affecting the durability of reinforced concrete (RC) structures. This paper investigates the effect of rebar corrosion on the performance of reinforced self-consolidating concrete (SCC) members and the effectiveness of repair. A control RC member, which has no corrosion problem, was prepared to compare against corroded and repaired members. A number of reinforced concrete members having up to 50% corrosion level were constructed and tested to study the effect of corrosion on the structural performance of RC members. The beams with corrosion problem were repaired using carbon fiber reinforced polymer (CFRP) sheets and U-wraps. All of the beams constructed, which are either not repaired or repaired, in this study were tested under two static line loads until failure. The effect of corrosion and effectiveness of repairing technique were assessed by evaluating the performance in terms of load carrying capacity, deflection, and ductility. Test results revealed that as the corrosion level increases, the loss in load carrying capacity increases. Repairing using CFRP improved the performance of corroded members. For example, when 50% corrosion level was achieved, the beam lost approximately 57% of its load carrying capacity, but when it was repaired, it recovered about 42% of its load carrying capacity.

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“…The resulting rust is a complicated and uncontrolled mixture of iron oxide hydrates, based on competing equilibria [32].…”

Section: Introductionmentioning

confidence: 99%

Strengthening of Corroded Reinforced SCC-RAP Members with CFRP

Abdel-Mohti

Shen

2016

Fibers

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“…The composite‐material disks were immersed in 1 M NaCl solution, and the development of the corrosion process was monitored. Expectedly, the NaCl solution accelerates the corrosion of iron by cathodic oxygen reduction, anodic metal dissolution, and the subsequent formation of iron oxide 40. After 2 h of immersion, an extensive amount of bubbles formed on the surface of the Fe disk, while no bubbles were observed on the surface of the doped disks (Figure 5).…”

Section: Resultsmentioning

confidence: 99%

An Fe(CO)₅‐Thermolysis‐Based Process for the Preparation of Polymer@Iron Composite Powders with High Corrosion Resistance

2012

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“…The reaction type and the corresponding products depend on the acidity or basicity of the aqueous media. Thus, products like Fe 0 , Fe 2+ , Fe 3+ , Fe 2 O 4 , Fe(OH) 2 + , FeO 4 2− , HFeO 2− , and FeO(OH) have been previously reported . As explained previously, the removal capability of the hydrogel was evaluated at pH:ASS 4, 7.5, and 11 determining the metallic species formed during the process.…”

Section: Rust Removal Mechanismmentioning

confidence: 92%

Tuning the pH‐responsiveness capability of poly(acrylic acid‐co‐itaconic acid)/NaOH hydrogel: Design, swelling, and rust removal evaluation

Olvera‐Sosa

Guerra‐Contreras

Gómez‐Durán

et al. 2019

J of Applied Polymer Sci

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The swelling behavior of poly(acrylic acid‐co‐itaconic acid)/NaOH hydrogel as well as its ability for iron and copper rust removal was studied and established for the first time. Through an experimental design, the influence of the synthesis parameters on hydrogel response was determined. It was found that pH‐responsiveness dependence of hydrogel determines its application. In alkaline media, the hydrogel acted as superabsorbent, while in acidic, the most outstanding property was its pickling capability that allowed to clean carbon steel and copper metallic surfaces. Infrared, thermogravimetry, and scanning electron microscopy were performed to determine copolymer formation, thermal properties, and morphology. Metallic crystallographic phases formed during the corrosion processes were determined by X‐ray diffractometer. Hydrogel adhesiveness followed by diffusion and dissolution of metal oxides species was identified as the main steps in the rust removal mechanism. This method offers a new, environmentally friendly perspective to eliminate corrosion from metallic surfaces compared with traditional strategies. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48403.

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Corrosion

Cited by 15 publications

References 104 publications

Strengthening of Corroded Reinforced SCC-RAP Members with CFRP

Strengthening of Corroded Reinforced SCC-RAP Members with CFRP

An Fe(CO)₅‐Thermolysis‐Based Process for the Preparation of Polymer@Iron Composite Powders with High Corrosion Resistance

Tuning the pH‐responsiveness capability of poly(acrylic acid‐co‐itaconic acid)/NaOH hydrogel: Design, swelling, and rust removal evaluation

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Corrosion

Cited by 15 publications

References 104 publications

Strengthening of Corroded Reinforced SCC-RAP Members with CFRP

Strengthening of Corroded Reinforced SCC-RAP Members with CFRP

An Fe(CO)5‐Thermolysis‐Based Process for the Preparation of Polymer@Iron Composite Powders with High Corrosion Resistance

Tuning the pH‐responsiveness capability of poly(acrylic acid‐co‐itaconic acid)/NaOH hydrogel: Design, swelling, and rust removal evaluation

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An Fe(CO)₅‐Thermolysis‐Based Process for the Preparation of Polymer@Iron Composite Powders with High Corrosion Resistance