A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Corrosion inhibition effect of sodium tri-polyphosphate on reinforcing steel in simulated concrete pore solution with different pHs
Highlights Sodium tri-polyphosphate (STPP) demonstrated an inhibition effect on steel rebars in simulated pore solution polluted by NaCl. Increasing STPP concentration led to inhibition efficiencies up to at least 70% at all studied pHs. After adding STPP, unstable precipitates were substituted with a combination of oxide and adsorbed film on the rebar surface. Theoretical calculations confirmed the chemisorption of STPP molecules on the slab.
Abstract The inhibition activity of sodium tri-polyphosphate (STPP) for reinforcing steel in chloride-contaminated alkaline solution with pH ranging from 12.5 to 8.5 was explored via electrochemical measurements and FESEM-EDS surface analysis. Based on the results, STPP, acting as a mixed-type corrosion inhibitor, provided the inhibition efficiencies up to 70% at all studied pHs, thus increasing the corrosion resistance of the steel rebars (at least four times) and reducing the corrosion rate significantly. The DFT and Ab-intio simulations suggested that this inhibition behavior was related to the STPP adsorption via solid chemical bonds between the oxygen heteroatoms of STPP and Fe of the metal surface.
Corrosion inhibition effect of sodium tri-polyphosphate on reinforcing steel in simulated concrete pore solution with different pHs
Highlights Sodium tri-polyphosphate (STPP) demonstrated an inhibition effect on steel rebars in simulated pore solution polluted by NaCl. Increasing STPP concentration led to inhibition efficiencies up to at least 70% at all studied pHs. After adding STPP, unstable precipitates were substituted with a combination of oxide and adsorbed film on the rebar surface. Theoretical calculations confirmed the chemisorption of STPP molecules on the slab.
Abstract The inhibition activity of sodium tri-polyphosphate (STPP) for reinforcing steel in chloride-contaminated alkaline solution with pH ranging from 12.5 to 8.5 was explored via electrochemical measurements and FESEM-EDS surface analysis. Based on the results, STPP, acting as a mixed-type corrosion inhibitor, provided the inhibition efficiencies up to 70% at all studied pHs, thus increasing the corrosion resistance of the steel rebars (at least four times) and reducing the corrosion rate significantly. The DFT and Ab-intio simulations suggested that this inhibition behavior was related to the STPP adsorption via solid chemical bonds between the oxygen heteroatoms of STPP and Fe of the metal surface.
Corrosion inhibition effect of sodium tri-polyphosphate on reinforcing steel in simulated concrete pore solution with different pHs
Alizadeh, Roghayeh (author) / Naderi, Reza (author) / Saremi, Mohsen (author) / Hamidi, Hoda (author) / Shojaei, Fazel (author)
2022-11-17
Article (Journal)
Electronic Resource
English
Inhibition Effect of Na~2PO~3F on Corrosion of Reinforcing Steel in Simulated Concrete Pore Solution
| British Library Online Contents | 2007
Corrosion of reinforcing steel in simulated concrete pore solutions
| British Library Online Contents | 2004
| British Library Online Contents | 2011
Corrosion Inhibition Property of Sodium Pyrophosphate in Simulated Concrete Pore Solution
| British Library Online Contents | 2012