Corrosion inhibition effect of sodium tri-polyphosphate on reinforcing steel in simulated concrete pore solution with different pHs

被引：20

作者：

Alizadeh, Roghayeh ^{[1
]}

Naderi, Reza ^{[1
]}

Saremi, Mohsen ^{[1
]}

Hamidi, Hoda ^{[2
]}

Shojaei, Fazel ^{[3
]}

机构：

[1] Univ Tehran, Fac Engn, Sch Met & Mat Engn, Tehran, Iran

[2] KN Toosi Univ Technol, Dept Phys, Tehran, Iran

[3] Persian Gulf Univ, Fac Nano & Biosci & Technol, Dept Chem, Bushehr, Iran

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2023年 / 363卷

关键词：

Sodium tri-polyphosphate; Corrosion inhibition; Simulated concrete pore solution; Electrochemical measurements; Surface analysis; DFT; ZINC ALUMINUM POLYPHOSPHATE; PHOSPHATE-BASED INHIBITOR; CARBON-STEEL; MILD-STEEL; ALKALINE-SOLUTIONS; PITTING CORROSION; ELECTROCHEMICAL-BEHAVIOR; ANTICORROSION PROPERTIES; CHLORIDE; REBARS;

D O I：

10.1016/j.conbuildmat.2022.129819

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The inhibition activity of sodium tri-polyphosphate (STPP) for reinforcing steel in chloride-contaminated alka-line 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 in-hibition behavior was related to the STPP adsorption via solid chemical bonds between the oxygen heteroatoms of STPP and Fe of the metal surface.

引用

页数：16

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