Effect of rust inhibitor on the composition of steel passive film in carbonized concrete

Case Studies in Construction Materials

Yilin Song¹  Qun Guo²  Xiaozhen Li³  Junzhe Liu³ 

[1] School of Architectural Engineering Institute, Jinhua Polytechnic, Jinhua 321017, China;School of Architecture Engineering, Qingdao Agricultural University, Qingdao 266109, China;School of Civil and Environmental Engineering, Ningbo University, Ningbo 315211, China;

关键词: Carbonation solution;    Rust inhibitor;    Passive film;    Composition;   

DOI  :  

来源: DOAJ

【 摘 要 】

The composition and characteristics of the passive film formed in the simulated carbonation solution with the concentration of 1.0% and 2.0% rust inhibitor were studied by X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD). The formation mechanism of steel passive film under the action of rust inhibitor was expounded. The results showed that the anticorrosion performance was the best and stable passive film was formed on the steel surface when the content of rust inhibitor was 2.0%; under the action of rust inhibitor, the main compositions of passive film on the steel surface were Fe2O3 and FeOOH. Among anodic rust inhibitors, Na2MoO4 was more effective than Na2CrO4. Between cathodic rust inhibitors, the anticorrosion performance of benzotriazole (BTA) was better than N-N dimethyl ethanolamine (DMEA). Among the composite rust inhibitors, the corrosion resistance of Na2MoO4 + BTA group was superior, and the corrosion resistance of Na2MoO4 + DMEA group was the worst. The composite rust inhibitor was better than the single rust inhibitor, and the inhibition efficiency was the highest when Na2MoO4 and BTA were mixed together.

【 授权许可】

Unknown