Study on the Anticorrosion of LD-2 Compound Inhibitor on Reinforcing Steel in Seawater

Authors

Rong-gui DU, Dept. of Chem., Dept. of Materials Sci., Inst. of Phys. Chem., State Key Lab. for Phys. Chem. of Solid Sur., Xiamen Univ., Xiamen 361005, ChinaFollow
Zhou-cheng WANG, Dept. of Chem., Dept. of Materials Sci., Inst. of Phys. Chem., State Key Lab. for Phys. Chem. of Solid Sur., Xiamen Univ., Xiamen 361005, China
Ruo-shuang HUANG, Dept. of Chem., Dept. of Materials Sci., Inst. of Phys. Chem., State Key Lab. for Phys. Chem. of Solid Sur., Xiamen Univ., Xiamen 361005, China
Rong-gang HU, Dept. of Chem., Dept. of Materials Sci., Inst. of Phys. Chem., State Key Lab. for Phys. Chem. of Solid Sur., Xiamen Univ., Xiamen 361005, China
Bing ZHAO, Dept. of Chem., Dept. of Materials Sci., Inst. of Phys. Chem., State Key Lab. for Phys. Chem. of Solid Sur., Xiamen Univ., Xiamen 361005, China
Jian-guang TAN, Dept. of Chem., Dept. of Materials Sci., Inst. of Phys. Chem., State Key Lab. for Phys. Chem. of Solid Sur., Xiamen Univ., Xiamen 361005, China
Chang-jian LIN, Dept. of Chem., Dept. of Materials Sci., Inst. of Phys. Chem., State Key Lab. for Phys. Chem. of Solid Sur., Xiamen Univ., Xiamen 361005, China

Corresponding Author

Rong-gui DU(rgdu@xmu.edu.cn)

Abstract

The effect of LD-2 compound inhibitor developed in our laboratory on its anticorrosion action on the reinforcing steel in concrete immersed in seawater was shown in this paper. The corrosion behavior of the reinforcing steel in seawater was studied using electrochemical techniquesand immersion tests. The polarization curve of the reinforcing steel immersed in seawater showedthe free corrosion potential of the steel increased by 0. 220 V (vs. SCE), and the corrosion current decreased by two orders of magnitude by adding 25 g⋅L^-1 compound inhibitor to the seawater. The potentiodynamic anodic polarization curve of reinforcing steel in the seawater with compound inhibitor exhibited a passive range and the breakdown potential of the steel increased by 0.900 V as against in the seawater without inhibitor. Being immersed in the seawater over 24 months, the surface of the reinforcing steel in concrete with LD-2 compound inhibitor content of 1.0 %~1. 5 % of the cement mass was intact, while pitting corrosion occurred on the surface ofthe steel in concrete without inhibitor for 6 months. LD-2 compound inhibitor is an effective corrosion inhibitor for steel in concrete in seawater and in those environments contained chloride ionsfor the above experimental results.

Keywords

Reinforced concrete, Corrosion, Seawater, Inhibitor

DOI Link

https://doi.org/10.61558/2993-074X.3272

Publication Date

2001-11-28

Online Available Date

2001-11-28

Revised Date

2001-11-20

Received Date

2001-06-08

Recommended Citation

Rong-gui DU, Zhou-cheng WANG, Ruo-shuang HUANG, Rong-gang HU, Bing ZHAO, Jian-guang TAN, Chang-jian LIN. Study on the Anticorrosion of LD-2 Compound Inhibitor on Reinforcing Steel in Seawater[J]. Journal of Electrochemistry, 2001 , 7(4): 494-500.
DOI: 10.61558/2993-074X.3272
Available at: https://jelectrochem.xmu.edu.cn/journal/vol7/iss4/17