Comparative Study on Corrosion Protection of Reinforcing Steel by Using Amino Alcohol and Lithium Nitrite Inhibitors

Materials

Han-Seung Lee²  Hwa-Sung Ryu²  Won-Jun Park¹  Mohamed A. Ismail² 

[1] Sustainable Building Research Center, Hanyang University, 1271 Sa 3-dong, Sangrok-gu, Ansan 426-791, Korea; E-Mail:;Department of Architectural Engineering, Hanyang University, 1271 Sa 3-dong, Sangrok-gu, Ansan 426-791, Korea; E-Mails:

关键词: reinforced concrete;    reinforcing steel corrosion;    amino alcohol inhibitor;    electrochemical evaluation;   

DOI  :  10.3390/ma8010251

来源: mdpi

【 摘 要 】

In this study, the ability of lithium nitrite and amino alcohol inhibitors to provide corrosion protection to reinforcing steel was investigated. Two types of specimens—reinforcing steel and a reinforced concrete prism that were exposed to chloride ion levels resembling the chloride attack environment—were prepared. An autoclave accelerated corrosion test was then conducted. The variables tested included the chloride-ion concentration and molar ratios of anti-corrosion ingredients in a CaOH₂-saturated aqueous solution that simulated a cement-pore solution. A concentration of 25% was used for the lithium nitrite inhibitor LiNO₂, and an 80% solution of dimethyl ethanolamine ((CH₃)₂NCH₂CH₂OH, hereinafter DMEA) was used for the amino alcohol inhibitor. The test results indicated that the lithium nitrite inhibitor displayed anti-corrosion properties at a molar ratio of inhibitor of ≥0.6; the amino alcohol inhibitor also displayed anti-corrosion properties at molar ratios of inhibitor greater than approximately 0.3.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.