Corrosion Inhibition Effect of Sodium Pyrophosphate on Carbon Steel in Chloride Contaminated Mortar

被引：5
作者：
Xu, Yiwen [1 ]
Zhu, Chao [1 ]
Chen, Shengli [3 ]
Zhang, Yiji [1 ]
Wu, Tong [1 ]
Lu, Xiangyu [1 ,2 ]
Wang, Mai [4 ]
Feng, Xingguo [1 ,2 ]
机构：
[1] Hohai Univ, Jiangsu Key Lab Coast Ocean Resources Dev & Envir, Nanjing 210098, Jiangsu, Peoples R China
[2] Chengdu Univ Technol, State Key Lab Geohazard Prevent & Geoenvironm Pro, Chengdu 610059, Sichuan, Peoples R China
[3] CNOOC Informat Technol Co Ltd, Oceanog Informat Ctr, Beijing 100013, Peoples R China
[4] Air Force Command Coll, Beijing 100089, Peoples R China
来源：
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE | 2019年 / 14卷 / 10期
基金：
中国国家自然科学基金;
关键词：
corrosion inhibitor; sodium pyrophosphate; mortar; carbon steel; electrochemical tests; ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY; SUPRAMOLECULAR COMPLEX; PHOSPHATE IONS; MILD-STEEL; CONCRETE; BEHAVIOR; REINFORCEMENT; RESISTANCE; THRESHOLD; REBARS;
D O I：
10.20964/2019.10.25
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Reinforced concrete structures suffered severe degradation for the corrosion of the steel bar, and the utilization of phosphate corrosion inhibitors was an eco-friendly as well as an effective method to reduce the steel corrosion. Sodium pyrophosphate (SPP) was used to inhibit the corrosion of the steel bar in the chloride contaminated mortar. The corrosion behavior of the rebar in mortars containing different concentrations of SPP was investigated via electrochemical tests. The results showed that the SPP can efficiently hinder the corrosion of the rebar in the chloride-containing mortars. In the samples containing SPP with a concentration of 0.6% by the weight of cement, the corrosion of rebar was most effectively inhibited. The excessive addition of SPP could cause the degradation of mortar cover layer and reduce its inhibition efficiency.
引用
收藏
页码：9726 / 9740
页数：15
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