Study on the Chloride Threshold and Risk Assessment of Rebar Corrosion in Simulated Concrete Pore Solutions under Applied Potential

被引：7

作者：

An, Hongze ^{[1
]}

Meng, Guozhe ^{[1
,2
]}

Wang, Yanqiu ^{[1
]}

Wang, Junyi ^{[1
]}

Liu, Bin ^{[1
]}

Wang, Fuhui ^{[1
,3
]}

机构：

[1] Harbin Engn Univ, Minist Educ, Corros & Protect Lab, Key Lab Superlight Mat & Surface Technol, Harbin 150001, Peoples R China

[2] Sun Yat Sen Univ, Southern Marine Sci & Engn Guangdong Lab, Zhuhai 519082, Peoples R China

[3] Northeastern Univ, Sch Mat Sci & Engn, Key Lab Anisotropy & Texture Mat MoE, Shenyang 110819, Peoples R China

来源：

COATINGS | 2020年 / 10卷 / 05期

基金：

中国国家自然科学基金;

关键词：

pitting corrosion; polarization; cumulative probability; applied potential; chloride threshold; 316L STAINLESS-STEEL; REINFORCED-CONCRETE; ENVIRONMENTAL-FACTORS; INDUCED DEPASSIVATION; BEHAVIOR; CARBONATION; INITIATION; INGRESS; SYSTEMS; LEVEL;

D O I：

10.3390/coatings10050505

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The pitting corrosion behavior of HRB400 steel in various simulated concrete environments was investigated by the combination of polarization curves and statistical method. The results indicated that the chloride concentration threshold ([Cl-](th)) for pitting of the steel was greatly affected by pH when the applied potential exists, which is always caused by random stray current. The interaction of applied potential and chloride concentration on the pitting behavior was discussed. Finally, pitting-risk-evaluation diagrams were built up, which could be easily used to assess the pitting risk of reinforcing bars under the chloride-containing environment with stray current.

引用

页数：14

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