HRB400和HRB400M钢筋在直流干扰下在混凝土中的腐蚀行为。

Corrosion behavior of HRB400 and HRB400M steel bars in concrete under DC interference.

作者信息

Ding Qingmiao, Gao Yuning, Liu Ruiyang, Li Yaozhi, Jin Lei, Ma Han

机构信息

Aeronautical Engineering Institute, Civil Aviation University of China, Tianjin, 300300, People's Republic of China.

China National Offshore Oil Corporation (CNOOC) Tianjin Pipeline Engineering Technology Co., Ltd, Tianjin, 300452, People's Republic of China.

出版信息

Sci Rep. 2021 Dec 13;11(1):23871. doi: 10.1038/s41598-021-03412-7.

DOI:10.1038/s41598-021-03412-7

PMID:34903828

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8668946/

Abstract

The influence of direct current interference on the corrosion behavior of HRB400 and HRB400M steel bars in simulated concrete solution was studied using methods such as weight loss experiment, electrochemical experiment, surface technology and product analysis. The research results showed that with the increase of DC interference voltage, the corrosion rates of HRB400 and HRB400M steel bars would increase. The corrosion resistance of HRB400M steel bars was better than HRB400 steel bars under the experimental conditions. In addition, direct current interference could cause damage to the corrosion product layer on the surface of HRB400 steel bars and HRB400M steel bars. And the corrosion form and corrosion product types of HRB400 and HRB400M steel bars would be affected by direct current interference. The main corrosion products of HRB400 steel bars included γ-FeOOH and FeO when it was not interfered by DC. When DC interference was applied, the main corrosion products included FeO and FeO. The corrosion products on the surface of HRB400M steel bars were mainly FeO and FeO, and the types of products increased to form CrO and MnFeO.

摘要

采用失重试验、电化学试验、表面技术和产物分析等方法，研究了直流干扰对HRB400和HRB400M钢筋在模拟混凝土溶液中腐蚀行为的影响。研究结果表明，随着直流干扰电压的升高，HRB400和HRB400M钢筋的腐蚀速率均会增大。在试验条件下，HRB400M钢筋的耐蚀性优于HRB400钢筋。此外，直流干扰会对HRB400钢筋和HRB400M钢筋表面的腐蚀产物层造成破坏，且HRB400和HRB400M钢筋的腐蚀形态和腐蚀产物类型会受到直流干扰的影响。HRB400钢筋在未受直流干扰时，主要腐蚀产物为γ-FeOOH和FeO；施加直流干扰后，主要腐蚀产物为FeO和Fe₃O₄。HRB400M钢筋表面的腐蚀产物主要为FeO和Fe₃O₄，产物类型增多，还形成了Cr₂O₃和MnFe₂O₄。