Research of Acid Soil Corrosion Resistant New Steels for Grounding Grid

Q4 Chemical Engineering

腐蚀科学与防护技术 Pub Date : 2015-04-17 DOI:10.11903/1002.6495.2014.146

Jian Li, H. Su, A. Yan, F. Chai, Xiao-ping Chen, Hui-min Meng, Xiang-yang Li

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引用次数: 1

Abstract

The corrosion behavior of a commercial carbon steel Q235, and two new steels A1 and A2 in an artificial soil, which consisted of diatomite and appropriate acid solution to simulate a typical acidic soil at Southern China was studied by mean of corrosion weight loss measurement, and then the corrosion morphology and products were characterized by SEM and XRD. The results showed that the corrosion rate of Q235, A1 and A2 steel in the simulated acidic soil was 0.48, 0.14 and 0.097 mm/a respectively after 300 h corrosion; the tendency to micro-cell corrosion of a steel can be lowered as the carbon content of the steel has been reduced; an appropriate addition of Cr can shift positively the corrosion potential of the matrix; the enrichment of Cr in the inner portion of the rust scale can improve its compactness, and change the propagation mode of corrosion pits;the corrosion products of Q235, A1 and A2 steel were mainly consisted of α- Fe OOH, γ- Fe OOH and Fe3O4, however, the corrosion products of A1 and A2 steels possess a ratio of α-Fe OOH to γ-Fe OOH ca 10 times higher than that of Q235 steel, which implying a better protectiveness of the rust layers for the two new steels.

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耐酸性土壤腐蚀接地网新型钢的研究

采用腐蚀失重法研究了商品碳钢Q235和两种新型钢A1和A2在硅藻土和适当酸溶液组成的模拟华南典型酸性土壤中的腐蚀行为，并用SEM和XRD对腐蚀形貌和产物进行了表征。结果表明:Q235、A1和A2钢在模拟酸性土壤中腐蚀300 h后的腐蚀速率分别为0.48、0.14和0.097 mm/a;随着钢中碳含量的降低，钢的微孔腐蚀倾向降低;适当添加Cr可使基体的腐蚀电位正向移动;Cr的浓缩的内在部分生锈比例可以提高其密实度,并改变腐蚀坑的传播模式;Q235的腐蚀产物,A1和A2钢主要是由α- Fe哦,γ- Fe哦和Fe3O4,然而,A1和A2钢的腐蚀产物拥有比α铁哦,γ铁哦ca Q235钢的10倍,这意味着更好的保护两个新的钢锈层。

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来源期刊

腐蚀科学与防护技术 Chemical Engineering-Chemical Engineering (all)

CiteScore

0.60

自引率

0.00%

发文量

2399

期刊介绍： Corrosion Science and Protection Technology is approved by the General Administration of Press and Publication of the State Council, the Chinese Academy of Sciences, the Chinese Academy of Sciences Institute of Metals organized by the domestic and international public circulation of national periodicals metal surface treatment academic journals. The journal is a professional and technical publication. It reports the scientific and technological achievements in the field of metal corrosion and protection, and publishes research reports, reviews, technical reports, research briefs, failure analysis, experience exchange, etc. The readers are engaged in the field of metal corrosion and protection. The target readers are scientific and technological personnel engaged in metal corrosion and protection and teachers and students of related professional colleges and universities. Corrosion Science and Protection Technology is indexed in CSCD, CSTPCD, CA,MA,SA and other authoritative databases.