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中国腐蚀与防护学报  2009, Vol. 29 Issue (6): 453-458    
  研究报告 本期目录 | 过刊浏览 |
采用聚类分析研究X70钢在库尔勒土壤中初期电化学噪声特征
黄家怿;邱于兵;郭兴蓬
华中科技大学化学与化工院材料化学与服役失效湖北省重点实验室 武汉 430074
CLUSTER ANALYSIS OF ELECTROCHEMICAL NOISE FOR X70 STEEL IN KU'ERLE SOIL
HUANG Jiayi; QIU Yubing; GUO Xingpeng
State Key Laboratory of Materials Chemistry and Service Failure; Department of Chemistry and Chemical Engineering; Huazhong University of Science and Technology; Wuhan 430074
全文: PDF(1634 KB)  
摘要: 

采用电化学噪声(EN)技术研究了X70管线钢在库尔勒原土(含水量1.04%)中腐蚀初期(0 d~7 d)的腐蚀行为。通过时域谱分析、统计量分析和Q型聚类分析研究了电化学噪声特征以及相应的腐蚀状态信息,并与实际腐蚀状态和电化学阻抗谱(EIS)结果进行了对比。结果表明,基于EN统计量的谱系聚类分析法可用于解析土壤EN数据。聚类分析结果与时域分析、腐蚀形貌特征和EIS结果相吻合,且更加精确。根据聚类分析结果,可将研究体系中初期土壤局部腐蚀过程分为不稳定萌发期、快速发展期和稳定发展期三个阶段。

关键词 土壤腐蚀电化学噪声谱系聚类分析标准偏差电化学阻抗谱    
Abstract

The corrosion behaviors of X70 steels in Xinjiang Ku'erle saline soil (moisture content 1.04%) during the initial corrosion period (0~7 days) were studied by electrochemical noise (EN). The characteristics of the EN time records and their related corrosion information were identified by analysis of the EN fluctuations, statistical parameters including standard deviation of potential and current (σE, σ I) and noise resistance (Rn), as well as Q-type clustering, which was further proved by corrosion morphology and electrochemical impedance spectroscopy (EIS) results. The results show that cluster analysis could be used to treat the EN signals to identify different corrosion states. Based on the hierarchical agglomerative cluster using σE and σ  I as variables, three different states for the local  corrosion in the studied system could be classified clearly, including instable germination state, quick development state and stable development state.

Key wordssoil corrosion    electrochemical noise    cluster analysis    standard deviation    EIS
收稿日期: 2008-03-20     
ZTFLH: 

TG174

 
基金资助:

国家高技术研究发展计划项目(2007AA06Z206)及国家材料自然环境腐蚀实验台网建设(2005DKA10400-Z5)资助

通讯作者: 郭兴蓬,     E-mail: guoxp@mail.hust.edu.c
作者简介: 黄家怿,1980年生,女,博士生,研究方向为材料防护方面的电化学噪声监测与数据分析方法

引用本文:

黄家怿 邱于兵 郭兴蓬. 采用聚类分析研究X70钢在库尔勒土壤中初期电化学噪声特征[J]. 中国腐蚀与防护学报, 2009, 29(6): 453-458.
HUANG Jia-Yi, QIU Xu-Bing, GUO Xin-Peng. CLUSTER ANALYSIS OF ELECTROCHEMICAL NOISE FOR X70 STEEL IN KU'ERLE SOIL. J Chin Soc Corr Pro, 2009, 29(6): 453-458.

链接本文:

https://www.jcscp.org/CN/      或      https://www.jcscp.org/CN/Y2009/V29/I6/453

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