摘要
针对接地网材料Q235、Q235镀锌扁钢在红壤中的腐蚀情况,通过运用失重法、微观分析法和电化学方法,采用扫描电镜(SEM)、能谱(EDS)和X射线衍射(XRD)等技术对接地网材料进行腐蚀产物分析。结果表明:Q235的腐蚀类型为局部腐蚀,产物主要为Fe3O4,Q235镀锌扁钢的腐蚀类型为全面腐蚀,腐蚀产物主要由Fe3O4、ZnO等组成。Tafe测试结果表明Q235和镀锌Q235在红壤中的腐蚀电流随着氯离子和硫酸根离子浓度的增加出现先增加后减小的趋势。通过失重试验发现Q235和镀锌Q235在土壤中的腐蚀速率先增加后减小,最后趋于稳定;通过失重法可以得到接地网在某个时间段的腐蚀速率,进而可以预测接地网的平均腐蚀速率,这对于避免因接地故障而导致的重大安全事故和节约接地网维修成本等方面具有较强的参考价值。
For grounding grid material Q235, Q235 galvanized flat steel corrosion in the red soil, through the use of weight loss method, microscopic analysis and electrochemical methods, using scanning electron microscopy（SEM）, spectroscopy（EDS） and X-ray diffraction（XRD） and other technical materials for grounding grid corrosion product analysis. The results showed that： Q235 type of localized corrosion product is mainly Fe3O4, types of corrosion of galvanized flat steel for Q235 general corrosion, corrosion product is mainly composed of Fe3O4, Zn O and other components. Tafel test results show galvanized Q235 and Q235 in the red soil of the corrosion current with increasing chloride and sulfate ion concentration increases after the first decrease trend. It was found by weightlessness Q235 and Q235 in the soil galvanized corrosion rate first increased and then decreased, and finally stabilized; grounding grid corrosion rate can be obtained in a certain period of time by the weight loss method, in turn, can predict the average corrosion grounding grid rate, which has a strong reference value to avoid major accidents caused due to a ground fault grounding grid and saving maintenance costs and so on.
出处
《广东化工》
CAS
2015年第4期12-14,23,共4页
Guangdong Chemical Industry
基金
湖南省科技厅科技计划重点专项:2013GK2006
湖南省重大专项:2012FJ1003
关键词
接地网
土壤腐蚀
腐蚀机理
腐蚀速率
ground grid
soil erosion
corrosion mechanism
corrosion rate
