期刊论文

中文

材料保护

1001-1560

2013

46

9

57-60

10.16577/j.cnki.42-1215/tb.2013.09.020

国家电网江西省电力公司科技项目（201250606） 湖南省自然科学基金项目（09JJ6067）资助

本校为第一机构

为了揭示接地网材20钢在砂质土壤中的腐蚀行为与Cl~-的关系,以宁夏地区砂质土壤为腐蚀介质,利用土壤埋片试验、电化学试验研究了20钢在不同Cl~-浓度砂质土壤中的腐蚀形为;用扫描电镜、X射线衍射仪对腐蚀产物形态和成分进行了表征分析。结果表明:砂质土壤中Cl~-含量对20钢的腐蚀过程有较大的影响,腐蚀速率随着Cl~-浓度的升高而先增后减,当Cl~-浓度为1.5%时,腐蚀速率达到最大值;Cl~-在腐蚀过程中起催化作用,促进金属的溶解,Cl~-浓度为1.5%时,20钢表面腐蚀产物主要有Fe_2O_3和FeOOH,形成近阵列的结构,良好地覆盖在基体上,对腐蚀起到了一定的阻碍作用。

The sandy soil containing different concentration of Clin Ningxia area was used as the corrosive medium to investigate the corrosion behavior of grounding grid 20 steel( 20G steel) via soil-bearing test and electrochemical test. The appearance and composition of the corroded products were analyzed by means of scanning electron microscopy and X-ray diffraction,and the relationship between the corrosion behavior of the steel and Cl-content in the sandy soil was explored. It was found that the content of Cl-in the sandy soil had significant effect on the corrosion of the steel. Namely,the corrosi...