摘要
在自制的微动磨损试验装置上研究了LGJI50/25型钢芯铝绞线(aluminium conductor steel reinforced,ACSR)在工业大气腐蚀环境、不同振幅条件下的微动腐蚀行为。结果表明:铝股线微动腐蚀斑基本保持了干态微动磨损斑的特征,但磨损面分布有腐蚀产物层,在磨损斑的边缘有腐蚀孔洞;微动腐蚀铝股线的抗拉强度更低,而电阻率更高,导线的损伤程度更大,且随微动振幅增加而增大国;微动腐蚀铝股线的断裂开始于磨损斑下的疲劳裂纹,磨损面下的Ⅰ型与Ⅱ型裂纹借助于电化学反应,促进了铝股线的微动腐蚀,形成腐蚀孔洞,成为ACSR导线在大气腐蚀条件下微动损伤的主要原因。
The fretting corrosion behavior of the LGJ150/25 aluminium conductor steel reinforced（ACSR）conductor is investigated under industrial atmosphere corrosion condition and two different fretting amplitudes,based on the fretting abrasion/ fatigue testing equipment developed by the others.It is shown that the morphologies of the abrasion marks after fretting corrosion are basically similar to those after dry fretting wear, but there are corrosion products on the abrasion surfaces and corrosion holes along the edge of the abrasion marks.After fretting corrosion,the tensile strength of the Al strands decreases and the resistivity increases,so that damage of the conductor is more serious and becomes worse by increasing the fretting amplitude.Fracture of Al strands after fretting corrosion originates from theⅠandⅡ-type fatigue cracks under the abrasion marks,which accelerates fretting corrosion via an electrochemical reaction and forms the corrosion holes.It possibly acts as the key factor of the fretting damage of ACSR conductor under atmospheric corrosion condition.
出处
《电力建设》
2011年第5期21-25,共5页
Electric Power Construction
基金
国家电网公司科技项目(2009144)
关键词
钢芯铝绞线
微动腐蚀
大气腐蚀
磨损斑
材料特性
ACSR
fretting corrosion
atmospheric corrosion
abrasion mark
materials characteristics
