Analyzing Water Tree Growth Characteristics in XLPE Cable Under Different Acid-base Environments From the Perspective of Ionic Nature

ZHANG Chunshuo; ZHOU Kai; LI Tianhua; WAN Hang; GONG Jun; CHEN Zelong

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Analyzing Water Tree Growth Characteristics in XLPE Cable Under Different Acid-base Environments From the Perspective of Ionic Nature

更新时间：2025-12-08

- Analyzing Water Tree Growth Characteristics in XLPE Cable Under Different Acid-base Environments From the Perspective of Ionic Nature
- Vol. 46, Issue 1, Pages: 233-239(2020)
- 作者机构：
  
  1. 四川大学电气工程学院
  2. 国网临沂供电公司
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published Online：31 January 2020，
  
  Published：2020
- 稿件说明：
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ZHANG Chunshuo, ZHOU Kai, LI Tianhua, et al. Analyzing Water Tree Growth Characteristics in XLPE Cable Under Different Acid-base Environments From the Perspective of Ionic Nature[J]. 2020, 46(1): 233-239.
DOI：

ZHANG Chunshuo, ZHOU Kai, LI Tianhua, et al. Analyzing Water Tree Growth Characteristics in XLPE Cable Under Different Acid-base Environments From the Perspective of Ionic Nature[J]. 2020, 46(1): 233-239. DOI：

摘要

为了研究不同酸碱环境对XLPE电缆水树生长的影响

将XLPE电缆置于不同pH（pH=1、p H=5、pH=7、pH=9、pH=13）环境下进行水树老化实验。老化结束后

利用光学显微镜观察对比不同pH值老化环境下水树微观形态

并分别统计水树长度。实验结果表明:酸性环境和碱性环境均有利于水树的生长。就水树枝平均长度(L

)而言

（pH=1）>L

（pH=13）>L

（pH=5）>L

（pH=9）>L

（pH=7）;中性环境（pH=7）下水树区染色深

分枝状明显;酸性环境（pH=1、pH=5）和碱性环境（pH=9、p H=13）下

水树区染色较浅

分枝状不明显。从离子本性角度对以上实验结果提出一种可能的解释:离子对水树老化过程起着重要作用

水溶液中的H

和OH

具有特殊的迁移方式

其离子淌度比一般离子要大很多

对材料化学键和分子链的破坏作用更强

引起的水树老化现象更严重;Na

和Cl

的离子半径更大

XLPE分子链断裂后形成的裂纹和孔洞更大

导致水树区域染色更深。

Abstract

To study the influences of acidic environment or alkaline environment on the growth of water trees in XLPE cables

XLPE cables were placed under different p H environments to carry out water tree aging experiments. After the aging of water trees

the microscopic morphology of water trees under different aging conditions was observed and compared by using an optical microscope

and lengths of water trees were counted. The results show that acidic environment and alkaline environment are beneficial to the growth of water trees. The average lengths of water trees are in th

e following order: L

（pH=1）>L

（p H=13）>L

（pH=5）>L

（pH=9）>L

（pH=7）. The water trees which grow in the neutral environment（pH=7） are deeply dyed and the branches are obvious. In acidic environments（pH=1

pH=5） and alkaline environments（pH=9

pH=13）

the water trees areas are lighter and the branches are indistinct. A possible explanation is given for the above experimental results from the viewpoint of ionic nature. Ions play an important role in the growth of water trees. Hydrogen ions and hydroxide ions in aqueous solutions have special migration patterns. Their ion mobility is much larger than that of general ions. They are more destructive to material chemical bonds and molecular chains

and they cause more serious aging of the water trees. The ionic radii of sodium ion and chloride ion are larger

and the cracks and holes formed after the fracture of the XLPE molecular chain are larger

resulting in deeper staining in the water tree region.

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