腐蚀性硫浓度对“晶界工程”优化铜绕组抗油硫腐蚀性能的影响

doi:10.11903/1002.6495.2017.114

腐蚀科学与防护技术

2018, Vol. 30

Issue (2): 127-134 DOI: 10.11903/1002.6495.2017.114

研究报告

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腐蚀性硫浓度对“晶界工程”优化铜绕组抗油硫腐蚀性能的影响

许云洁¹, 袁媛¹(

), 周江¹, 何潇², 廖瑞金³

1 重庆大学材料科学与工程学院重庆 400044
2 云南电网有限责任公司电力科学研究院昆明 650200
3 重庆大学输配电装备及系统安全与新技术国家重点实验室重庆 400044

Concentration Dependence of Corrosive Sulfur Induced Corrosion of GBE Copper-windings

Yunjie XU¹, Yuan YUAN¹(

), Jiang ZHOU¹, Xiao HE², Ruijin LIAO³

1 College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
2 Electric Power Research Institute, Yunnan Power Grid Co., LTD, Kunming 650200, China
3 State Key Laboratory of Transmission & Distribution Equipment and Power System Safety and New Technology, Chongqing University, Chongqing 400044, China;

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摘要:

为了缓解油浸式电力设备中广泛存在的油硫腐蚀问题,本文采用“晶界工程 (GBE)”技术优化铜绕组,对其进行了不同腐蚀性硫浓度的腐蚀实验,通过对铜绕组和绝缘油中腐蚀产物的生成,以及微观分析,研究了“GBE”铜绕组的抗腐蚀性能,以及其对绝缘油特性的影响。结果表明：由于“GBE”铜绕组特殊晶界比例的增加抑制了腐蚀坑的产生和合并,其具有优良的抗油硫腐蚀性能,即使在腐蚀性硫浓度达到2000 mg/kg时仍不会发生腐蚀,且其对绝缘油电气和理化性能影响较小。

关键词 ：硫腐蚀, 铜绕组, 晶界工程, 绝缘油, 腐蚀性硫浓度

Abstract：

To reveal the nature of the so called oil-containing sulfur induced corrosion, existed in oil-immersed power transformers, corrosion test for copper-windings prepared via grain boundary engineering was performed in insulating oils with different concentration of corrosive sulfur at 150 ℃. The corrosion resistance of GBE copper-windings and the effect corrosion on properties of the insulating oil are studied through characterizing the formed corrosion scale on Cu surface and the dissolved substances in the insulating oil. The results indicate that GBE copper-windings present excellent corrosion resistance even in the oil with corrosive sulfur up to 2000 mg/kg, while which hardly influence the physical- and chemical-property of the insulating oil.

Key words： sulfur corrosion copper windings grain boundary engineering insulating oil corrosive sulfur concentration

收稿日期: 2017-05-11

基金资助:国家自然科学基金 (51407018,51677015) 和国家级大学生创新训练项目 (201610611045)

作者简介:

作者简介许云洁,女,1996年生

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引用本文:

许云洁, 袁媛, 周江, 何潇, 廖瑞金. 腐蚀性硫浓度对“晶界工程”优化铜绕组抗油硫腐蚀性能的影响[J]. 腐蚀科学与防护技术, 2018, 30(2): 127-134.
Yunjie XU, Yuan YUAN, Jiang ZHOU, Xiao HE, Ruijin LIAO. Concentration Dependence of Corrosive Sulfur Induced Corrosion of GBE Copper-windings. Corrosion Science and Protetion Technology, 2018, 30(2): 127-134.

链接本文:

https://www.cspt.org.cn/CN/10.11903/1002.6495.2017.114 或 https://www.cspt.org.cn/CN/Y2018/V30/I2/127

表1 油硫腐蚀实验样品编号

图1 铜样品腐蚀情况

图2 Cu系列样品表面的SEM像

表2 Cu系列样品表面元素组成分析

图3 GBE Cu系列样品表面的SEM像

表3 “GBE”Cu系列样品表面元素组成分析

图4 不同腐蚀性硫浓度下的铜样品腐蚀后绝缘油的Cu含量

图5 铜腐蚀的SEM像

图6 EBSD标定的铜样品晶界分布

图7 不同腐蚀性硫浓度下的铜样品腐蚀后绝缘油的介质损耗

图8 不同腐蚀性硫浓度下的铜样品腐蚀后绝缘油的直流电阻率

图9 不同腐蚀性硫浓度下的铜样品腐蚀后绝缘油的击穿电压

图10 不同腐蚀性硫浓度下的铜样品腐蚀后绝缘油的粘度

图11 不同腐蚀性硫浓度下的铜样品腐蚀后绝缘油的酸值

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