發(fā)布時間：2018-10-13 11:18

【摘要】：目的研究老舊高壓輸電耐張線夾內(nèi)部交流腐蝕。方法截取已運(yùn)行35 a的耐張線夾并解剖,采用掃描電子顯微鏡分析腐蝕區(qū)的微觀形貌,采用X射線衍射儀、能譜儀和X射線光電子能譜儀對腐蝕區(qū)元素及物相進(jìn)行分析鑒定,分析線夾內(nèi)部腐蝕損傷演化過程。結(jié)果線夾內(nèi)表面與鋁線表面局部出現(xiàn)大量白色腐蝕產(chǎn)物和黑色覆蓋物,白色腐蝕物呈粉末和片層兩種形態(tài)。分析表明,腐蝕產(chǎn)物相組成為Al2O3,Al O(OH)和Al OOH;黑色覆蓋物隨深度增加而減少,黑色區(qū)域主要元素為Al,O和C,物相組成為Al2O3,C(graphite)和含C有機(jī)物。鋼芯鋅層破壞區(qū)的內(nèi)層鋁線更易腐蝕,腐蝕區(qū)呈灰黑色,微觀形貌為富鐵元素顆粒鑲嵌在其它腐蝕產(chǎn)物中,區(qū)域的主要元素為Al,C,O,Fe和Zn,Fe元素存在形式為Fe2O3;鋼芯表面鍍鋅層局部腐蝕嚴(yán)重,呈現(xiàn)平面型點蝕形貌,主要元素為Zn,Al,C和O,Zn腐蝕產(chǎn)物為六邊纖鋅礦結(jié)構(gòu)Zn O。結(jié)論內(nèi)部交流腐蝕原因為液體滲入,同時腐蝕產(chǎn)生大量的熱致使材料分解。
[Abstract]:Aim to study the internal AC corrosion resistance of tension clamp in old high voltage transmission line. Methods the tensile clamp which had been running for 35 years was intercepted and dissected. The microstructure of the corrosion zone was analyzed by scanning electron microscope (SEM). The elements and phases of the corrosion zone were analyzed and identified by X-ray diffractometer, energy spectrometer and X-ray photoelectron spectrometer. The evolution process of corrosion damage inside the clamp is analyzed. Results A large number of white corrosion products and black coverings were found on the inner surface of the wire clip and the surface of the aluminum wire, and the white corrosion materials were in the form of powder and lamellar. The results show that the phase composition of the corrosion products is Al2O3,Al O (OH) and Al OOH; black coverings decrease with the increase of depth, the main elements in the black area are Al,O and C, and the phase compositions are Al2O3,C (graphite) and C-containing organic compounds. The inner layer aluminum wire in the damage zone of steel core zinc layer is more susceptible to corrosion, and the corrosion zone is gray-black, and the microcosmic appearance is iron rich element particles embedded in other corrosion products. The main elements in the region are Al,C,O,Fe and Zn,Fe in the form of severe local corrosion of galvanized layer on the surface of Fe2O3; steel core, and the main elements are Zn,Al,C and the corrosion product of Zn,Al,C is Zn O with hexagonal wurtzite structure. Conclusion the internal AC corrosion is caused by the infiltration of liquid and the decomposition of materials caused by large amount of heat caused by corrosion.
【作者單位】： 合肥工業(yè)大學(xué)材料科學(xué)與工程學(xué)院;國網(wǎng)安徽省電力公司電力科學(xué)研究院;
【分類號】：TM75;TG172

【相似文獻(xiàn)】

相關(guān)期刊論文 前3條

1 王偉;朱成麗;吳洪亮;李曉紅;;耐張線夾內(nèi)鋼芯鋁絞線斷裂原因及斷口特征[J];腐蝕與防護(hù);2014年03期

2 夏元岳;王麗萍;;耐張線夾采用變質(zhì)鑄鋁102合金的工藝試驗[J];電力機(jī)械;1982年01期

3 ;[J];;年期

相關(guān)會議論文 前4條

1 蔣克斌;;論電力拉線金具強(qiáng)度修正的必要性[A];2013年中國電機(jī)工程學(xué)會年會論文集[C];2013年

2 趙永寧;杜寶帥;張都清;菅明建;;220千伏線路耐張線夾導(dǎo)線鋼芯斷線分析研究[A];第四屆全國架空輸電線路技術(shù)交流研討會論文集[C];2013年

3 陳國宏;王中亞;王勇;王家慶;;某110kV輸電線路導(dǎo)線損傷狀態(tài)分析[A];第十九屆輸配電研討會論文集[C];2011年

4 付東江;梁之林;于全福;;220kV熱東乙線避雷線進(jìn)線門型構(gòu)耐張線夾過熱原因分析[A];高效 清潔 安全 電力發(fā)展與和諧社會建設(shè)——吉林省電機(jī)工程學(xué)會2008年學(xué)術(shù)年會論文集[C];2008年

相關(guān)重要報紙文章 前1條

1 董立天;“永不消失”的電暈[N];中國電力報;2005年

相關(guān)碩士學(xué)位論文 前1條

1 李雪;耐熱導(dǎo)線耐張線夾發(fā)熱問題解決方案研究[D];華北電力大學(xué);2010年

，

本文編號：2268421