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1)  corrosion crack
腐蚀开裂
1.
The corrosion crack of angle steel sheet of the high voltage transmission tower's framework in the 220kV Chuxi Circuitry was researched.
本文对220kV滁西线高压输电线路铁塔主架角钢腐蚀开裂部位取样,用钻取末方法研究了主架角钢的成份,用金相(明场、暗场、偏光)分析方法,研究了主架角钢的组织结构,用电子探针及X射线衍射,研究了铁塔材料夹杂物性质及腐蚀产物特性,用金相显微镜及扫描电镜研究了镀锌层及镀锌层与基体结合面受力后的状态,用万能材料试验机研究了主架角钢的力学性能。
2.
The angle steel corrosion crack of the 220 kV ChuXi line high voltage transmission tower\'s main framework was researched by chemistry component,metallographic structure,tensile testing,electrochemistry corrosion property and zinc-coating electron microscope and so on.
文中针对滁西220 kV高压输电线路铁塔主架角钢腐蚀开裂问题进行的化学成分、金相组织、拉伸试验、电化学腐蚀特性和镀锌层电镜等分析研究情况,指出滁西线铁塔腐蚀开裂为均匀腐蚀加缝隙腐蚀的结果,与铁塔受力、铁塔基体缺陷和大气腐蚀密切相关。
2)  corrosion cracking
腐蚀开裂
3)  stress corrosion crack
应力腐蚀开裂
1.
On behavior of sulfide-stress corrosion cracking (SSCC) of X80 pipeline in H_2S environment;
X80焊管H_2S环境应力腐蚀开裂行为研究
2.
The stress corrosion crack causes of high sulfur pipes serviced hydrodesulfurization system of a refinery were analyzed.
表明管道的开裂是由富含H_2S环境介质再加上焊缝附近较高的焊接残余应力引起的应力腐蚀开裂
3.
The susceptibility to stress corrosion cracking (SCC) of the welded joint of X80 pipeline steel in solution of 0.
5mol/LNa2CO3+1mol/LNaHCO3溶液中的应力腐蚀开裂(SCC)敏感性。
4)  stress corrosion cracking(SCC)
应力腐蚀开裂
1.
From the samples,by means of chemical composition analysis,mechanical property examination,appearance inspection,metallographic examination,SEM and EDS,we discovered that the stress corrosion cracking(scc) appeared as a result of the spot corrosion in the inside wall of the pipeline.
通过取样进行化学成分分析、机械性能测试、外观检验、金相检验、扫描电镜和X射线能谱分析发现,由于管道内壁发生点蚀损伤,进而发生应力腐蚀开裂
2.
The stress corrosion cracking(SCC)behavior of X70 steel welded joint was investigated in a near-neutral pH solution by fluctuant slow strain rate test(F-SSRT).
研究了波动频率对X70管线钢焊接接头在阴极电位下的近中性介质中慢应变速率应力腐蚀开裂(SCC)行为。
3.
The results showed that: low stress ratio increased the fluctuation of load,which facilitated the crack initiation of stress corrosion cracking(SCC) of pipeline steel;in terms of the same cycles of the fluctuating load on sam.
研究了应力比、加载频率和外加横向载荷等力学因素对X70管线钢在新疆土壤溶液中穿晶应力腐蚀开裂裂纹萌生的影响,并结合环境扫描电镜对腐蚀样品表面进行观察。
5)  stress corrosion cracking
应力腐蚀开裂
1.
Research on tests about stress corrosion cracking of spheres and safety performance analysis;
球罐应力腐蚀开裂研究与安全性分析
2.
Welding methods for improving stress corrosion cracking of girth-butt welded pipes;
提高对接环焊管道抗应力腐蚀开裂性能
3.
Study on Electrochemical Noise for Stress Corrosion Cracking of C Ring Specimen;
C型环试样应力腐蚀开裂的电化学噪声研究
6)  intergranular corrosion cracking
晶间腐蚀开裂
1.
The results showed that above cracks are intergranular corrosion cracking basically in weak oxidative medium;they are caused by following factors mainly: contain some acetic acid and little formic acid in active medium,IGCC-resistance of shell material is insufficient,improper welding technology lead to local HAZ in the sensitized temperature range(450~850 ℃)for longer time.
结果表明,裂纹基本属于弱氧化性介质条件下的晶间腐蚀开裂;介质中含有一定量的乙酸(CH3COOH)和少量甲酸(HCOOH),塔体材料抗晶间腐蚀性能不足,不适当的焊接工艺导致部分热影响区较长时间处于敏化温度(450~850℃)范围是引发塔体开裂的主要因素。
补充资料:应力腐蚀开裂
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性质:又称应力腐蚀开裂或应力腐蚀(stress corrosion)。材料在静拉伸应力和腐蚀介质共同作用下发生的脆性破裂。大多数合金材料以及一些工程塑料都会发生这种腐蚀破裂。但对于特定材料,破裂通常发生在特定介质中,例如奥氏体不锈钢在氯离子介质中,高强钢在海水中,黄铜在氨溶液中。应力腐蚀裂纹形成后不断扩展,很难监测或控制,最终可导致材料断裂,是工程实践中危害性最大的一种腐蚀类型。可以通过控制介质的化学组成、减小外加应力或在材料表层形成压应力、涂刷表面保护层、缓蚀剂及阴极保护等方法予以防止或减缓。

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