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首页> 外文期刊>Corrosion Engineering, Science and Technology >Sulphide stress corrosion cracking of multiple welding repairs of girth welds in line pipe
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Sulphide stress corrosion cracking of multiple welding repairs of girth welds in line pipe

机译：管线管道环焊缝多次修复中的硫化物应力腐蚀开裂

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摘要

The susceptibility to sulphide stress corrosion cracking (SSCC) of four conditions of shielded metal arc welding repairs and one as welded specimen of the girth weld in seamless API X-52 microalloyed steel pipe were evaluated using slow strain rate tests. The slow strain rate tests were performed in air and in a NACE solution saturated with H2S both at room temperature to a constant elongation rate of 25·4 × 10-6 mm s-1. The SSCC susceptibility was evaluated in function of the reduction in area ratio and elongation ratio and also was manifested as a decrease in the mechanical properties. According to this consideration it is clear that all the weldments exhibit a great susceptibility to SSCC. After failure, the fracture surfaces were observed in the scanning electron microscope. The metallographic observations of the fractured specimens showed that the most susceptible area to SSCC was the intercritical heat affected zone.
机译：使用慢应变率测试，评估了四种条件下的屏蔽金属电弧焊修复和一种作为无缝API X-52微合金钢管的环缝焊缝焊接标样的硫化物应力腐蚀开裂（SSCC）敏感性。慢应变速率测试是在空气中以及在室温下均以H 2 S饱和的NACE溶液中进行的，恒定伸长率为25·4×10 -6 毫米s -1 。根据面积比和伸长率的降低来评价SSCC的敏感性，并且还表现为机械性能的降低。根据这一考虑，很明显，所有焊件都对SSCC表现出极大的敏感性。破坏后，在扫描电子显微镜中观察断裂表面。断裂试样的金相观察表明，对SSCC最敏感的区域是临界热影响区。

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  • 来源
    《Corrosion Engineering, Science and Technology》 |2009年第4期|289-296|共8页
  • 作者

    Vega O.E.; Villagómez A.; Hallen J.M.; Contreras A.;

  • 作者单位

    Departamento de Ingeniería Metalúrgica, ESIQIE-IPN, Laboratorios Pesados de Metalurgia, UPALM, Zacatenco, C.P. 07738, México;

    Construcciones Marítimas Mexicanas, CMM-PROTEXA, Av. Periférica s, Fracc. Lomas de Holche, Cd. del Carmen, Campeche, México;

    Departamento de Ingeniería Metalúrgica, ESIQIE-IPN, Laboratorios Pesados de Metalurgia, UPALM, Zacatenco, C.P. 07738, México;

    Instituto Mexicano del Petróleo, Eje Central Lázaro Cárdenas Norte no. 152 Col. San Bartolo Atepehuacan, C.P. 07730, México, Email: acontrer@imp.mx;

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