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    酸性油田管線管用無(wú)縫鋼管抗腐蝕性能分析

    Analysis on Anti-corrosion Property of Seamless Steel Linepipe for Acidic Oil Field

    • 摘要: 介紹對(duì)最小名義屈服強(qiáng)度為450 MPa（65 kpsi）的抗硫化氫應(yīng)力腐蝕管線管采用四點(diǎn)彎曲方法制備SSC試樣，進(jìn)行抗H2S應(yīng)力腐蝕評(píng)價(jià)，超聲波探傷、沖擊性能試驗(yàn)和金相分析的試驗(yàn)過(guò)程。評(píng)價(jià)試驗(yàn)結(jié)果顯示，該抗硫化氫腐蝕管線管SSC試樣通過(guò)超聲波探傷未發(fā)現(xiàn)裂紋及開(kāi)裂。評(píng)價(jià)試驗(yàn)試樣未有明顯的性能降低，內(nèi)部未有氫致裂紋，具有很好的抗氫滲入能力。試樣表面狀態(tài)局部的微腐蝕，為表面的均勻腐蝕，腐蝕產(chǎn)物為FeS。管線管組織均勻、晶粒度細(xì)小，能阻止氫的進(jìn)一步擴(kuò)展，對(duì)材料的抗硫化氫腐蝕性能有著重要的影響。

       

      Abstract: The testing procedures for the anti-SSC linepipe with a minimum nominal yield strength as 450 MPa(65 kpsi)are elaborated here in the paper, including preparing the SSC specimen with the 4-point bending method, performing SSC resistance evaluation, ultrasonic flaw detection, impact testing and metallographic analysis, etc.It is identified by the evaluation test results that no flaw or cracking is found with the said SSC specimen via the ultrasonic detection.And the specimen properties are not obviously reduced, and has no sign of HIC, having very good antihydrogen penetration property.The local micro-corrosion found on the specimen surface is regarded as homogeneous corrosion, and the corrosive product is FeS.The said linepipe has homogeneous structure composed of fine grains which is capable of stopping further hydrogen expansion, thus has significant effect on the SSC resistance of the material.

       

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