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鈦合金及其油井管耐蝕性能研究進(jìn)展
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國(guó)家自然科學(xué)基金項(xiàng)目(51974245,21808182); 陜西省重點(diǎn)研發(fā)項(xiàng)目(2020GY234); 陜西省自然科學(xué)基礎(chǔ)研究計(jì)劃(2019JM472,2019JM506); 西安市科技計(jì)劃項(xiàng)目(2020KJRC0097,2020KJRC0098); 研究生創(chuàng)新與實(shí)踐能力培養(yǎng)計(jì)劃立項(xiàng)項(xiàng)目(YCS20113058)


Research Progress on Corrosion Resistance of Titanium Alloy and Its Oil Country Tubular Goods
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    摘要:

    綜述了油井管現(xiàn)狀、鈦合金組織與力學(xué)性能,重點(diǎn)探討了鈦合金作為油井管的耐蝕性能、影響因素與耐蝕機(jī)理,并對(duì)第一性原理計(jì)算在鈦合金管材成分設(shè)計(jì)與界面腐蝕特征中的應(yīng)用進(jìn)行了概述。研究發(fā)現(xiàn),鈦合金管材具有較強(qiáng)的抗硫化物應(yīng)力開(kāi)裂(SSC)性能,在高溫高壓(HTHP)油氣田的工況條件下具有極低的腐蝕速率,對(duì)孔蝕、縫隙腐蝕、接觸腐蝕以及氫脆等也具有高的抵抗力; Ti-6Al-4V(TC4)合金表面的鈍化膜在含H_2S腐蝕環(huán)境中更易遭到破壞,其穩(wěn)定性會(huì)因溫度變化與其他元素介入而發(fā)生變化,抗腐蝕性能也會(huì)隨之發(fā)生改變。

    Abstract:

    The present situation of oil country tubular goods( OCTG),titanium alloy microstructure and mechanical properties were reviewd,corrosion resisting property of titanium alloy as OCTG,influence factors and corrosion resistant mechanism were focused on,and the first-principles calculation in the composition design of the titanium alloy OCTG and the application of the interface corrosion characteristics were introduced. It is found that titanium alloy OCTG has strong resistance to sulfide stress cracking( SSC),the very low corrosion rate under the working conditions of high temperature and high pressure( HTHP) oil and gas field,and the strong resistance to pitting corrosion,crevice corrosion,contact corrosion and hydrogen embrittlement. The passivation film on Ti-6 Al-4 V( TC4) titanium alloy is more likely to be damaged in H_2S corrosion environment,the stability of titanium passivation film will change due to temperature change and other elements intervention,and then corrosion resistance will be different accordingly.

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董盼;朱世東;李金靈;劉強(qiáng);陳永楠;.鈦合金及其油井管耐蝕性能研究進(jìn)展[J].鈦工業(yè)進(jìn)展,2021,38(2):42-48.

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  • 在線發(fā)布日期: 2021-05-06
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