采用动电位极化曲线、显微形貌观察的方法研究了两种热处理工艺对2205不锈钢在高Cl-环境中的腐蚀行为。通过金相组织分析观察热处理后样品的组织形貌,在此基础上建立了显微组织与腐蚀行为之间的相关性。结果表明,950℃热处理＋炉冷处理导致2205双相不锈钢中σ相大量析出,造成σ相周围铬和钼含量的减少,从而使双相不锈钢的耐腐蚀性能显著降低。
The effect of two kinds of heat treatment on the corrosion behavior of 2205 dup＇ex stainless steel was investigated by means of polarization curves, immersion testing and morphology observation. The experiment results indicated that the heat treatment at 950 ℃ for 30 min followed by furnace cooling decreased the corrosion resistance of 2205 duplex stainless steel significantly, which was attributed to the formation of Cr23 C6 and o phase.
参考文献
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| [2] | J.Dobranszky;P.J.Szabo;T.Berecz;V.Hrotko;M.Portko .Energy-dispersive spectroscopy and electron backscatter diffraction analysis of isothermally aged SAF 2507 type superduplex stainless steel[J].Spectrochimica Acta, Part B. Atomic Spectroscopy,2004(10/11):1781-1788. |
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