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首页> 外文会议>5th International Conference on High Nitrogen Steels, 5th, May 27-28, 1998, Stockholm, Sweden >Corrosion Behaviour of Solution Nitrided Stainless Steels
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Corrosion Behaviour of Solution Nitrided Stainless Steels

机译：固溶渗氮不锈钢的腐蚀行为

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摘要

The case of near net shape parts made from austenitic steel X2CrNiMol7-13-2 and austenitic-ferritic steels X2CrNiMoN22-5-3 (wrought) and G-X3CrNiMoCuN26-6-3-3 (cast) is interstitially enriched with nitrogen by the diffusion-based process "solution nitriding". In order to obtain good corrosion resistance and mechanical properties, the solution nitriding parameters and the applied cooling time are selected so, that precipitates are avoided (X2CrNiMol7-13-2, X2CrNiMoN22-5-3). However, in case of a superimposed hydroabrasive load, the presence of nitrides in the case is found to be beneficial. The solution nitrided and the solution annealed conditions of the steels are compared with respect to their susceptibility to corrosion by means of electrochemical polarisation curves. The erosion corrosion behaviour of the materials is analysed in pilot scale flow-loop tests using particle loaded corrosive and particle loaded non-corrosive media. It is shown that "solution nitriding" leads to improved corrosion behaviour and/or improved erosion corrosion resistance, in particular in the case of the duplex steels.
机译：由奥氏体钢X2CrNiMol7-13-2和奥氏体铁素体钢X2CrNiMoN22-5-3（锻造）和G-X3CrNiMoCuN26-6-3-3（铸造）制成的近净形零件的情况是通过扩散在间隙中富集了氮基于过程的“溶液氮化”。为了获得良好的耐腐蚀性和机械性能，应选择溶液渗氮参数和所应用的冷却时间，从而避免沉淀（X2CrNiMol7-13-2，X2CrNiMoN22-5-3）。但是，在叠加的水力研磨负载的情况下，发现在这种情况下存在氮化物是有利的。通过电化学极化曲线比较了钢的固溶态和退火态的腐蚀敏感性。在中试规模的流动环测试中，使用颗粒负载的腐蚀介质和颗粒负载的非腐蚀介质分析了材料的腐蚀腐蚀行为。结果表明，“固溶氮化”导致改善的腐蚀行为和/或改善的抗腐蚀腐蚀性能，特别是在双相钢的情况下。

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