This work focuses on the high temperature oxidation of AISI 316L produced by Selective Laser Melting (SLM) and by conventional metallurgy (wrought), used as reference. Oxidation tests were performed at 900 °C for up to 3000 h in laboratory air and up to 1000 h in wet air (air-10 vol.% H₂O). X-ray diffraction, scanning electron microscopy and energy-dispersive X-ray spectrometry were used for the characterization of the corrosion products. SLM specimens exhibit a better oxidation resistance in both atmospheres. SLM samples exhibit parabolic behavior \((k_{p} = 1.7~.10^{{ - 13}} g^{2} .cm^{{ - 4}} .s^{{ - 1}} )\) throughout 3000 h in air while wrought \((k_{p} = 1.4~.10^{{ - 13}} g^{2} .cm^{{ - 4}} .s^{{ - 1}} )\) samples undergo breakaway oxidation after 1000 h of exposure. These observations are emphasized in wet air, since wrought coupons present catastrophic oxidation after 100 h, while parabolic behavior \((k_{p} = 7.0~.10^{{ - 14}} g^{2} .cm^{{ - 4}} .s^{{ - 1}} )\) is observed all along the 1000 h exposure for SLM samples. The better behavior observed for SLM samples can be explained by the growth of a dense and continuous Cr₂O₃ protective layer.

这项工作的重点是通过选择性激光熔化 (SLM) 和常规冶金（锻造）生产的 AISI 316L 的高温氧化，用作参考。氧化测试在 900 °C 下在实验室空气中进行长达 3000 小时，在湿空气（空气 - 10 vol.% H ₂ O）中进行长达 1000 小时。X 射线衍射、扫描电子显微镜和能量色散 X 射线光谱法用于表征腐蚀产物。SLM 样品在两种气氛中都表现出更好的抗氧化性。SLM 样本表现出抛物线行为\((k_{p} = 1.7~.10^{{ - 13}} g^{2} .cm^{{ - 4}} .s^{{ - 1}} )\)整个 3000 小时在空气中锻造\((k_{p} = 1.4~.10^{{ - 13}} g^{2} .cm^{{ - 4}} .s^{{ - 1}} ) \)样品在暴露 1000 小时后会发生分离氧化。这些观察结果在湿空气中得到强调，因为锻造试样在 100 小时后呈现灾难性氧化，而抛物线行为\((k_{p} = 7.0~.10^{{ - 14}} g^{2} .cm^{{ - 4}} .s^{{ - 1}} )\)在 SLM 样品的 1000 小时暴露期间一直观察到。对于 SLM 样品观察到的更好的行为可以通过致密且连续的 Cr ₂ O ₃保护层的生长来解释。