Abstract In this study, we performed three surface modifications for AISI H13 steel to study their protective effects in 1023 K molten aluminum. Results showed that air oxidation can produce a thin film of Fe2O3 and little FeO, and the liquid-nitriding formed a surface of iron nitrides and oxides (Fe2O3 + Fe3O4). While liquid-nitriding with post-oxidation can form a surface of Fe3O4 and little Fe2O3 by oxidizing the nitrides into Fe3O4 on the liquid-nitriding samples. The Fe3O4 has low wettability and good chemical stability against molten aluminum, thus the corrosion behaviors of molten aluminum to the samples change from dissolution to oxidation.

中文翻译：

---

抗 AISI H13 钢铝液腐蚀的表面改性研究

摘要 在本研究中，我们对 AISI H13 钢进行了三种表面改性，以研究它们在 1023 K 铝液中的保护作用。结果表明，空气氧化可产生Fe2O3薄膜和少量FeO，液体氮化形成铁氮化物和氧化物（Fe2O3+Fe3O4）表面。而后氧化的液体氮化可以在液体氮化样品上通过将氮化物氧化成 Fe3O4 来形成 Fe3O4 和少量 Fe2O3 的表面。Fe3O4对铝液的润湿性低，化学稳定性好，因此铝液对试样的腐蚀行为由溶解转变为氧化。