采用双层辉光等离子表面合金化技术在Q235钢表面制备钽改性层及其耐蚀性

Ta Modified Layer Prepared on Q235 Steel by Double Glow Plasma Surface Alloying Technology and It′s Corrosion Resistance

摘要: 采用双层辉光等离子表面合金化技术在Q235钢表面制备钽改性层, 并对钽改性层的组织、成分及耐蚀性能进行了研究。结果表明: 改性层中的钽元素含量呈梯度分布, 改性层与基材结合良好;钽改性层的耐蚀性明显优于基材的, 其保护效率高达99.88%;钽改性层形成的钝化膜完整, 能很好地保护基材。

Abstract: The microstructure, composition and corrosion resistance of Ta modified layer which obtained on low carbon steel Q235 by double glow plasma surface metallurgy technology were studied . The results show that the tantalum element distributed gradually from the surface to substrate, Ta modified layer was well bonded to the substrate. The corrosion resistance of Ta modified layer obviously was better than that of the substrate, and it′s protection efficiency was 99.88%. The passive film on Ta modified layer was integral and could protect the substrate efficiently.