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    刘英坤, 陈和兴, 余志明, 邓畅光, 刘凤举. NiCoCrAlY涂层的抗中性盐雾腐蚀性能[J]. 机械工程材料, 2008, 32(10): 52-55.
    引用本文: 刘英坤, 陈和兴, 余志明, 邓畅光, 刘凤举. NiCoCrAlY涂层的抗中性盐雾腐蚀性能[J]. 机械工程材料, 2008, 32(10): 52-55.
    shu
    LIU Ying-kun, CHEN He-xing, YU Zhi-ming, DENG Chang-guang, LIU Feng-ju. Salt Spray Corrosion Performance of NiCoCrAlY Coating[J]. Materials and Mechanical Engineering, 2008, 32(10): 52-55.
    Citation: LIU Ying-kun, CHEN He-xing, YU Zhi-ming, DENG Chang-guang, LIU Feng-ju. Salt Spray Corrosion Performance of NiCoCrAlY Coating[J]. Materials and Mechanical Engineering, 2008, 32(10): 52-55.
    shu

    NiCoCrAlY涂层的抗中性盐雾腐蚀性能

    Salt Spray Corrosion Performance of NiCoCrAlY Coating

      摘要
    • 摘要: 通过中性盐雾腐蚀试验研究了低膨胀高温合金GH907基体上采用低压等离子喷涂制备的NiCoCrAlY涂层和NiCr涂层的抗腐蚀性能,并对其腐蚀形貌与产物进行了分析.结果表明：盐雾腐蚀500 h后,NiCoCrAlY涂层表面出现了失光变色,在表面出现了几个无破坏性的腐蚀坑,涂层表面大部分仍保持较好的完整性,其腐蚀等级仅下降到9级;而NiCr涂层的表面出现了较多的腐蚀斑点,涂层的完整性已经被破坏,涂层表面产生了腐蚀裂纹,其腐蚀等级下降到4级;腐蚀产物主要为镍、铁、钴等的氧化物,NiCoCrAlY涂层表现出较强的抗中性盐雾腐蚀性能.

       

      Abstract: The corrosion performance of NiCoCrAlY coating obtained by LPPS (low pressure plasma spray) on low expansion GH907 superalloy was investigated by 500 h neutral salt spray testing in comparison with NiCr coating.The results showed that NiCoCrAlY coating lost its gloss,a few corrosion pits were observed and most coating remained to be integral and smooth.Its corrosion grade only reduced to the 9th grade after 500 h testing.On the other hand,the integrity and uniformity of NiCr coating was damaged and some cracks appeared in the coating,and the corrosion grade was lowed to the 4th grade after testing for 500 h.The corrosion products were mainly composed of oxides of Ni,Fe,Co etc.The NiCoCrAlY coating exhibited fairly good neutral salt spray corrosion resistance.

       

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