吴姚莎,王迪,曾德长.纳米 NiCrBSi-TiB2 涂层在硫酸熔盐中的热腐蚀行为研究[J].表面技术,2015,44(4):113-117.
WU Yao-sha,WANG Di,ZENG De-chang.Hot Corrosion Behavior of the Nanostructured NiCrBSi-TiB2 Coating in Molten Sulfate Salt[J].Surface Technology,2015,44(4):113-117 |
| 纳米 NiCrBSi-TiB2 涂层在硫酸熔盐中的热腐蚀行为研究 |
| Hot Corrosion Behavior of the Nanostructured NiCrBSi-TiB2 Coating in Molten Sulfate Salt |
| 投稿时间：2014-12-14 修订日期：2015-04-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2015.04.020 |
| 中文关键词: 纳米涂层 热腐蚀 TiB2 Na2SO4-30% K2SO4 |
| 英文关键词:nanostructured coating hot corrosion TiB2 Na2 SO4 -30% K2 SO4 |
| 基金项目:广东省自然科学基金项目(S2013040016360);中山市科技计划项目(20123A380) |
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| 中文摘要: |
| 目的 研究纳米 NiCrBSi-TiB2 涂层在 800 ℃下的 Na2SO4-30% (质量分数)K2SO4 熔盐中的热腐蚀行为。 方法 采用超音速火焰技术在中碳钢表面喷涂纳米 NiCrBSi-TiB2 涂层,以饱和 Na2SO4-30%K2SO4溶液为腐蚀介质,研究该涂层在 800 ℃时的热腐蚀行为。 结果 微米涂层晶粒粗大,Si 的扩散系数低,易出现贫 Si 富 Cr 层,形成的 Cr2O3 膜在碱性熔盐中具有较低的溶解度,对涂层具有良好的保护作用。结论 微米涂层在 Na2SO4-30% K2SO4 熔盐中具有更优的抗热腐蚀性能。 |
| 英文摘要: |
| Objective To study the hot corrosion behavior of the NiCrBSi-TiB2 coating in molten Na2SO4-30% K2SO4 salt at 800 ℃. Methods The nanostructured NiCrBSi-TiB2 coating was sprayed on the surface of carbon steel by high velocity oxy-fuel (HVOF), and its hot corrosion behavior at 800 ℃ was investigated using saturated Na2SO4-30% K2SO4 solution as the corrosion medium. Results The micron coating had coarse grains, and the diffusion coefficient of Si was low, which easily led to the formation of Si-depleted Cr-rich layer, and the Cr2 O3 film formed had relatively low solubility in basic molten salt, which could well protect the coating. Conclusion The micron coating had higher resistance against hot corrosion in molten Na2 SO4 -30% K2 SO4 salt. |
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