| 纳米 NiCrBSi-TiB2 涂层在硫酸熔盐中的热腐蚀行为研究 |
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| 引用本文： | 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. |
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| 作者姓名： | 吴姚莎 王迪 曾德长 |
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| 作者单位： | 1. 中山火炬职业技术学院 光电工程系,广东 中山,528436;2. 华南理工大学 材料科学与工程学院,广州,510640 |
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| 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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| 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。
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| 关 键 词： | 纳米涂层 热腐蚀 TiB2 Na2 SO4-30％K2 SO4 |
| 收稿时间： | 2014/12/14 0:00:00 |
| 修稿时间： | 2015/4/20 0:00:00 |
Hot Corrosion Behavior of the Nanostructured NiCrBSi-TiB2 Coating in Molten Sulfate Salt |
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| WU Yao-sh,WANG Di and ZENG De-chang.Hot Corrosion Behavior of the Nanostructured NiCrBSi-TiB2 Coating in Molten Sulfate Salt[J].Surface Technology,2015,44(4):113-117. |
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| Authors: | WU Yao-sh WANG Di and ZENG De-chang |
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| Affiliation: | Optoelectronic Engineering Department, Zhongshan Torch Polytechnic, Zhongshan 528436, China,School of Materials Science & Engineering, South China University of Technology, Guangzhou 510640, China and School of Materials Science & Engineering, South China University of Technology, Guangzhou 510640, China |
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| Abstract: | ABSTRACT:Objective To study the hot corrosion behavior of the NiCrBSi-TiB2 coating in molten Na2 SO4-30% K2 SO4 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 Na2 SO4-30% K2 SO4 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 forma-
tion of Si-depleted Cr-rich layer, and the Cr2 O3 film formed had relatively low solubility in basic molten salt, which could well pro-tect the coating. Conclusion The micron coating had higher resistance against hot corrosion in molten Na2 SO4-30%K2 SO4 salt. |
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| Keywords: | nanostructured coating hot corrosion TiB2 Na2 SO4 -30% K2 SO4 |
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