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電鍍-高溫氧化制備Cr2O3阻氚涂層
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華中科技大學材料成形與模具技術(shù)國家重點實驗室

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國家磁約束聚變能研究專項（課題編號2013GB110005）國家自然科學基金（51272079, 51002054）


Cr2O3 Coating Prepared by Electroplating-high Temperature Oxidation as Tritium Permeation Barrier
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State Key Laboratory of Materials Processing and Die and Mould Technology, College of Materials Science and Engineering, Huazhong University of Science and Technology

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Chinese National Fusion project for ITER (2013GB110005) and the National Natural Science Foundation of China (51272079, 51002054)

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    摘要:

    采用電鍍-高溫氧化技術(shù)在321不銹鋼基材表面制備出了Cr2O3涂層，研究了氧化時間及氧化溫度對涂層組織結(jié)構(gòu)和表面形貌的影響。利用XRD、SEM、EDS等分析測試手段對涂層的組織結(jié)構(gòu)、元素分析及形貌進行了表征，并對涂層的抗腐蝕性能和阻氫性能進行了測試。結(jié)果表明，電流密度為0.3 A/cm2、氧化溫度為700 oC、氧化時間為4 h下獲得的Cr2O3涂層，晶粒尺寸均勻，約為1 μm，晶粒之間結(jié)合緊密，孔隙少；Cr2O3涂層與基材之間存在Cr-O的過渡層，使Cr2O3涂層與基材結(jié)合緊密，界面處無空洞、裂紋等缺陷；且該涂層具有良好的抗腐蝕性能（0.98 10-4?μA/cm2）和抗熱沖擊性能（300次），阻氫滲透性能比基材提高了10.5倍。

    Abstract:

    Cr2O3 coating was successfully prepared on the surface of 321 steel substrate by electroplating-high temperature oxidation technology. The influence of oxidation treatment and oxidation time were investigated. The microstructures, elemental distribution and morphology of the coatings were characterized by XRD, SEM and EDS, respectively. The hardness, corrosion resistance and hydrogen resistance of the coatings were tested. The results show that the obtained Cr2O3 coating has tightly combined grains with uniform grain size of about 1 μm and low porosity when the oxidation temperature at 700 oC. The existence of a Cr-O transition layer between Cr2O3 coating and the substrate enables interfaces to bond closely. And no holes, cracks and other defects are found in interfaces. The coating exhibits good corrosion resistance, heat resistance of impact performance (300 times), resistance to hydrogen permeability increased by 10.5 times.

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狄姣.電鍍-高溫氧化制備Cr2O3阻氚涂層[J].稀有金屬材料與工程,2019,48(2):656~661.[di jiao. Cr2O3 Coating Prepared by Electroplating-high Temperature Oxidation as Tritium Permeation Barrier[J]. Rare Metal Materials and Engineering,2019,48(2):656~661.]
DOI：10.12442/j. issn.1002-185X.20170346

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  • 收稿日期:2017-04-28
  • 最后修改日期:2017-10-11
  • 錄用日期:2017-11-09
  • 在線發(fā)布日期: 2019-03-15
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