Corrosion protection of NiNb metallic glass coatings for 316SS by magnetron sputtering

被引:1
作者
LJiang [1 ,2 ,3 ]
ZQChen [4 ,5 ,3 ,1 ]
HBLu [6 ]
HBKe [4 ]
YYuan [1 ]
YMDong [1 ]
XKMeng [2 ]
机构
[1] School of Chemistry and Life Sciences, Suzhou University of Science and Technology
[2] Institute of Materials Engineering, National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Nanjing University
[3] Institute of Materials Engineering, Nanjing University
[4] Songshan Lake Materials Laboratory
[5] Institute of Physics, Chinese Academy of Sciences
[6] College of Chemistry and Chemical Engineering, Nantong University
关键词
Magnetron sputtering; NiNb; Metallic glasses; Multilaye; Corrosion protection;
D O I
暂无
中图分类号
TG174.4 [金属表面防护技术];
学科分类号
080503 ;
摘要
Metallic glasses(MGs) appear as promising anti-corrosion coating materials due to their microstructural and physicochemical advantages. Herein, we proposed magnetron sputtered Ni Nb thin film MG coatings(MGCs) with different structures and compositions for corrosion protection of 316 stainless steel in an aggressive saline environment. The properties of monolayered Ni50 Nb50 and Ni60 Nb40, as well as the multilayered Ni50 Nb50/Ni60 Nb40(at.%) MGCs, were characterized in terms of morphology and microstructural properties, as well as the anticorrosion behavior. All the Ni Nb MGCs presented compact structure and the monolayered coatings exhibited preferable adhesion properties in comparison with the multilayered coating. The electrochemical tests and XPS results imply that the monolayered Ni50 Nb50 MGC with high Nb content resisted corrosion mainly due to the formation of stable passive film that contained abundant Nb2 O5 species, whereas the Ni60 Nb40 MGC with high Ni content showed week corrosion protection performance during long-term service due to the dissolution of Ni cations and the devastation of the coating structure. Though with bit worse adhesion and more vulnerable Ni60 Nb40 layers, the multilayered Ni50 Nb50/Ni60 Nb40 MGC possessed comparable corrosion resistance with the monolayered Ni50 Nb50 MG coating, which remained stable even after 32 days of exposure. Such performance should be ascribed to the combined eff;ect of the repassivation property for the sub-layers, the hindrance of propagation paths of micro-defects, and the obstruction of corrosive species by interfaces in the multilayered coating.
引用
收藏
页码:88 / 98
页数:11
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