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Journal of Chinese Society for Corrosion and protection  2019, Vol. 39 Issue (5): 423-430    DOI: 10.11902/1005.4537.2019.156
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Effect of Magnetron Sputtering Process Parameters on CrN Films on 304 Stainless Steel and TheirCorrosion Behavior
LUO Hong,GAO Shujun,XIAO Kui,DONG Chaofang(),LI Xiaogang
National Materials Corrosion and Protection Science Data Center, Institute for Advanced Materials and Technology, University of Science and Technology Beijing, 100083 Beijing, China
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Abstract  

CrN films on 304 stainless steel were prepared by magnetron sputtering. The effect of N2 partial pressure, sputtering power and inclusion quantity of the steel on the structure, composition and corrosion resistance of the prepared films was investigated by means of X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results show that the increase of nitrogen partial pressure is beneficial to the increment of CrN-phase content for the CrN film, while which presents obviously the preferential orientations of the crystal planes (111) and (200) of CrN-phase. Reducing the sputtering power is beneficial to generate the increased amount of Cr to participate in the reaction with nitrogen and thus generate more CrN. The amount of inclusions on the steel surface has significant influence on the quality of films, and the inclusions sites are not conducive to the integrity of the prepared CrN films, which, correspondingly, results in significant degradation of corrosion resistance for the prepared CrN films.

Key words:  304 stainless steel      magnetron sputtering      plating      corrosion     
Received:  13 September 2019     
ZTFLH:  TG172  
Fund: National Key Research and Development Program of China(2017YFB0702300);National Material Environment Corrosion Platform(2005DKA10400);National Natural Science Foundation of China(51671029)
Corresponding Authors:  Chaofang DONG     E-mail:  cfdong@ustb.edu.cn

Cite this article: 

LUO Hong,GAO Shujun,XIAO Kui,DONG Chaofang,LI Xiaogang. Effect of Magnetron Sputtering Process Parameters on CrN Films on 304 Stainless Steel and TheirCorrosion Behavior. Journal of Chinese Society for Corrosion and protection, 2019, 39(5): 423-430.

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https://www.jcscp.org/EN/10.11902/1005.4537.2019.156     OR     https://www.jcscp.org/EN/Y2019/V39/I5/423

Fig.1  XRD spectra of CrN films under different nitrogen partial pressures
PhasePeak positionPlan
CrN43.73763.54200220
Cr44.39264.536110200
304 substrate44.48464.777------
Table 1  Partially similar peak position of CrN, Cr and 304 stainless steel substrates
Fig.2  Peak separation results of XRD under different nitrogen partial pressures: (a, c) 60%N2, (b, d) 80%N2
Fig.3  SEM images (a, c) and EDS results (b, d) of CrN under 60% (a, b) and 80% (c, d) nitrogen partial pressures
Fig.4  Cr-N binary phase diagram[12]
Fig.5  XRD results of CrN films under different power levels
Fig.6  Peak separation results of XRD under different power levels: (a, c) 400 W, (b, d) 200 W
Fig.7  SEM image (a) and EDS results (b) of CrN under power level of 200 W
Fig.8  Morphology (a) and composition (b) of inclusions in 304 stainless steel
Fig.9  Morphology of inclusions after sputtering (a), the magnified image of circle area in Fig.9a (b), element mapping images of Cr (c) and N (d)
Fig.10  Surface morphologies of 304 stainless steel with 0.0429% (a), 0.0326 (b), 0.0198% (c) inclusion contents and their polarization curves in 3.5%NaCl solution after sputtering (d)
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