Effect of C/Si Ratio on the Electrochemical Behavior of a-SiCx:H Coatings on SS301 Substrate Deposited by PECVD | Zendy

D. Li | Zendy; Srinivasan Guruvenket | Zendy; Jerzy A. Szpunar | Zendy; J.E. Klemberg-Sapieha | Zendy

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Effect of C/Si Ratio on the Electrochemical Behavior of a-SiC_x:H Coatings on SS301 Substrate Deposited by PECVD

Author(s) -

D. Li,

Srinivasan Guruvenket,

Jerzy A. Szpunar,

J.E. Klemberg-Sapieha

Publication year - 2014

Publication title -

international journal of corrosion

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.312

H-Index - 18

eISSN - 1687-9333

pISSN - 1687-9325

DOI - 10.1155/2014/565109

Subject(s) - materials science , substrate (aquarium) , analytical chemistry (journal) , carbide , amorphous solid , metallurgy , crystallography , chemistry , geology , oceanography , chromatography

Amorphous hydrogenated silicon carbide (a-SiCx:H) coatings were deposited on stainless steel 301 (SS301) using plasma enhanced chemical vapor deposition with the methane gas flow ranging from 30 to 90 sccm. XRD spectra confirmed the amorphous structure of these coatings. The as-deposited coatings all exhibited homogenous dense feature, and no porosities were observed in SEM and AFM analysis. The a-SiCx:H coatings remarkably increased the corrosion resistance of the SS301 substrate. With the increase of the C concentration, the a-SiCx:H coatings exhibited significantly enhanced electrochemical behavior. The a-SiCx:H coating with the highest carbon concentration acted as an excellent barrier to charge transfer, with a corrosion current of 3.5×10-12 A/cm2 and a breakdown voltage of 1.36 V, compared to 2.5×10-8 A/cm2 and 0.34 V for the SS301 substrate

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