Journal
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
Volume 14, Issue 1, Pages 826-837Publisher
ESG
DOI: 10.20964/2019.01.81
Keywords
Aluminum alloy; TiN; ZrN; Magnetron sputtering; Corrosion
Categories
Funding
- National Key Research and Development Program of China [2017YFB 0702300]
- National Natural Science Foundation of China [51671029]
- Fundamental Research Funds for the Central Universities [FRF-TP-17-002B]
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In this study, the corrosion properties of TiN and CrN coatings on aluminium alloy fabricated by magnetron sputtering were studied by using electrochemical techniques such as potentiodynamic measurement and salt spray tests. Results showed that CrN coatings exhibited a better corrosion resistance on aluminium alloy when compared to TiN coatings with the same thickness. The inferior corrosion performance of TiN coating is not a result of the intrinsic corrosion behaviour of the nitride coating itself but is a result of small structural defects, e.g., pinholes and cracks formed during deposition, which act as channels for the corrosion of the substrate.
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