Characterization of WC-Co coatings corrosion product by raman spectroscopy
In cermet coating such as WC-based coating, the coexisting of ceramic and metal results in micro-galvanic corrosion due to different corrosion potential of each element. In this study, WC-17wt%Co was used. The corrosion behaviour of the coating was evaluated by potentiodynamic test in two different...
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| Main Authors: | , |
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| Format: | Conference or Workshop Item |
| Published: |
2014
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| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/5881/ http://eprints.uthm.edu.my/5881/1/Characterization_of_WC%2DCo_Coatings.pdf |
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| Summary: | In cermet coating such as WC-based
coating, the coexisting of ceramic and
metal results in micro-galvanic corrosion
due to different corrosion potential of each
element. In this study, WC-17wt%Co was
used. The corrosion behaviour of the
coating was evaluated by potentiodynamic
test in two different electrolyte which are
0.5 M sulphuric acid and 3% by weight
alkaline drilling fluid. This coating shows
higher corrosion potential in acid
electrolyte compares to in alkaline
electrolyte. Clear passivation is seen for
both cases. Raman shift is able to detect
W03 and W03H20 as a corrosion product
after corrosion test. |
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