Corrosion behavior of WC-Co cermet coatings
Metal-ceramic composite or cermet coatings have become popular due to their enhanced wear and corrosion resistance properties. Cermet consists of ceramic particulate embedded in a metallic binder. WC-Co coatings are often used in applications that require wear resistance, but there are many applicat...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Conference or Workshop Item |
| Published: |
2014
|
| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/6483/ http://eprints.uthm.edu.my/6483/1/ICoFM_2014_65.pdf |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Metal-ceramic composite or cermet coatings have become popular due to their enhanced
wear and corrosion resistance properties. Cermet consists of ceramic particulate embedded in a
metallic binder. WC-Co coatings are often used in applications that require wear resistance, but
there are many applications in which thermally sprayed coatings have been deposited on
components that operate under both abrasive and corrosive condition. Thus, in this study, the
corrosion behavior of WC-12wt%Co in different electrolyte has been evaluated. Electrochemical
test has been done in three electrolytes namely 0.5 M hydrochloric acid, HCl, 0.5 M sulfuric acid,
H2SO4 and 0.5 M sodium hydroxide, NaOH. It is found that corrosion potential of this coating in
acidic environment is more positive compares to in alkaline environment. Both in acid and alkaline
electrolyte, binder dissolution were preferential. It may be concluded that this coating have higher
corrosion resistance in alkaline electrolyte than in acid electrolyte. |
|---|