| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Surface Engineering III
|
| Presentation Title |
Modifying Corrosion Performance of Plasma Electrolytic Oxidation (PEO) Coatings using Potassium Hydroxide (KOH) and Potassium Fluoride (KF) Additives |
| Author(s) |
Navid Attarzadeh, Maryam Molaei, Arash Fattah-alhosseini |
| On-Site Speaker (Planned) |
Navid Attarzadeh |
| Abstract Scope |
We investigated the effects of two additives on microstructures and corrosion performance of coatings produced using the PEO method on commercially pure titanium substrates. The surface morphology of coatings was examined using scanning electron microscopy (SEM). We found coatings prepared with KOH additives had a uniform and more compact structure. Although the number of surface pores was larger for PEO coatings with KOH additives, the average size of pores was shorter, and no crack was found on the surface. Using KF additives led to the formation of thicker coatings, however, these coatings showed a weaker affinity to the substrate. Both coatings were composed of TiO2 (rutile and anatase) and TiAl2O5 phases, while the anatase content was lower for coatings with KOH additives. We understood that KOH additives could result in formation of coatings with greater corrosion resistance, which was attributed to the formation of PEO coatings with modified surface characteristics. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Titanium, Ceramics, Surface Modification and Coatings |