characterization and corrosion behavior of nanocomposites coating on SS 316L

Document Type : Research Paper


Dept. production Engineering and metallurgy, University of Technology, Baghdad, Iraq


In this study, the Produce a Nanobiocomposite coating layers by using (EPD) DC Current with deposition condition (90V, 3 min, 4% C) for Polyetheretherketone (PEEK) and (PEEK/HA) and (60V, 2 min, 3%C) for (PEEK/HA/ZnO) on stainless steel 316L with of roughness (0.06μm corresponded to 500 emery paper SiC) by using (EPD) DC Current then, study the corrosion behavior by evaluating the coating layers in relation to the corrosion resistance which was excellent compared to the substrate. Cr ion release test using (AAS) was carried out, and the result is reducing the release of ions from the substrate by coating layer is about 80%. Porosity determined using the Image j program was percentage on the surface of all coatings was good and within the acceptable range between (1%- 2%). Measuring the roughness by (AFM) evinced that the coating surfaces have an excellent roughness (Ra) between (2.12 nm) and (4.13 nm). The tape test method (adhesion) indicated that the removal area of the substrate coatings layer ranged from (2.6%) to (9%). XRD validated the all coating material peaks and confirmed the phases of the deposited coating layers. The results proved that EPD has no effect on the coating composition.