It was also found that the coatings formed using a bipolar or hybrid (unipolar + bipolar) current mode showed lower COF values and wear rates due to their modified coating microstructure and surface morphology.
Electrochemical performance of the modified coating was investigated and compared with neat polyester coating using potentiodynamic polarization study and exposing the coated samples to salt spray environment and UV weathering.
It was shown that zinc modified coating exhibited very low permeability and provided important cathodic protection to MS for considerably long immersion period.
To improve the uniformity of spray-on films, we have recently developed, implemented, and tested a modified coating technique, termed as substrate vibration-assisted spray-coating (SVASC), in which during the spraying process, controlled ultrasonic vibration is imposed on the substrate [10 12].
The siloxane modified coating was found to have improved electrochemical and mechanical properties along with excellent hydrophobicity, as compared to the neat polyester coating.
Pack chromization process provides a surface modified coating on steel surface with high hardness, corrosion and temperature resistance.
Results from electrochemical and SEM surface analyses reveal prolonged corrosion protection with better performance obtained for the modified coating matrices due to their reticulated make-up and effective barrier properties against the diffusion of aggressive species.
The sliding friction and wear behavior of Ni P modified coating was investigated using a ball-on-disk technique under an applied load of 30 N.
Furthermore, refractory metal-containing precipitates in the outer two phase layer of the platinum modified coating were replaced by silicides in the corresponding (Si,Pt -modified aluminide coating.
In the results of EIS, the corrosion protection of epoxy modified coating by ABP shows better than epoxy modified coating by ATP.
The enhanced properties of the modified coating were justified in terms of its microstructure.
