Growth, corrosion, and wear study of nanocomposite PEO coating in electrolyte containing nickel sulfate

Journal of Ultrafine Grained and Nanostructured Materials

Seyed Saeed Farhadi¹  Ali Abolhasani¹  Alireza Sabour Rouhaghdam¹  Mahmood Aliofkhazraei¹  Masoud Asgari² 

[1] Department of Materials Science, Faculty of Engineering, Tarbiat Modares University, Tehran, Iran, P.O.Box: 14115-143.;Department of Materials Science, Faculty of Engineering, Tarbiat Modares University, Tehran, Iran, P.O.Box: 14115-143;

关键词: aluminum;    corrosion;    electrolyte;    nanocomposite;    nickel sulfate;    plasma electrolytic oxidation;   

DOI  :  10.7508/jufgnsm.2015.02.008

来源: DOAJ

【 摘 要 】

Plasma electrolytic oxidation (PEO) was performed on a 1010 Aluminum alloy. To achieve thenanocomposite structure, Si3N4 nanoparticles were added into the electrolyte. In an alkaline aqueoussuspension (silicate-based), the effect of adding NiSO4 on the applied voltage, microstructure,composition, wear, and corrosion resistance of PEO coatings was investigated using ScanningElectron Microscopy (SEM), elemental analysis with Energy Dispersive Spectroscopy (EDS), X-RayDiffraction (XRD), cyclic polarization test, and pin-on-disk wear test. The results showed that addingnickel sulfate (NiSO4) and infiltration of its constituents into coatings lead to a more favored corrosionbehavior. Moreover, in the case of best sample, anodic current at the highest applied potentialcondition during the cyclic polarization test indicated a drop within two decades. Moreover,coefficient of friction decreased almost by half.

【 授权许可】

Unknown