Formation and surface characterization of nanostructured Al2O3�?�TiO2 coatings

Bulletin of materials science

Vairamuthu Raj¹  Mohamed Sirajudeen Mumjitha¹ 

[1] Advanced Materials Research Laboratory, Department of Chemistry, Periyar University, Salem 636 011, India$$Advanced Materials Research Laboratory, Department of Chemistry, Periyar University, Salem 636 011, IndiaAdvanced Materials Research Laboratory, Department of Chemistry, Periyar University, Salem 636 011, India$$

关键词: Al2O3â€�?�TiO2 nanoceramic coatings;    formation mechanism;    surface characteristics;    corrosion studies.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

One pot synthesis of Al₂O₃â€�?�TiO₂ nanoceramic coatings from environment-friendly potassium titanium oxalate (PTO) electrolyte using facile electrochemical anodization has been reported for the first time. Systematic analysis of the anodization parameters such as applied current density and concentration of the PTO electrolyte influence on the morphology of the ceramic coatings was done. The textural properties of the coatings (thickness, growth rate, coating ratio) showed a linear regime with current density and electrolyte concentration decreases up to a certain level and then decreases. The growth process, distribution of chemical elements, phase constitutions and corrosion resistance of the coatings were investigated by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), Tafel polarization technique and electrochemical impedance spectroscopy (EIS). The relation between the corrosion resistivity of the anodic coating and the aforementioned anodization parameters is investigated. The mechanisms that are involved in the formation of the ceramic coatings are also discussed. The coatings formed from 30 g/L concentration of PTO and 0.02 A/cm² current density show good morphology, textural properties and optimum corrosion resistance.

【 授权许可】

Unknown