Application of Taguchi Method for Characterization of Corrosion Behavior of TiO₂ Coating Prepared by Sol‐Gel Dipping Technique

Abstract

Titanium oxide (TiO2) nanoparticle coatings were deposited on the 316L stainless steel substrates by sol‐gel method. The morphology, structure, and corrosion resistance of the coating were analyzed using SEM, AFM, X‐ray diffraction, and electrochemical techniques. The deposition parameters employed to realize the anticorrosion performance including calcinations temperature, polyethylene glycol (PEG) content, pH value, and number of dipping cycles were investigated. Taguchi statistical experiments were carried out to determine the influence of the deposition variables on anticorrosion properties and optimal conditions. The results indicated that a higher anticorrosion performance of TiO2 films could be achieved using 1 g of PEG in a sol with pH in range of 7–9, six cycles of dipping, and calcination temperature at 400°C. The Tafel polarization measurements indicate that icorr value decreases about 200 times and the Rcorr value increases around 57 times compared with uncoated 316L stainless steel.

Anticorrosion assessment of Al2O3‐TiO2 composite thin films derived from sol‐gel dipping technique

“…The characteristics of composite materials are influenced by their components, which can be designed in synthesizing new materials. As mentioned in previous studies, TiO 2 thin film could diminish corrosion current density and make the steel substrate passive . On the other hand, Al 2 O 3 as a ceramic material with high hardness has been identified as causing the increase in corrosion resistance and improving surface hardness when it is applied on steel .…”

Exploring a new phenomenon in the bactericidal response of TiO2 thin films by Fe doping: Exerting the antimicrobial activity even after stoppage of illumination

“…This sol is deposited as a thin film on a substrate by various methods including dipping, spinning, spraying, etc. [17][18][19].…”

“…The formation of TiO 2 -PEG complex enhances the surface morphology. This topic has been investigated by statistical method, elsewhere [17]. On the other hand, the optical properties influence by the temperature at which the thin films are deposited via dip coating process from a PEG containing sol [20].…”

“…As an extension of an earlier study [17], PEG was added to prepared sol to increase its colloidal stability and adhesion between green coat and substrate. Then, the antibacterial performances of coated samples were investigated against E.…”

Surface Modification of TiO2 Nanoparticles with Vitamin B12: Relationships between Vitamin B12 Content and Its Optical Properties

“…6 Sensitization of TiO 2 NPs and Fe-TiO 2 NPs by addition of VB 12 solution was reported by Gharagozlou et al [7][8] Also Shimakoshi et al immobilized VB 12 on TiO 2 particles. 9 As a semiconductor ceramic, TiO 2 has unique optical, 10 chemical and biochemical 11 properties that render it an efficient material for several applications, including biomedical science, [12][13][14] anticorrosion thin films, 15 water treatment 16 and solar cells. 17 Some characteristics of TiO 2 vary by modifying its nanoparticles and researchers have tried to enhance this material for photochemical, biological, environmental and medical applications.…”