Chemical Conversion Treatment Research Articles

THE CORROSION INHIBITION EFFECT ON THE ALUMINUM ALLOY AZ91C'S FATIGUE BEHAVIOR IN THE SALINE ENVIRONMENT

Investigations were made into the fatigue in the magnesium alloy AZ 91C cast in corrosive fluids and air at varied NaCl solution concentrations. Fatigue specimens will be subjected to surface stress testing in corrosive conditions with a stress amplitude of 75 MPa both after and before coating. To comprehend the behavior of the magnesium material, its fatigue life, corrosion product (X-ray spectra), and fracture properties will be examined. The corroding medium (NaCl) has been found to significantly shorten the fatigue life of the magnesium alloy AZ91C. Chemical conversion treatment was applied to the AZ91C alloy to improve corrosion resistance and corrosion fatigue resistance. MgSnO3 was found in the XRD patterns of the stannite-treated AZ91C alloy, and this treatment slightly improved the alloy's corrosion resistance in an alkaline stannite solution with a pH of 7. H2O and SEM images demonstrate that chloride ions can penetrate the substrate through porous structures.

Study of ZnAl Hydroxides-Based Thin Films to Enhance the Filiform Corrosion Resistance of Acrylic-Coated AA5005

In recent years, the imperative to adopt a sustainable approach to aluminum coating pre-treatments due to environmental concerns has engaged researchers in corrosion studies. This work investigates Zn-Al hydroxides-based conversion coatings developed on AA5005 to enhance filiform corrosion (FFC) resistance. The conversion coatings were applied as a pre-treatment (200 nm–800 nm thick, depending on synthesis conditions) prior to coating with acrylic paint. The synthesis of the Zn-Al hydroxides conversion coating involves a rapid hydrothermal method at near-neutral pH. Electrochemical tests performed on the ZnAl hydroxides conversion coatings onto AA5005 revealed a substantial improvement in localized corrosion resistance. FFC tests in a climatic chamber exhibit a significant decrease (about 50%) in rust creep filament propagation compared to bare AA5005 after 1000 h. Those results were obtained employing Zn and Al salts at neutral pH for ten minutes at 95 °C. The findings obtained suggest that the synthesis process is of potential interest within the context of chemical surface conversion treatments for aluminum. In fact, eco-friendly metallic salts contribute to a more economical and environmentally friendly waste disposal process, making this treatment a potential solution for industrial applications, considering its simplicity, time efficiency, and use of non-toxic products.

The Influence of pH Value on the Microstructure and Properties of Strontium Phosphate Chemical Conversion Coatings on Titanium.

Strontium (Sr) is a trace element in the human body that can promote bone formation and inhibit bone absorption. A conversion coating of strontium phosphate (Sr-P) on the surface of titanium (Ti) can improve its biological properties and has many potential applications in the fields of dentistry and orthopedics. In the present study, Sr-P coatings with SrHPO4 and Sr3(PO4)2 crystals on Ti are prepared by a phosphate chemical conversion (PCC) treatment and the effect of pH values on the properties of the Sr-P coatings is researched. The results prove that the phase composition, morphology, and corrosion resistance of the coated Ti vary according to the pH values of the PCC solution. The morphology of the conversion deposition on Ti changes from plat-like to cluster-like and then to homogeneous microcrystals as the pH value changes from 2.50 to 3.25. Only discrete SrHPO4 crystals are generated on the substrate at lower pH values, while relatively stable Sr3(PO4)2 and SrHPO4 crystals grow and subsequently form an integrated coating on the Ti as the pH exceeds 2.50. The cross-sectional morphologies and bonding strength of different coatings are also researched. The corrosion resistance of coated Ti improves compared with that of bare Ti because of the Sr-P coatings with a Sr3(PO4)2 phase. In addition, it is indicated that the Sr-P coatings on Ti can improve the adhesion and differentiation of BMSCs.

Modeling and optimization of the corrosion resistance of Cr-free and Cr-based chemical conversion coatings on nickel foil by artificial neural network and response surface method

Chemical conversion treatment is one of the most powerful methods to prevent the corrosion of metals. However, determining the optimal addition amount of various active ingredients for the enhancement of corrosion resistance requires a large number of repeated experiments, which is very time-consuming and is also not helpful for figuring out the interactions between active ingredients. In the present study, Cr-free conversion coatings (CFCC) and Cr-based conversion coatings (CCC) were prepared on nickel foil and characterized by scanning electron microscopy and X-ray photoelectron spectroscopy to determine their morphology and composition of them. The corrosion resistance of conversion coatings was measured by salt spray test and further investigated using the response surface method (RSM) and artificial neural network (ANN) approach. The constructed models displayed high predictive accuracy, and the coefficient of correlation value of the RSM-CFCC, ANN-CFCC, RSM-CCC, and ANN-CCC models is 0.9441, 0.9513, 0.9535 and 0.9564, respectively. This comparative study recommends the ANN model best fits the experimental data for both CFCC and CCC. By using the ANN outputs, satisfactory results can be estimated with superior accuracy and efficiency while the RSM model can describe the interactions between factors.

Formation of a calcium hydrogen phosphate coating on AZ41 magnesium alloy by ultrasound-assisted chemical conversion for concrete formwork

The poor anticorrosion property of magnesium alloys is one of main concerns prior to their various applications. In this study, an anticorrosive hydrogen phosphate coating was fabricated via the ultrasound-assisted chemical conversion treatment on AZ41 Mg alloy for concrete formwork. The coatings prepared by the conventional chemical conversion and hydrothermal treatment were also obtained as a comparison. Surface characterizations and electrochemical methods were carried out. Results show that the ultrasound-assisted coating obtained possesses a thickness more than 3 μm, which is thicker than the other two coatings. Moreover, the ultrasound-assisted coating presents a more homogeneous structure on the second phases, while the surface qualities of the other two coatings were significantly reduced due to the inhomogeneous CaHPO4·2H2O (DCPD) formed on the second phases in AZ41 Mg alloy. The ultrasound-assisted chemical conversion coating exhibits a good corrosion resistance even comparable to the hydrothermal coating. It exhibits a corrosion current density on the order of magnitude of 10−7 A·cm−2 even after the embedment of 96 h in the Portland cement (PC) system containing 3.5 wt% NaCl.

Effect of Fluoride Coatings on the Corrosion Behavior of Mg-Zn-Ca-Mn Alloys for Medical Application.

The most critical shortcoming of magnesium alloys from the point of view of medical devices is the high corrosion rate, which is not well-correlated with clinical needs. It is well- known that rapid degradation occurs when an implant made of Mg-based alloys is placed inside the human body. Consequently, the implant loses its mechanical properties and failure can occur even if it is not completely degraded. The corrosion products that appear after Mg-based alloy degradation, such as H2 and OH- can have an essential role in decreasing biocompatibility due to the H2 accumulation process in the tissues near the implant. In order to control the degradation process of the Mg-based alloys, different coatings could be applied. The aim of the current paper is to evaluate the effect of fluoride coatings on the corrosion behavior of magnesium alloys from the system Mg-Zn-Ca-Mn potentially used for orthopedic trauma implants. The main functional properties required for the magnesium alloys to be used as implant materials, such as surface properties and corrosion behavior, were studied before and after surface modifications by fluoride conversion, with and without preliminary sandblasting, of two magnesium alloys from the system Mg-Zn-Ca-Mn. The experimental results showed that chemical conversion treatment with hydrofluoric acid is useful as a method of increasing corrosion resistance for the experimental magnesium alloys from the Mg-Zn-Ca-Mn system. Also, high surface free energy values obtained for the alloys treated with hydrofluoric acid correlated with wettability lead to the conclusion that there is an increased chance for biological factor adsorption and cell proliferation. Chemical conversion treatment with hydrofluoric acid is useful as a method of increasing corrosion resistance for the experimental Mg-Zn-Ca-Mn alloys.

Synthesis and Characterisation of CeO2 Coatings on the AZ31 Alloy for Corrosion Protection and In Vitro Biocompatibility of MC3T3-E1 Pre-Osteoblasts

The use of bioabsorbable metals as temporary medical implants has attracted considerable research interest as they do not require a second surgical operation for removal after the healing process is completed. However, magnesium (Mg) and its alloys have a degradation rate that is too high in biological environments. Therefore, it must be controlled using various strategies. In this study, an AZ31-Mg-based alloy coated with CeO2 is investigated to analyse the effect of the coating on its corrosion protection and biocompatibility. The AZ31 alloy is anodised with NaOH solution, before coating to stabilise the alloy surface. The CeO2 coating is deposited on anodised AZ31 by chemical conversion treatment. The electrochemical properties of samples are evaluated using electrochemical impedance spectroscopy and cyclic polarisation curves using Hank’s solution. Structural and morphological characterisation of the samples are performed using X-ray diffraction and scanning electron microscopy–energy dispersive X-ray spectroscopy. Additionally, biocompatibility is determined by live/dead assay using MC3T3-E1 pre-osteoblasts. The preliminary results indicate that CeO2 coatings exhibit higher electrochemical properties. Additionally, an increase in the ratio of live/dead cells of the AZ31OH-CeO2 surface is detected, in contrast with AZ31, thus indicating improvement in biocompatibility upon CeO2 coating.

Chemical Conversion Treatment of AA5083 Aluminum Alloy and AISI 1045 Carbon Steel under Galvanically Coupled Condition in Na<sub>2</sub>MoO<sub>4</sub>: Effect of pH on Corrosion Resistance

To ascertain the effect of solution pH of Na2MoO4 chemical conversion treatment for aluminum/steel joints on corrosion resistance, AA5083 aluminum alloy and AISI 1045 carbon steel were immersed in 50 mM Na2MoO4 at pH ranges of 8–12 under galvanically coupled condition. Subsequently, in diluted synthetic seawater, the galvanic corrosion resistance of the AA5083 alloy connected to the AISI 1045 carbon steel was assessed. The number of localized corrosion damages was counted, and AA5083 treated at pH 11 was found to be the better corrosion resistance. The oxygen reduction current on bulk Al6(Fe, Mn) decreased with increasing solution pH of the conversion treatment. The Al6(Fe, Mn) particles on AA5083 were not preferential cathodes, and alkalization through oxygen reduction would not occur when the treatment was performed above pH 9. Auger electron spectroscopy analysis showed that Mo-accumulation, Fe-removal, and film thickening occurred on the particles of AA5083 treated at pH 11. These factors contributed to the suppression of the cathodic activity of the Al6(Fe, Mn) particles, resulting in the improved galvanic corrosion resistance of AA5083.

Effect of Chemical Conversion Treatment with Oxalic Acid Solution in the Corrosion Resistance of Galvanized Steel in Soybean Biodiesel with Natural Additives

Effect of Chemical Conversion Treatment with Oxalic Acid Solution in the Corrosion Resistance of Galvanized Steel in Soybean Biodiesel with Natural Additives

Nanostructured, Alkaline Titanate‐Converted, and Heat‐Treated Ti6Al4V Microspheres via Wet‐Chemical Alkaline Modification and their ORR Electrocatalytic Response

AbstractThis study describes the chemical conversion and heat treatment of Ti6Al4V microspheres (Ti6_MS), and the resulting effects on their electrocatalytic properties. The wet‐chemical conversion (5.0 m NaOH, 60 °C, 24 h; Sample label: Ti6_TC) converts the top surface of the Ti6_MS powder into an ≈820 nm thick sodium titanate surface. Heat‐treatment (Ti6_TC_HT) at 450 °C increases the stability of the surface, through partial titanate crystallization, while mitigating excess rutile formation. All samples are analyzed chemically (XPS, EDX, Raman, EELS), structurally (XRD and TEM), and morphologically (SEM, TEM), demonstrating the characteristic formation of sodium titanate dendritic structures, with minimal chemical, structural, and morphological differences due to the 450 °C heat‐treatment. The effect of the preparation methodology on oxygen reduction reaction (ORR) electrocatalytic performance is also tested. The introduction of the sodium titanate layer changes the mechanism of the ORR, from a mixed 4 electron/2 electron pathway to a predominantly 2‐electron pathway. By maintaining the microspherical nature of the material while also tuning the surface of the material toward different reaction mechanisms, a design strategy for new electrocatalyst materials is explored.

Comparative Investigation of the Corrosion Behavior and Biocompatibility of the Different Chemical Conversion Coatings on the Magnesium Alloy Surfaces

Due to their good biodegradability and biocompatibility, magnesium alloys are widely favored as the potential candidate for the biodegradable cardiovascular stent. However, the rapid degradation and the limited biocompatibility in vivo remain the main bottlenecks that inhibit their clinical applications. The construction of the chemical conversion coating on the magnesium alloy surface represents one of the effective strategies to control the degradation rate and enhance the biocompatibility. In the present study, the different chemical conversion layers were prepared on the magnesium alloy surface by chemical conversion treatment, including sodium hydroxide (NaOH), hydrofluoric acid (HF), phosphoric acid (H3PO4) and phytic acid (C6H18O24P6) treatment, and the corrosion behaviors and biocompatibility of the chemical conversion layers were comparatively investigated in detail. The results showed that the different chemical treatments can produce the different conversion layers on the magnesium alloy surfaces with a variety of physicochemical characteristics, corrosion resistance and biocompatibility, and all treatments can enhance the corrosion resistance to varying degrees. The hydrophilicity and corrosion resistance of the sodium hydroxide-treated magnesium alloy were the best among all the materials. Although the hydrofluoric acid-treated magnesium alloy had produced a hydrophobic coating, the corrosion resistance still needed to be improved. Magnesium alloys treated by sodium hydroxide showed a selective promotion of albumin adsorption, while the other samples simultaneously promoted albumin and fibrinogen adsorption. For the blood compatibility, the hemolysis rates of all of the treated materials were reduced to below 5%. The samples treated by phytic acid had the smallest hemolysis rate, and the NaOH-treated magnesium alloy had the least amount of platelet adhesion and activation. An appropriate microenvironment for cell growth could be achieved by the chemical conversion treatment, according to the results of the endothelial cell adhesion and proliferation, and the NaOH-treated surface showed the best endothelial cell growth behaviors among all of the samples. In summary, the corrosion resistance and biocompatibility of the magnesium alloy were significantly improved by the sodium hydroxide treatment, and thus this treatment can be used as a pretreatment for the surface modification of the magnesium alloy in order to further enhance the biocompatibility when used as the cardiovascular implants.

Microstructural characterization and corrosion resistance evaluation of chromate-phosphate/water-soluble resin composite conversion coating on Al surfaces

Chromate-phosphate/water-soluble resin composite conversion coatings (CP/RC) were prepared on the aluminum surface through a non-washing, dip coating-baking chemical conversion treatment method. Chromate-phosphate conversion film (CP) and water-soluble resin conversion film (RC) were also prepared for comparison studies. The CP/RC surface was found to be the most homogeneous, with the strongest protection against aluminum, and was not corroded during a 20-day neutral salt spray (NSS) test and a 3.5 wt% NaCl immersion test. The analysis shows that CP/RC is mainly composed of three parts: the outermost covering layer with the resin as the main body (polymer, AlPO4, CrO3 and Cr2O3); the internal composite conversion layer composed of resin and inorganic skeleton (Al2O3, Cr2O3, CrO3, AlPO4, CrPO4, Al, AlF and polymer); the surface layer of aluminum substrate (Al, Al2O3 and AlPO4). XPS also shows that Cr6+ reacts with resin to form related compounds, which proves that the resin component and inorganic component in the coating are compounded.

Titania-zinc phosphate/nanocrystalline zinc composite coatings for corrosion protection of biomedical WE43 magnesium alloy

Biodegradable medical implants made of magnesium (Mg) alloys must have sufficient corrosion resistance in clinical applications. Herein, a nanocrystalline zinc (Zn) coating is electrodeposited on the WE43 Mg alloy followed by a chemical conversion treatment to produce a titania-Zn phosphate layer. The Zn coating has a rice-like nanostructure and the conversion layer is composed of ZnO, Zn3(PO4)2, and TiO2. The Zn coating reduces the corrosion current density of the WE43 Mg alloy from 151.1 ± 13.8 μA cm−2 to 29.4 ± 7.4 μA cm−2 in the simulated body fluid (SBF), while the composite coating decreases it to 4.1 ± 0.8 μA cm−2. The surface morphology, pH variation, and average corrosion rates after immersion for 7 days in SBF reveal that the Zn coating in fact accelerates dissolution of the Mg substrate due to the formation of galvanic couples between the Zn coating and Mg alloy substrate. In comparison, only slight corrosion is observed from limited areas on the sample with the composite coating. The titania-Zn phosphate/nanocrystalline Zn composite coating provides long-term protection in the physiological environment and the protection mechanism is discussed.

Evaluation of TiO2/CeO2 coating on Ti6Al4V alloy in PBS physiological medium using conventional and near field electrochemical techniques

Ti6Al4V alloy is an exceptional biomaterial compared to other metals used for implants that replace bone tissue. Despite being corrosion-resistant, Ti6Al4V can release ions that may cause adverse effects to tissues after long implantation times. Several researchers have studied the thermal oxidation of this alloy, which generated layers of mainly TiO2 rutile phase to increase its wear and corrosion resistance. However, one of the shortcomings of these layers is their susceptibility to pitting corrosion. To extend the useful life of Ti6Al4V, a coating system consisting of thermally grown TiO2 and CeO2 obtained using chemical conversion treatment was proposed, which would be advantageous owing to its non-toxic, antiseptic, and anticorrosive properties.In this study TiO2 rutile phase was obtained on the surface of Ti6Al4V after quenching at 650 °C for 90 min followed by tempering at 450 °C. Cerium conversion treatments produced a surface film consisting of Ce3+ and Ce4+, which was characterised using X-ray diffraction, scanning electron microscopy, atomic force microscopy, X-ray photoelectronic spectroscopy, cyclic polarisation curves, electrochemical impedance spectroscopy, and scanning Kelvin probe.The obtained coating system reduced the corrosion rate of the substrate: TiO2 worked as main passive film and the cerium coating reduced the susceptibility to pitting corrosion.

Synthesis and properties of SrFe12O19 obtained by solid waste recycling of oily cold rolling mill sludge

The aim of this study was to develop a new approach for the preparation of environmentally friendly, high-value products from oily cold rolling mill (CRM) sludge. Utilizing oily CRM sludge as a source of iron, strontium hexaferrite (SrFe12O19) powders were prepared by multi-step processes involving acid leaching, chemical conversion treatment, and synthesis by a citrate precursor. The influences of citric acid dosage and the pH of the sol system on the formation, crystallite size, and magnetic properties of the obtained SrFe12O19 powders were investigated. High saturation magnetization (74.8 mA-m(2)g(-1)) and intrinsic coercivities (614.46 mT) were achieved for pH 7.0 of the sol system, for which the molar ratio of citric acid dosage to the total dosage of Fe-3+ and Sr2+ was 1.5. This study presents a new approach to utilizing oily CRM sludge, and even refractory iron-containing solid waste.

Effect of carbonate and phosphate conversion pretreatments and optimization on corrosion behaviour of subsequent electroless nickel coating on AZ91 alloy

The study reports a simple two steps chemical conversion treatment to enable electroless nickel (EN) coating on AZ91 alloy without using chromium or fluoride. The process involves calcium dihydrogen phosphate deployed in step 1 followed by the transformation into more insoluble product, for better corrosion and adhesion resistance, via alkali treatment in NaOH or Na2CO3 during step 2. The latter is attempted by varying the concentration in the range 0.25 to 2 M. The performance of conversion treatments is critically evaluated by the quality of the EN coating, deposited subsequently, with respect to morphology, corrosion, and adhesion resistance. The X-ray diffraction (XRD) and Raman analysis of the pretreated surface exhibits complete transformation to tri calcium phosphate or calcium carbonate after treated in NaOH or Na2CO3 solution respectively at an optimum 1 M concentration. The crack dimensions on the surface of thus pretreated AZ91 are largely suppressed, compared to those at <1 M or >1 M NaOH/Na2CO3 concentration, as revealed by scanning electron microscopy (SEM) and 3D profilometer. The EN coating on pretreated substrate at 1 M alkali concentration shows higher corrosion and scratch resistance than that at other concentrations. The 1 M Na2CO3 appears superior to NaOH pretreatment, as it imparts better corrosion and adhesion resistance of the subsequent EN coating. The electrochemical impedance spectroscopy (EIS) on EN coating after 1 M Na2CO3 treatment shows no coating deterioration up to 300 h of exposure to 0.5% NaCl solution as opposed to NaOH (for 100 h only).

A new strategy for developing chitosan conversion coating on magnesium substrates for orthopedic implants

Chitosan as a natural biopolymer was immobilized and chelating-deposited with and without bioactive glass (BG) onto Mg substrates by means of a chemical conversion process at 75 °C to provide anti-corrosion properties, good adhesion and biocompatibility. The aim of the present work was to integrate the surface of biodegradable Mg as a part of the corrosion resistant coating via metal-chitosan complexation process.The surface morphology and composition of the coatings were characterized by Fourier transformed infrared spectroscopy (FTIR), X-ray diffraction (XRD) and scanning electron microscopy (SEM) with energy-dispersive spectroscopy (EDS). The results provided evidence of the formation of a chitosan coating as well as its chelating reaction and immobilization on magnesium by a chemical conversion process. The non-alkalization of the chitosan solution was ascribed to the protective layer of Mg (II)-chitosan complex, which inhibits the further migration of Mg ions. The in vitro bioactivity of both chitosan (CHI)-coated and chitosan/BG (CHI/BG)-coated surfaces in simulated body fluid (SBF) proved the complete retention of chitosan and BG on the magnesium substrates. The XRD analysis of the (CHI/BG) coating after 2 weeks immersion in SBF showed mainly the formation of magnesium hydrogen phosphate hexahydrate and undetected amorphous (Ca, Mg) phosphate. The present study represents a novel attempt to modify the surface of Mg by a simple, one-step chemical conversion treatment in chitosan to form a Mg (II)-chitosan complex layer. Mechanisms for the Mg-chitosan complexation process and for the coating bioactivity behavior in SBF were discussed.

Chemical Conversion Treatment on Stainless Steel 316L By Using TiO2 Thin Films Via Sol-Gel Technique and Adding Niobium and Vanadium As Inhibitors to Enhance Corrosion Resistance

Stainless steel has been used in a wide variety of industries due to its mechanical, anticorrosion and biocompatibility properties. However, its passive layer can be compromised under aggressive environments leading to corrosion. There are several chemical conversion treatments that are applied on the steel’s surface to improve its corrosion resistance. The most commonly used conversion coatings are based on hexavalent chromium, a compound that is carcinogenic and very hazardous pollutant. The new researches are looking for alternatives that achieve the same or better corrosion inhibition. As an alternative less toxic method, this work presents the use of the sol-gel as a chemical conversion treatment to obtain TiO2 thin films on a stainless steel 316L.. The sol-gel was prepared with titanium butoxide as a precursor; adding niobium and vanadium salts as corrosion inhibitors. Once prepared, the sol-gel was aged for 24 hours. The substrate (stainless steel 316L) was cut in 5x2cm pieces to be ground and polished. Each piece was rinsed with water and finally with acetone. The method dip-coating was used to apply the sol-gel on the surface of the substrate. The dipping was done at three different speeds using a device previously designed and built in the laboratory. After the sol-gel is applied, the pieces are heat treated at different temperatures: 300°C, 500°C and 700°C. The films were characterized by X- Ray Fluorescence and Raman Spectroscopy. These techniques showed the presence of TiO2, with different structures depending on the thermal treatment temperature: amorphous, anatase and rutile. The corrosion behavior was studied in a 3% NaCl solution by Potentiodynamic Polarization Curves and Electrochemical Impedance Spectroscopy. The effect of the dipping speed and the actual TiO2 structures on the anticorrosive properties were reported.

Study of reinforcing steel corrosion behaviour treated by bluing and cerium chemical conversion treatments, part I: Conventional electrochemical techniques

In this work, a double-layered chemical conversion coating, which consists of a bluing layer followed by a cerium oxide layer, was applied to reinforcing steel (RS) to increase its corrosion resistance under field conditions. The corrosion behaviour of the blued reinforcing steel specimens (BRS) in 3% sodium chloride with and without the top layer of cerium oxide was assessed by open-circuit potential, linear polarisation resistance, potentiodynamic polarisation curves, and electrochemical impedance spectroscopy. Scanning electron microscopy coupled with energy-dispersive spectrometry, X-ray diffraction, and atomic force microscopy were used to characterise the blued and cerium conversion layers.The best electrochemical behaviour of RS was attained by the bluing sample sealed for 10 min in 0.001 M CeCl3 (B10 + cerium chemical conversion treatments). Under these conditions, the potential shifted in the noble direction from Ecorr to approximately 600–800 mV and the corrosion current density decreased by five orders of magnitude as compared to bare RS.

Study of the electrochemical behavior of a Ti6Al4V alloy modified by heat treatments and chemical conversion

The present study examines the effect of the thermal annealing treatment temperature (TT 700 and 800°C) and the effect of cerium as a chemical conversion treatment (CeCCT) on the Ti6Al4V alloy with the increase of the corrosion resistance of the base material. These coatings were evaluated using scanning electron microscopy (SEM) to determine the morphology and substrate coverage. Atomic force microscopy (AFM) was used to determine the level of roughness for each sample and technique by which the oxide was obtained. Additionally, curves polarization (CP) and electrochemical impedance spectroscopy (EIS) were conducted using an electrochemical characterization with Hank's saline (HK) as the electrolyte. The results show that with the thermal annealing treatment at 800°C for one hour, the TiO2 film is mainly obtained in the rutile phase and the film will have increased anticorrosive properties if it is sealed with cerium. Therefore, the use of these treatments in permanent prosthesis could be possible.