Surface Of AZ31 Magnesium Alloy Research Articles

Corrosion resistance of a superhydrophobic polypropylene coating on magnesium alloy AZ31

Purpose To improve the corrosion resistance of magnesium alloys, the construction of protective coatings is necessary to extend the service life of Mg-based materials. Design/methodology/approach SiO2 nanoparticles modified by dodecyltrimethoxysilane (DTMS) were added to the PP and a superhydrophobic Mg(OH)2/PP-60mSiO2 composite coating was fabricated on the surface of AZ31 magnesium alloy via the hydrothermal method and subsequently the immersion treatment. Findings Hydrophilic SiO2 nanoparticles become hydrophobic after modified by DTMS, showing a higher dispersibility in xylene. By incorporating modified SiO2 nanoparticles into the composite PP coating, the hydrophobicity of the layer was enhanced, resulting in a contact angle of 166.3° and a sliding angle of 3.4°. It also improved the water repellency and durability of the coating. Furthermore, the intermediate layer of Mg(OH)2 significantly strengthened the bond between the PP layer and the substrate. The Mg(OH)2/PP-60mSiO2 composite coating significantly enhances the corrosion resistance of the magnesium alloy by effectively blocking the infiltration of the corrosion anions during corrosion. The corrosion current density of the Mg(OH)2/PP-60mSiO2 composite coating is approximately 8.23 × 10–9 A·cm-2, which can achieve a magnitude three times lower than its substrate, making it a promising surface modification for the Mg alloy. Originality/value The composite coating effectively and durably enhances the corrosion resistance of magnesium alloys.

Fe/Cu doped black ceramic coating on magnesium alloy by plasma electrolytic oxidation method based on first principles

The absorption of visible light by a solid material can correspond to its color. If all visible light is absorbed, the material is black, and the band width of the material defines the wave limit of visible light absorption. Based on this, the transition metal elements Fe and Cu were chosen to dope MgO, and the transition metal elements Fe or Cu were substituted to dope MgO using first-principles simulation. The doped elements' 3d and 4 s levels were introduced to shift the locations of MgO's valence and conduction bands, respectively, lowering the band gap width of MgO. The MgO ceramic coating may respond to light wave wavelength redshifting to 780 nm and entirely absorb visible light; The black MgO ceramic coating was prepared on the surface of AZ31 magnesium alloy utilizing Fe salt and Cu salt as plasma electrolytic oxidation (PEO) electrolyte additions, and the visible light absorption rates were 94.2 % and 94.1 %, respectively. The test findings show that the band gap of the MgO ceramic coating has been lowered from 4.97 eV to 1.58 eV and 1.60 eV, respectively, which is the primary reason for the achievement of strong absorption in all visible light bands. The first principle calculation of the influence of doping elements on the band gap of MgO ceramic coating can serve as a theoretical guidance for selecting coloring elements for the fabrication of black ceramic coating.

Study of the wear resistance of composite coatings modified with h-BN particles on AZ31 magnesium alloy

A low wear resistance is a significant disadvantage of magnesium-based alloys widely used in industry. The results of plasma electrolytic oxidation (PEO) carried out in an aqueous-alkaline phosphate electrolyte with the addition of hexagonal boron nitride (h-BN) powder to obtain coatings with greater wear resistance on the surface of AZ31 magnesium alloy are presented. The PEO method is one of the most promising for surface treatment of magnesium alloys, since oxidation is carried out in alkaline aluminate, silicate or phosphate electrolytes with various functional additives. The addition of nanocrystalline hexagonal h-BN powder in the form of a suspension into the electrolyte volume does not affect the electrical parameters of PEO, and h-BN particles are incorporated into the structure of the formed composite coating, increasing the wear resistance. It is shown that the resulting coatings have a relief typical of PEO with developed morphology and porosity, which change depending on the oxidation time. In this case, the incorporation of h-BN particles into the coating occurs by an inert mechanism, since they do not undergo chemical transformations with the formation of new phases. Composite coatings obtained on the surface of the AZ31 magnesium alloy by the PEO method consist of crystalline phases of MgO and Mg3(PO4)2, regardless of the addition of h-BN particles to the electrolyte. The wear resistance of coatings is 6 – 8 times higher compared to the untreated alloy. The results obtained can be used to produce PEO coatings with increased wear resistance and use them in various sectors of the economy.

Microstructural, mechanical and corrosion characterization of (C-HA)SiCnws coating on AZ31 magnesium alloy surface

A composite coating was developed to address the issues of low binding force and poor wear resistance of the hydroxyapatite coating on the surface of magnesium alloy. The composite coating, known as (C-HA)SiCnws coating, was prepared on the surface of AZ31 magnesium alloy using the carbonation-oxidation method of phenolic resin and electrophoretic deposition. The (C-HA)SiCnws coating is composed of a carbon coating as the middle layer, a hydroxyapatite coating as the surface layer, and SiC nanowires that connect the carbon layer and the HA coating. The morphology and infrared spectrum of the coating were characterized, and tests were conducted to evaluate the adhesion, wear performance, electrochemical properties, and corrosion resistance of the coating. The results demonstrate that the (C-HA)SiCnws coating is uniform and flat. The adhesion of the coating, as determined by tensile, is 3.51 ± 0.54 MPa, which is 88 % higher than that of the pure HA coating. Furthermore, the wear performance of the (C-HA)SiCnws coating is excellent, with a wear rate of only 0.96 × 10−3 mm3/(N·m), representing a reduction of 68.2 %. Additionally, the (C-HA)SiCnws coating demonstrates a favorable corrosion protection effect in both electrochemical polarization and corrosion tests. Overall, the prepared (C-HA)SiCnws coating exhibits significant enhancements in terms of adhesion, wear resistance, and corrosion resistance.

Improving anti-corrosion properties AZ31 Mg alloy corrosion behavior in a simulated body fluid using plasma electrolytic oxidation coating containing hydroxyapatite nanoparticles

Orthopaedic implants often make use of magnesium and its alloys. These alloys are more mechanically compatible with bone tissue than other alloys, such as titanium, cobalt, and nickel, but a loss of implant mechanical strength can occur due to their low corrosion resistance. The plasma electrolytic oxidation (PEO) method was used to modify the surface of AZ31 magnesium alloy in this study. The effects of varying concentrations of hydroxyapatite (HA) nanoparticles (1, 3, and 5 g/l) on the morphology and corrosion characteristics of coatings were examined using phosphate-based electrolytes. The elemental composition was determined using Energy dispersive spectroscopy (EDS), elemental map analysis (MAP) and phase X-ray diffraction analysis (XRD). Field emission-SEM was employed to investigate the surface morphology and cross-section of the coatings. The corrosion characteristics of all samples were evaluated by electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PDP) in Ringer’s solution. The sample with 3 g/l HA showed the best anti-corrosion performance, as it had the smallest average pore size (8.7 µm), the thickest coating (22.5 µm) and the lowest corrosion current density (0.034 µA/cm2) among all the samples tested.

In-situ preparation of (Ti,Al) codoped blue PEO ceramic coating on magnesium alloy and chromogenic mechanism

In this paper, the blue ceramic coating was prepared in situ on the surface of AZ31 magnesium alloy using Ti and Al composite salt as electrolyte by PEO technology. The results show that the light wave response range of the prepared ceramic coating is all in 430–470 nm with different n(Ti)/n(Al) atomic percentage in the electrolyte, but the blue color saturation of the ceramic coating increases with the increase of n(Ti)/n(Al) ratio. XRD and XPS analysis show that Ti exists in the form of Ti4+ and Ti3+, Al exists in the form of Al2O3, and a small amount of Ti3+ ions occupy the Al3+ lattice in the form of replacement solution, forming (Al2-xTix)O3 solid solution. This is the chromogenic mechanism of PEO-MgO ceramic coating changing from off-white to blue. Finally, due to the PEO plasma discharge generated on the surface of magnesium matrix in the micron level spot melting pool, the formation of the blue material of Al2O3 doped with Ti and the oxidation and sintering of magnesium matrix at high temperature synchronously, thus achieving in situ color ceramic treatment on the surface of magnesium alloy with low melting point.

Optimization of the PEO process for in-situ synthesis of SiO2 and hydroxyapatite on Mg alloy and assessment of biodegradation and bioactivity

In the current study, a MgO-based bioactive coating consisting of silicon dioxide (SiO2) and hydroxyapatite (HA) was fabricated on the surface of AZ31 magnesium alloy through the plasma electrolytic oxidation (PEO) method. To achieve the goal, the process conditions were optimized in an electrolyte containing 5 g/L Na3PO4.12H2O, 15 g/L Na2SiO3.9H2O, and 10 g/L C3H7O6CaP with a pH of 12.5 and an electrical conductivity of 30 mS.cm−1. Thereafter, silicon dioxide and hydroxyapatite were simultaneously synthesized in-situ over the PEO process for 10min at an operating voltage of 370 V. The percentage of surficial open porosity of the relevant PEO layer was estimated to be approximately 10.30 % using the ImageJ software. Furthermore, in-vitro corrosion and bioactivity assessments of PEO layer were conducted in the simulated body fluid (SBF) at 37 °C with immersion intervals of up to 10 days. The results of electrochemical impedance spectroscopy (EIS) indicated that the PEO coating containing both SiO2 and HA maintained its protective performance against corrosion over the entire 7 days of immersion in the SBF, whereas the corrosion resistance of the PEO layer with only the synthesized SiO2 experienced a significant decline after 3 days of immersion. Assessment of in-vitro bioactivity over 10 days of immersion in the SBF revealed that the sample with synthesized SiO2 and hydroxyapatite in its PEO layer exhibited a higher potential for hydroxyapatite deposition on the surface compared to SiO2-containing PEO coating.

Effect of SiC nanowires on adhesion and wear resistance of hydroxyapatite coating on AZ31 magnesium alloy

Hydroxyapatite (HA) coatings doped with different contents of SiC nanowire (SiCnws) were prepared on the surface of AZ31 magnesium alloy by electrophoretic deposition to solve the problems of low adhesion and poor wear resistance of pure HA coatings. Performance tests were conducted on the coating, including corrosion resistance, adhesion and wear performance. The results showed that the prepared coating was intact. The adhesion and wear resistance of the coating were significantly improved when the doping amount of SiCnws was 3%. Among them, the adhesion increased by 37.06% and the scratch depth decreased by 86.67%. At the same time, the corrosion resistance of the coating still maintained a high level. It showed that the performance of doping 3% SiCnws modified coating was balanced and excellent in all aspects.

Effect of process conditions for the preparation of a manganese-based coating on the surface of AZ31 magnesium alloy

Abstract Manganese-based coatings on AZ31 magnesium alloy with Mg(OH)2 interlayer were prepared by hydrothermal reaction under different process conditions (temperature, time, and concentration). The harsh reaction conditions provided coatings with defects. These defects enabled the corrosive environment penetrated to the magnesium alloy which impaired the corrosion properties of AZ31 alloy. Optimal conditions included a temperature of 120 °C, 0.25 M MnCl2, and a reaction time of 1 h. The prepared coating was mainly composed of Mn3O4, which consisted of nanosized crystals of polyhedral shape. Potentiodynamic polarization measurements showed that the coating had very good corrosion resistance in 0.15 M NaCl. Future work will focus on the potential use of the manganese-based coating in biomedical applications.

Study on Corrosion Resistance of LDH/Micro-Arc Oxidation Composite Superhydrophobic Coatings on AZ31 Magnesium Alloy

Because of some defects such as holes and cracks, the corrosion resistance of micro-arc oxidation coating needs to be improved by surface modification. In this paper, LDH/MAO film with a micro-/nano-structure is constructed on the surface of AZ31 magnesium alloy by controlling the composition and concentration of the hydrothermal solution. The superhydrophobic surface is successfully constructed by coating an OTES modifier on the surface of LDH/MAO film by the spin-coating method. The surface morphologies, contact angles, and corrosion resistance of composite coatings are tested. The results show that the OTES-LDH/MAO composite coatings of magnesium alloy can seal the defects in the MAO film well to achieve a superhydrophobic effect and better corrosion resistance. Compared with a MgO ceramic film, the water contact angle of OTES-LDH/MAO composite coatings is increased from 38° to 155°; the corrosion potential increases by 0.7 V, the corrosion current density and polarization resistance decreases and increases by four orders of magnitude, respectively; and the corrosion resistance becomes much higher than that of MAO film.

Development of mechanically robust and anticorrosion slippery PEO coating with metal–organic framework (MOF) of magnesium alloy

A novel anticorrosion and mechanically robust coating system was discovered via plasma electrolytic oxidation (PEO), in-situ MOFs growth strategy, and lubricant-infusion to produce slippery surface of AZ31 magnesium alloy. The PEO coating acts as a transition layer and provides a moderate corrosion barrier to Mg alloy. The homogenous and uniform ZIF-8 film on the PEO coating surface was successfully constructed by a practical and simple in-situ method. The incorporation of ZIF-8 particles plays a vital role to strengthen the corrosion resistance of PEO coating while increasing superhydrophobicity. Furthermore, the ZIF-8 film provides the anchoring site for storing infused lubricants to create a slippery surface. The prepared PEO-MOF-SLIPS showed six orders of magnitude lower icorr value than bare Mg alloy, indicating substantially improved corrosion resistance with an effective barrier performance. In addition, PEO-MOF-SLIPS demonstrates superior corrosion potential of −0.21 V/Ag/AgCl, after 2 days of immersion in 3.5 wt.% NaCl solution. The potentiodynamic polarization test (PDS) results proved that the slippery surface has superior water-repellence to other coatings, indicating higher endurance of SLIPS in 3.5 wt.% NaCl solution. Moreover, the PEO-MOF-SLIPS maintained its hydrophobicity for a longer time in 3.5 wt.% NaCl solution compared to PEO-MOF-SHS. EIS test results also proved that the PEO-MOF-SLIPS has a better resistance than that of PEO-MOF-SHS in prolonged immersion in a corrosive solution. According to the abrasion test, the PEO-MOF-SHS maintained its superhydrophobicity up to 100 cm under 100 g load and 80 cm under 200 g load. On the other hand, the PEO-MOF-SLIPS maintained its contact angle stable under both abrasion loadings. The as-prepared slippery surface showed durable water-repellent against the corrosive solution and higher mechanical robustness. The results demonstrate that the MOFs modified PEO coatings system provides a new pathway to the construction of the slippery surface of Mg alloy. It also proves that water-stable MOFs are efficient corrosion-resistant materials and can be used for various anticorrosion applications.

Improved corrosion resistance and biocompatibility of AZ31 alloy by acid pickling pretreatment and (H+) hydroxyapatite/chitosan composite coating

As a new generation of biodegradable hard tissue repair implants, the excessive corrosion rate in a liquid environment and the potential cytotoxicity of magnesium and its alloys have limited their further clinical applications to some extent. Because of this, in this study, a network-like porous structural surface with relatively uniform pore size was designed and prepared on the surface of AZ31 magnesium alloy by acid etching treatment, and the HAp prepared on this surface exhibited the advantage of high interfacial bonding strength, and the (H+)HAp /CS composite coating was prepared by using biocompatible CS as the sealing layer of the HAp coating pores, and the acid etching was investigated by electrochemical tests. The corrosion resistance of HAp prepared under acid-etching conditions and HAp prepared on AZ31 surface without acid-pickling treatment were investigated by electrochemical tests, while the composite coatings were characterized by X-ray diffraction (XRD), Fourier transforms infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) and EDS, and further tests such as electrochemical experiments, hydrogen precipitation experiments and cytocompatibility assessment concluded that the composite coating has good corrosion resistance, can effectively reduce the degradation rate of magnesium alloy, low magnesium ion precipitation concentration in the cell culture process has less effect on cell growth, and the coating can promote the attachment and proliferation of BMSCs osteoblasts, showing excellent cytocompatibility. Therefore, this study provides a new idea for the design of AZ31 surface morphology and the improvement of corrosion resistance and biocompatibility of AZ31 magnesium alloy, which is beneficial to promote the further development of AZ31 magnesium alloy as a bone repair material.

Preparation and characterization of Y-doped microarc oxidation coating on AZ31 magnesium alloys.

The rapid degradation characteristics of magnesium alloys limit its application in the field of orthopedic fracture fixation and cardiovascular stents. This study aimed to improve the corrosion resistance and biocompatibility of AZ31 magnesium alloys and prepare degradable implant materials. Micro-arc oxidation (MAO) was used to change the concentration of yttrium acetate in the electrolyte to prepare coatings with different yttrium content on the surface of AZ31 magnesium alloy. Through characterization, it is proved that the yttrium in the coating mainly exists in the form of Y3+. The polarization potential experiment shows that the micro-arc oxidation coating significantly improves the corrosion resistance of magnesium alloys. With the increase of yttrium acetate concentration in the electrolyte, the corrosion resistance of the coating first increases and then weakens. When the concentration is 0.0035mol/L, the coating has the highest corrosion resistance. The results of CCK-8 cytotoxicity experiment and cell morphology observation also proved that the cell viability in each group was greater than 140%, and the yttrium-doped coating on the surface of AZ31 magnesium alloy has no cytotoxicity, can promote cell growth, and has good biocompatibility.

The growth and corrosion mechanism of Zn-based coating on AZ31 magnesium alloys by novel hot-dip process

A Zn-based coating with excellent corrosion resistance was prepared on the surface of AZ31 magnesium alloy by novel hot-dip process. The microstructure, growth process and corrosion mechanism of coatings were investigated. The results show that good metallurgical bonding and integrated multi-layer phase structure were observed in coatings with sufficient immersion time. This multi-layer phase structure is divided roughly into an alloy layer consisting of Zn + Mg2Zn11 + MgZn2 phases and a diffusion layer consisting of MgZn + Mg7Zn3 phase, which is mainly attributed to the diffusion reaction of Zn and Mg atoms and the subsequent solidification. Furthermore, the corrosion resistance of coated AZ31 is dramatically improved, the low frequency value of the coated AZ31 up to 3541 Ω cm2, more than 90 times higher than bare AZ31 which is 38.1 Ω cm2, the icorr of 4 s coating is 1.948 × 10−5 A cm−2, reduced to 6.6% of bare AZ31 which is 2.895 × 10−4 A cm−2. The outstanding corrosion performance is mainly due to an effective barrier to Mg matrix by the dense multi-layer structure and the compact corrosion products.

Microstructure and Performance of Al-Coating on AZ31 Prepared by Pack-Cementation with Different Heating Methods

In this study, Al-containing coatings were prepared on the surface of AZ31 magnesium alloy by pack-cementation through box-type furnace heating (BFH) and induction heating (IH) methods. Phases, microstructure, composition, and performance were characterized by X-ray diffraction technique (XRD), secondary electron imaging (SEI), backscattered electron imaging (BSEI), and energy dispersive spectroscopy (EDS), the Vickers hardness test and potentiodynamic polarisation test, respectively. The results show that the heating method has a significant impact on the phases, microstructure, thickness, and performance of the coatings. Both aluminized layers are relatively flat and dense, and no obvious second phase is observed. The thickness of the aluminized layer of the IH sample is much larger than that of the BFH sample because the diffusion rate of IH is greater than that of BFH. Both aluminized layers are composed of an outermost layer of β-Mg2Al3 and an inner layer of γ-Mg17Al12 near the side of the substrate. The evolution of different heating methods is discussed. The microhardness and corrosion behavior of the aluminized coatings were also investigated and discussed. The results indicate that the hardness and corrosion resistance of the IH diffusion sample is better than that of the BFH, and this is related to the content of the intermetallic compound phase.

Anticorrosion behaviour and tribological properties of AZ31 magnesium alloy coated with Nb2O5/Nb2O5-Mg/Mg layer by magnetron sputtering.

Magnesium alloys are attracting increasing attention for the fabrication of temporary implants because of their superior biodegradability and biocompatibility. However, their high degradation rate under physiological conditions limits their clinical applications. In this work, a Nb2O5/Nb2O5-Mg/Mg multilayer coating was prepared on the surface of AZ31 magnesium alloy by magnetron sputtering in order to improve its corrosion resistance. The microstructure and performance of the layers were studied by SEM, AFM, EDS, and XPS, and a scratch tester, nanoindenter, friction tester, and electrochemical workstation, using Nb2O5 monolayer coating as a control. The results show that these two coatings significantly improved the mechanical, tribological, and anticorrosion performance of AZ31 magnesium alloy. Compared with a Nb2O5 monolayer coating, the multilayer coating exhibits an increased adhesion by about 10.6 times, and a decreased wear rate and corrosion current density by one order of magnitude, meaning higher damage resistance. This study provides a feasible strategy for enhancing the properties of ceramic layers on magnesium alloys for medical applications.

Formation of a phosphoric acid compound film on an AZ31 magnesium alloy surface using cavitation bubbles

Cavitation processing with chemicals was used to improve the corrosion resistance of an AZ31 magnesium alloy surface. This technique improves corrosion resistance by the formation of a phosphoric acid compound film on the surface of the Mg alloy. However, the processing conditions affect the state of the film; therefore, the effect of the distance from the nozzle to the specimen surface (stand-off distance) on the cavitation state was investigated. This technique employs phosphoric acid and water for processing; therefore, immersion tests were performed with various aqueous concentrations of phosphoric acid to evaluate corrosion resistance. Cavitation processing employs water jet peening (WJP) and multifunction cavitation (MFC). The stand-off distance at which the phosphoric acid-based film was easily formed on the Mg alloy surface was specified for each processing condition. In addition to the formation of a phosphoric acid compound film, the hardness and compressive residual stress at the surface were improved after each process. A film was formed on the surface during the immersion test; however, the thickness of the film was negligible. These results confirmed that cavitation processing is effective for the formation of a phosphoric acid compound film on Mg alloy surfaces.

Development and assessment of a multifunctional chitosan-based coating applied on AZ31 magnesium alloy: Corrosion resistance and antibacterial performance against Klebsiella Pneumoniae

This work presents a simple method to functionalise the surface of AZ31 magnesium alloy by applying a duplex MgF 2 /chitosan coating, which improves its corrosion resistance and provides it with some antibacterial performance. First, the effect of three chitosan solutions with different concentrations on the growth of the bacteria Klebsiella pneumoniae in nutritive medium (TSB) was evaluated by absorbance kinetics experiments, where the chitosan solution at 2% (m/V) was selected for the coating preparation. Before coating application, the AZ31 substrate was pretreated with hydrofluoric acid for 48 hours in order to form a MgF 2 conversion layer. Subsequently, the coating was applied to the pretreated substrate through the dry-casting method. Samples of the alloy in each surface condition (bare, pretreated, and pretreated + coated with chitosan) were exposed to simulated body fluid (SBF) for 21 days at 37 °C, with the solution renewed every 24 hours and the wastes stored. The surfaces were characterised by SEM-EDS, and XPS after the immersion tests, whereas the stored solutions were employed to measure the change in the Mg-ions concentration. Electrochemical impedance spectroscopy and potentiodynamic polarisation were performed in each surface condition to compare their corrosion resistance in SBF. The antibacterial activity of the functionalised surfaces was evaluated by the plate counting method and compared with bare samples. All results were correlated and demonstrate that the modified surface of AZ31 achieved a higher corrosion resistance when it was exposed to SBF, as well as a reduction of the bacterial growth during in vitro tests.

In Vivo Corrosion Behavior of Biodegradable Magnesium Alloy by MAF Treatment.

Coating treatment plays an irreplaceable role in propelling the clinical application of magnesium alloys. This experiment was designed in order to observe the anticorrosion behavior of magnesium fluoride coating in rats. The MgF2 layer was prepared on the surface of AZ31 magnesium alloy in saturated NH4HF2 solution by microarc fluorination (MAF) at 190 V. The cross-sectional SEM, EDS, and XRD analysis indicated that the alloy surface was covered with MgF2. Meanwhile, SEM observation was used to compare the magnesium alloy samples before and after treatment, and it was found that the samples after coating were flatter and smoother. Two sets of experiments were carried out with the subjects, 6-week-old male rats. So that the untreated AZ31 samples and the microarc fluorinated AZ31 samples could be buried under the muscle layer individually. The volume changes and surface morphology of the corroded samples were monitored dynamically using micro-CT over a 16-week period in vivo. Comparison of results between the two sets of samples presented that the corrosion of the microarc fluoridated samples was much slower than that of the untreated ones. The MAF coating was shown to be effective in controlling the corrosion rate and progression of the magnesium alloy.

Preparation of TiO2 bionic surperhydrophobic surface on AZ31 and it’s anti-corrosion properties

Superhydrophobic surface containing TiO2 was prepared on the surface of AZ31 magnesium alloy by two-step method. The morphology and composition of the film were characterized by SEM, XRD and FT-IR. The physical and chemical stability of the film was investigated by friction and wear test and contact angle test under different conditions. In addition, self-cleaning performance and corrosion resistance of the film were studied. The results showed that the superhydrophobic surfaces have good resistance to ultraviolet light, acidic and alkaline liquids, which prove that good mechanical stability and chemical stability.