Corrosion Resistance Of Oxide Film Research Articles

Understanding the corrosion protection effect by surface oxide film to underlying Sn solder substrate under thermal exposure condition

Oxide film formed on Sn-based lead-free solder surface plays an important role in protecting the solder joints in electronic devices. However, corrosion resistance of oxide film varied significantly under the effect of waste heat generated by electronic devices. In this work, the physicochemical properties of oxide film on pure Sn and SnAg solders were disclosed through analysing the corresponding electrochemical impedance spectroscopy (EIS) data using measurement and power-law models. The resolved data from EIS were fully corresponded to X-ray photoelectron spectroscopy and transmission electron microscope observations, which highlight the EIS approaches in illustrating the oxide film properties on Sn-based solder.

Influence of Anodic Oxidation on the Organizational Structure and Corrosion Resistance of Oxide Film on AZ31B Magnesium Alloy

Magnesium alloys, notably AZ31B, hold promise for lightweight structural applications in the aerospace, automotive, and biomedical sectors due to their excellent strength-to-weight ratios. The broad adoption of these alloys, however, is hindered by their inherent susceptibility to corrosion, reducing durability and functional integrity in corrosive environments. This study explores anodic oxidation as a viable surface treatment to improve the corrosion resistance of the AZ31B magnesium alloy. Focusing on the impact of oxidation voltage on the oxide film’s structural and electrochemical properties, we aim to optimize these characteristics to enhance the alloy’s utility and lifespan significantly. Through detailed analysis of surface and cross-sectional morphologies, film thickness, phase composition, and corrosion resistance, we identify an optimal oxidation voltage of 17.5 V that notably improves the oxide film’s density and corrosion resistance. Through this research, we contribute to the ongoing efforts to overcome the corrosion vulnerability of magnesium alloys, thereby unlocking their full potential in contributing to more sustainable and efficient technological advancements.

Effects of zinc-aluminium injection on corrosion behaviour and semiconductor properties of carbon steel in the PHT system of PHWR.

Carbon steel is widely used as the piping of the primary heat transport system (PHT) in pressurized heavy water reactors (PHWR). Effects of zinc/aluminum treatment and simultaneous injection of zinc and aluminum on corrosion behavior and semiconductor properties of oxide films formed on carbon steels were characterized by the gravimetric method, potentiodynamic polarization scan, EIS, Mott–Schottky test, SEM, EDS mapping, XPS analysis and photocurrent response measurement. The results showed that all the metal cation ions treatment can improve the corrosion resistance of oxide films in varying degrees. 20 ppb Zn2+ had the greatest enhancement in corrosion resistance, followed by 20 ppb Zn2+ + 20 ppb Al3+. ZnFe2O4, FeAl2O4 and ZnAl2O4 were detected to be new spinel phases generated in oxide films. The oxide films on the surface of carbon steel all demonstrated n-type semiconductor properties. It was worth noting that the total content of manganese and zinc in the oxide film played an important role in the corrosion resistance of carbon steel.

Assessment of AA5005 aluminum alloy corrosion resistance by Direct Blue 15 inhibitor in sodium chloride medium

The effect of Direct Blue 15 dye (DB-15) on the corrosion of aluminum AA5005 in 3% NaCl solution was studied using gravimetric techniques. The results indicate that the DB-15 acts as an inhibitor in the NaCl environment by adsorption on the metal surface. The inhibition efficiency was found to increase with dye concentration and attained 90.8% at 400 ppm. The effect of temperature on the corrosion behavior of aluminum in 3% NaCl was studied in the range 298 K and 328 K. The inhibition performance was also tested by immersing aluminum in 3% NaCl solution using electrochemical methods; potentiodynamic polarization (PP) curves and electrochemical impedance spectroscopy (EIS). PP measurements showed that DB-15 can be considered as mixed-type inhibitor with predominant anodic action and with inhibition efficiencies that improve with concentration. Electrochemical impedance spectroscopy measurements reveal that the corrosion resistance of oxide film increases with dye inhibitor concentrations. The adsorption of the inhibitor on the AA5005 aluminum alloy surface obeyed the Langmuir adsorption isotherm. The values of inhibition efficiency calculated from weight loss, potentiodynamic polarization, and electrochemical impedance spectroscopy are in good agreement.

Optical spectroscopic and electrochemical characterization of oxide films on a ferritic stainless steel

AbstractColored oxide films that form on ferritic stainless steel in a high‐temperature, oxidizing environment and correspond to different chemical compositions can cause a deterioration of pitting resistance and corrosion performance. Herein, optical spectroscopic and electrochemical techniques have been used to reveal the relationship between color, chemical composition, and corrosion resistance of oxide films formed in the temperature range from 400°C to 800°C for 30 min and at 800°C for 10, 20, 30, and 60 min. The substrate with a thin and dense passivation film leads to a low pitting potential but high corrosion resistance. Oxide films of yellowish or brownish color formed below 600°C are mainly iron oxides, which correspond to low corrosion resistance. No passivation characteristics can be observed for polarization curves of oxide films formed at 500°C and 600°C. The color of oxide films varies from blue to dark gray with the increase of oxidation time at 800°C. Corrosion resistance changes with different proportions of Fe3O4, Cr2O3, and FeCr2O4. The gray oxide films formed at 800°C for 30 min exhibit the lowest pitting susceptibility and the highest corrosion resistance.

Effect of the Bluing Solution on Corrosion Resistance of the Oxide Film Prepared in Steel

The process of Quench-bluing treatment on low-carbon steel were introduced. The continuity and corrosion resistance of the blue oxide film that is treated by different types of bluing solution and bluing solution with different concentrations of NaOH were evaluated by drip experiment and electrochemical test .The results show that Quench-bluing process can make the corrosion resistance better when use the solution of 500g/L NaOH and 150g/LNaNO2 as Quench liquid and 15% NaOH in the solution can form the blue oxide film with the best corrosion resistance.

Characterization of the oxide films formed on low temperature sensitized AISI 321 stainless steel with different strain levels in elevated temperature borate buffer solution

The effect of strain and low temperature sensitization on corrosion resistance of AISI 321 stainless steel in elevated borate buffer solution was investigated. The study found that the AISI 321 stainless steel with 20% strain showed the lowest degree of sensitization due to the fact that sample with 20% strain had high dislocation density which promoted chromium diffusion and a small amount of α'-martensites. The results from electrochemical impedance spectroscopy indicated that sensitized sample with 20% strain showed the best corrosion resistance after immersion test at 290 °C. A good agreement was found between the electrochemical impedance spectroscopy and the degree of sensitization. The oxide film was composed of three layers according to the results of the XPS and Raman spectra. In addition, the outer part compositions of the oxide film were mainly γ-Fe2O3 and Fe-Cr spinel and iron hydroxide, while the inner and intermediate layers were mainly Fe-Cr spinel and the mixtures of the oxides of Fe, Cr, Ni. The ratio of hydroxide in oxide film increased due to large strain, especially for chromium hydroxide. Mott-Schottky analysis showed that more hydroxides induced more donor and acceptor concentrations in oxide film. More hydroxides reduced corrosion resistance of oxide film.

The effect of wettability on corrosion resistance of oxide films produced by SILAR method on magnesium, aluminum and copper substrates

Abstract The CuO, MgO and Al2O3 films were deposited on Cu, Mg and Al substrates by the Successive Ionic Layer Adsorption and Reaction (SILAR) method. While the MgO thin film showed hydrophilic behavior with contact angle of 75°, the Al2O3 film was hydrophobic with the contact angle of 117°. The best enhancement in terms of the wetting behavior was obtained from the copper oxide films. For these films, maximum static water contact angle was 164°. Results showed super-hydrophobic property and unique shape of form. Moreover, the superhydrophobic surface of CuO film exhibited higher corrosion resistance than MgO and Al2O3 films.

Oxidation behavior of 5A06 and 2A12 aluminum alloys in sulfuric-adipic acid and electrochemical property of anodic oxide film

Anodic films of 5A06 and 2A12 aluminum alloys were obtained in sulfuric-adipic acid. The influence of alloy phase on anodic oxidation behavior,and the structure and corrosion resistance of the oxide film were analyzed. Electrochemical results were completed by the polarization curve and electrochemical impedance spectroscopy( EIS),and microstructure characterization of the anodic film was carried out by field emission-scanning electronmicroscopy( FE-SEM). 2A12 aluminum alloy showed two current peaks during anodization process,which shown that the dissolution of copper phase would influence the process of anodic oxidation.The pores of 2A12 anodic oxide film are not neat and have serious connectivity. Enrichment of copper phase promotes the production of oxygen. With the same soaked time,the corrosion potential of anodic oxide film on5A06 is higher and corrosion current is lower than those of 2A12. The corrosion resistance of anodic oxide film on 5A06 is better. There properties all attributed to the higher porosity of Al-Cu alloy than that of Al-Mg alloy.

Corrosion Resistance by Sodium Metavanadate for AZ91D Magnesium Alloy

An oxide film was prepared on AZ91D magnesium alloy by anodizing in solution containing sodium metavanadate (NaVO3). The corrosion resistance of the substrate was investigated at a fixed current density 10 mA/cm2for 5 mins with different concentration of solution in the range of 0 – 1.0 g/l. The surface morphology, phase structure and corrosion resistance of oxide film were studied by optical microscope, scanning electron microscope (SEM) and energy dispersive spectrometry (EDS) and X-ray diffractometer (XRD), potentiodynamic polarization technique and corrosion test.

シリコン含浸型炭化ケイ素に形成された酸化皮膜の沸騰濃硫酸環境下における耐食性

シリコン含浸型炭化ケイ素に形成された酸化皮膜の沸騰濃硫酸環境下における耐食性