The anodization of titanium has been an excellent option for protecting and its alloys from corrosive environments such as acids chloride systems, by generating a homogenous oxide layer. objective the current investigation was to evaluate electrochemical corrosion behavior Ti-6Al-2Sn-4Zr-2Mo Ti-6Al-4V anodized in 1M H2SO4 H3PO4 solutions at density 2.5 × 10–3 A/cm2. anodization’s characterization achieved NaCl 3.5% wt. electrolytes. Scanning electron microscopy (SEM) employed determine...

Precipitation-hardening stainless steels, like AM 350 and Custom 450, are extensively utilized in various aerospace applications. The latter steel is for applications needing great strength corrosion resistance. In contrast, the former has a good resistance moderate strength. purpose of this study was to analyze transient frequencies electrochemical noise 450 steels that had been passivated 60 90 min at 25 49 °C using baths citric nitric acid then immersed solutions containing 1% sulfuric...

Precipitation-hardenable stainless steels (PHSSs) are widely used in various applications the aerospace industry. PHSSs parts that need to combine mechanical properties with corrosion resistance when aircrafts corrosive environments. This study aimed analyze kinetics of CUSTOM 450 and AM 350 were passivated acid baths for a period 120 min at temperatures 25 50 °C then immersed solutions containing 1 wt. % sulfuric (H2SO4) 5 sodium chloride (NaCl). The electrochemical technique was cyclic...

Titanium and its alloys have superior electrochemical properties compared to other alloy systems due the formation of a protective TiO2 film on metal surfaces. The ability generate oxide layer will depend upon type be used. aim this work was characterize corrosion behavior titanium Ti-CP2 Ti-6Al-2Sn-4Zr-2Mo, Ti-6Al-4V, Ti Beta-C. Samples were anodized in 1 M H2SO4 H3PO4 solutions with current density 0.025 A/cm2. Electrochemical tests carried out using three-electrode cell exposed two...

Ti and alloys are employed in demanding industries such as aerospace, automotive, biomedical, aeronautic, structural, naval, chemical, thanks to their resistance corrosion due the formation of TiO2 film on surface. Diverse research has established that different corrosive media could attack oxide layer. One way generate a stable, compact, continuous is through anodizing treatment. The efficiency anodization depends diverse factors microstructure, chemical composition alloys, pH electrolyte,...

Nowadays, different industries, such as the aerospace and biomedical prefer using Ti alloys due to their excellent anti-corrosion properties ability generate a TiO2 oxide layer; this induces use of anodization increase useful life components. The aim work is characterize electrochemical effect anodizing treatment on titanium (Ti CP2, Ti-6Al-2Sn-4Zr-2Mo, Ti-6Al-4V, Beta-C) in NaOH KOH at 1 M, applying current density 0.0025 A/cm2. techniques employed were noise (EN) impedance spectroscopy...

Titanium alloys have been used in aerospace, aeronautic, automotive, biomedical, structural, and other applications because titanium less density than materials like steel support higher stress Al-alloys. However, components made of are exposed to corrosive environments, the most common being industrial marine atmospheres. This research shows corrosion behavior three alloys, specifically Ti-CP2, Ti-6Al-2Sn-4Zr-2Mo, Ti-6Al-4V with α, near α + β phases. Alloys were two electrolytes a 3.5 wt. %...

Titanium alloys are used in different industries like biomedical, aerospace, aeronautic, chemical, and naval. Those have high requirements with few damage tolerances. Therefore, they necessary to use materials that present fatigue, mechanical, corrosion resistance. Although Ti-alloys material performance, exposed marine industrial environments. This research shows the behavior of three titanium alloys, specifically Ti CP2, Ti-6Al-2Sn-4Zr-2Mo, Ti-6Al-4V. Alloys were on two electrolytes a 3.5...

Custom 450 stainless steel and AM 350 are both precipitation hardening steels, which widely used in a variety of aerospace applications. The former exhibits very good corrosion resistance with moderate strength, whereas the latter is for applications requiring high strength along resistance. In this study, behavior CUSTOM steels passivated (a) citric acid (b) nitric solutions 50 75 min at 49 70 °C, subsequently exposed 5 wt. % NaCl 1 H2SO4 investigated. Two electrochemical techniques were...

Titanium alloys present superior electrochemical properties due to the generation of TiO2 passive layer. The ability generate an oxide layer depends on anodized alloy. This work mainly studies corrosion resistance Ti-6Al-2Sn-4Zr-2Mo and Ti-6Al-4V in NaOH KOH at 1 M 0.025 A/cm2 current density. techniques were performed a conventional three-electrode cell exposed electrolytes NaCl H2SO4. Based ASTM-G61 G199, cyclic potentiodynamic polarization (CPP) noise (EN) used. results indicated that...

The automotive industry employs structural steels with E-coats to reduce weight and increase the corrosion resistance of chassis, reducing CO2 emissions. Due their mechanical properties, part chassis is a composite advanced high-strength (AHSS). AHSSs are coated by conversion methods such as phosphate epoxy coating adherence resistance. main point this research characterize an AHSS complex-phase (CP) 780 in blank, E-coat organic using electrochemical noise, employing time-domain,...

Aluminum presents localized corrosion when exposed to marine and industrial environments. In this research, we study the pitting susceptibility of Al7075 coated by a SiO2 sol–gel coating as inhibitor employing electrochemical noise technique. The analysis methods were power spectral densities (PSDs) in impedance (Zn), complaints wavelet transform, recurrence plots, Hilbert–Huang due chaotic behavior EN signal. To perform EN, parameters employed 2048 data, 1 datum per second NaCl, H2SO4...

Stainless steels are used in the aeronautical industry for their corrosion resistance and good mechanical performance. The chemical treatment to improve is passivation, forming a compact, continuous, adherent chromium oxide film. This research aimed investigate effect of citric acid at different concentrations (citric acid; + oxalic acid, hydrogen peroxide, peroxide ethanol) on AM 350 stainless steel passivated 90 120 min 25 50 °C immersed 5% by weight sodium chloride (NaCl) solutions....

This research aimed to conduct a passive layer state study on martensitic and semi-austenitic precipitation hardening stainless steels (PHSS) passivated in citric acid nitric baths at 49 70 °C for 50 75 min subsequently exposed 5 wt.% NaCl 1 H2SO4 solutions. Corrosion behavior of the material was observed by using potentiodynamic polarization (PP) according ASTM G5-11 standard. The microstructural analysis performed optical microscopy scanning electron (SEM), while characterized X-ray...

Corrosion deterioration of materials is a major problem affecting economic, safety, and logistical issues, especially in the aeronautical sector. Detecting correct corrosion type metal alloys very important to know how mitigate problem. Electrochemical noise (EN) technique used characterize behavior different determine system. The objective this research by EN (Al, Ti, steels, superalloys) using analysis methods such as time domain (visual analysis, statistical), frequency (power spectral...

Aluminum and its alloys find widespread applications across diverse industries such as the automotive, construction, aeronautics industries. When these come into contact with ambient air, an Al2O3 thin oxide layer is naturally formed, typically measuring 2 to 4 nm exhibiting remarkable hardness protective qualities, rendering corrosion-resistant in specific atmospheric chemical environments. This study aimed characterize electrochemical behaviors of anodized AA2024 AA7075 within a complex...

Nickel or Cobalt-based superalloys represent an important class of engineering materials, finding widespread application in critical components within the gas turbine engines used for jet propulsion and electricity generation. This research aimed at frequency analysis transients electrochemical noise Waspaloy Ultimet superalloys, immersed 3.5 wt.% H2SO4 NaCl solutions two different temperatures, 25 60 °C. Localized corrosion behavior was assessed using technique (EN) according to ASTM-G199...

Corrosion of steel reinforcement is the major factor that limits durability and serviceability performance reinforced concrete structures. Impressed current cathodic protection (ICCP) a widely used method to protect reinforcements against corrosion. This research aimed study effect on with fly ash using electrochemical noise (EN). Two types mixtures were manufactured; 100% Ordinary Portland Cement (OCP) replacing 15% cement (OCPFA). The specimens under-designed protected conditions (−1000 ≤...

The emergence of superhydrophobicity-based antibacterial materials represents a promising approach to upholding surface cleanliness and hygiene, effectively preventing bacterial adhesion. This research describes the synthesis superhydrophobic coating with bacteriostatic properties using silica nanoparticles (SiO2 NPs) modified 1H,1H,2H,2H-Perfluorodecyltriethoxysilane (PFDTES). TEM, XRD, EDS, SEM, FTIR analyses were conducted study its morphology characterization. Additionally, was applied...

The automotive industry uses high-strength (HS), low-alloy (HSLA) steels and advanced (AHSSs) to manufacture front rear rails safety posts, as well the car body, suspension, chassis components of cars. These can be exposed corrosive environments, such in countries where de-icing salts are used. This research aims characterize corrosion behavior AHSSs based on electrochemical noise (EN) [dual-phase (DP) ferrite–bainite (FB)]. At room temperature, were immersed NaCl, CaCl2, MgCl2 solutions...

The aim of this work was to evaluate the corrosion behavior AA6061 and AlSi10Mg alloys produced by extruded additive manufacturing (selective laser melting, SLM). Alloys were immersed in two electrolytes H2O 3.5 wt. % NaCl solutions at room temperature their studied electrochemical noise technique (EN). Three different methods filtered EN signals, statistical analysis employed obtain Rn, localization index (LI), Kurtosis, skew, potential spectral density (PSD). Energy Dispersion Plots (EDP)...

For years, the aeronautical industry has employed different types of materials to satisfy its high-performance requirements. Fiber-metal laminates are used due their combination lighter weight and high mechanical properties reinforced metal carbon. We therefore made two composites laminate-metal laminate-metal-laminate carbon fiber-reinforced polymer aluminum with an ALCLAD layer. The samples were characterized by salt fog (0, 48, 96 h) at 5 wt% NaCl electrochemical impedance spectroscopy...