Polarization Method Research Articles

Study on the characteristics of initial shock waves generated by cylindrical charge for underwater explosion

In order to provide a theoretical basis for studying the shock wave propagation and evolution generated by cylindrical charge of near-field underwater explosion, the characteristics of initial shock waves generated by cylindrical charge are studied. First, a new theoretical model for initial shock waves is proposed by the polar curve method. Based on the theoretical model and the simulated results, the influences of incident angle, length-to-diameter ratio and type of charge on the initial shock waves are analysed. Then the experiments of underwater explosion load tests are carried out to verify the theoretical and simulation results. Finally some instructive conclusions are drawn: i) The two-dimensional theoretical model can calculate the initial underwater shock wave pressure and its direction of cylindrical charge through detonation velocity, detonation pressure, explosive density and incident angle, which is provides a theoretical basic for studying the shock wave propagation and evolution studies. By comparing the theoretical results with the numerical results verified by experiments, the maximum error is not more than 9.93%. ii) Increasing the incident angle α 0 will reduce the initial shock wave pressure of cylindrical charge and make its direction deflect towards the material interface. When the incident angle α 0 is in the range of 0 - 10°, increasing the incident angle makes the initial shock wave pressure decrease rapidly as a power function. With the increasing of the incident angle, the attenuation rate of the initial shock wave firstly decreases and then increases when the incident angle α 0 is in the range of 10 - 72°. This phenomenon explains the reason that the axial and radial initial shock wave pressures are much higher than those in other directions after the central initiation of cylindrical charge. iii) According to the geometric relationship, the length-to-diameter ratio of the charge will limit the range of the incident angle. The length-to-diameter ratio will affect the initial shock wave pressure at the same initiation time. The pressure decreases with the increase of the length-to-diameter ratio when the initial shock wave is formed on the cylindrical surface of the charge.

Application and Significance of the Wavelet–Fractal Method on the Data of the Induced Polarization Method in the Graphite Deposits of Datong, China

Wavelet transformation has been widely used in geophysical and geochemical exploration, and the fractal feature of wavelet coefficients has recently stood out from many wavelet threshold methods. We introduced the wavelet–fractal method to analyze the polarizability and resistivity of graphite deposits. Due to the unique nature of graphite-bearing gneiss, characterized by high polarizability and low resistivity, we concluded that the polarizability background mode is better suited to depict the morphology of the graphite-bearing formation, with the resistivity background mode serving as complementary information for verification. Symlets5 is regarded as the optimal mother wavelet to indicate the characteristics of graphite ore by means of comparison and analysis. The polarizability anomalies showed two different linear forms: the direction of the measuring line and the strike of the ore bodies. According to the data of drill holes on the profile, we inferred that the high values of the anomaly mode can be used to delineate the target area where the graphite is enriched. Combining the application of both modes, we used the wavelet–fractal method for the quantitative prediction and effective selection of a potential area with a high grade. The approach used in this current study can be extended to the prospecting of other graphite deposits or sedimentary–metamorphic deposits containing conductive minerals, where geochemical and geophysical data are available.

Preprocessing of passive‐source ocean‐bottom seismometer data in the Mariana subduction zone

AbstractThe data collected by ocean‐bottom seismometers are unique compared to that of land seismic stations and require preprocessing before use. In this study, we focus on preprocessing seismic data obtained from a passive‐source experiment in the Mariana subduction zone conducted by the Institute of Deep‐Sea Science and Engineering, Chinese Academy of Sciences from 2018 to 2019. We outline the steps involved in preprocessing the data, including time correction using the ocean background noise cross‐correlation function, tilt correction using a transfer function and orientation correction based on seismic wave polarization. Our results show that the maximum clock drifting was ∼4 s on two stations (K06 and K20), whereas the rest of the station waveforms have clock drifting of less than 2 s. Among stations, only the K06 station is tilted, and the tilt angle is 19.82°. We use the P‐wave and Rayleigh wave polarization methods to determine the orientation. Our results indicate that the error in the result obtained using the P‐wave polarization method is less than that of the Rayleigh wave polarization method. Additionally, we address the advantages and disadvantages of these preprocessing techniques. Our goal is to offer a comprehensive overview of the preprocessing process, to assist beginners in the field and to serve as a foundation for future research in passive‐source ocean‐bottom seismometers.

Resistivity and full‐decay IP inversion for imaging a coastal aquifer prone to saline intrusion: The Pontina Plain case study (Central Italy)

AbstractMany coastal areas are affected by groundwater salinization due to the unsustainable use of groundwater resources. For a cost‐effective quantitative assessment of groundwater resources, electrical resistivity (ER) tomography is often used as a standalone geophysical technique. In this paper, we present an application of the integration of direct‐current ER and full‐decay‐induced polarization (IP) method at the Pontina Plain (Central Italy). The case study is a coastal area in Central Italy prone to salinization due to both geological and anthropogenic factors. To achieve these goals, we inverted full‐decay time‐domain electrical data for Cole–Cole parameters. The resulting multi‐parameter model provides a first approximation prediction of the permeability, employing well‐established empirical relationships with the electrical parameters. We demonstrated that our approach: (i) can locate highly conductive zones directly related to saline intrusion inland using the resistivity as a fast proxy; (ii) can remove the ambiguity in the detection of clay/silt layers in the near‐surface; and (iii) permit a prediction of the permeability, employing full‐decay inversion of time‐domain electrical data. However, the extremely conductive environment prevents the use of IP data for the reconstruction of deep layers or detection of the salt wedge front. Therefore, this approach can be used for hydro‐geophysical screening and monitoring of salinization‐prone sites, where strong limitations to direct inspection exist due to external constraints (e.g., protected lands).

Efficiency of Fabricated Adsorptive Polysulfone Mixed Matrix Membrane for Acetic Acid Separation.

The ultrafiltration mixed matrix membrane (UF MMMs) process represents an applicable approach for the removal of diluted acetic acid at low concentrations, owing to the low pressures applied. The addition of efficient additives represents an approach to further improve membrane porosity and, subsequently, enhance acetic acid removal. This work demonstrates the incorporation of titanium dioxide (TiO2) and polyethylene glycol (PEG) as additives into polysulfone (PSf) polymer via the non-solvent-induced phase-inversion (NIPS) method to improve the performance of PSf MMMs performance. Eight PSf MMMs samples designated as M0 to M7, each with independent formulations, were prepared and investigated for their respective density, porosity, and degree of AA retention. Morphology analysis through scanning electron microscopy elucidated sample M7 (PSf/TiO2/PEG 6000) to have the highest density and porosity among all samples with concomitant highest AA retention at approximately 92.2%. The application of the concentration polarization method further supported this finding by the higher concentration of AA solute present on the surface of the membrane compared to that of AA feed for sample M7. Overall, this study successfully demonstrates the significance of TiO2 and PEG as high MW additives in improving PSf MMM performance.

Evidence of transverse wobbling motion in Eu151

Transverse wobbling was investigated in the Eu151 nucleus by populating the excited states using Nd148(Li7, 4n)Eu151 at a beam energy of 30 MeV. Three new interconnecting transitions have been placed between the two negative parity bands. The M1/E2 character of the interconnecting ΔI=1 transitions between the negative parity bands was extracted from the mixing ratios using the RDCO and linear polarization method. The spin and parity of the states of different bands have also been assigned. The dominant E2 character of the interlinking transitions between the yrast and first phonon wobbling band and the dominant M1 character between the yrast band and its signature partner band indicate the presence of transverse wobbling in the Eu151 nucleus. It is further demonstrated that the triaxial projected shell model approach describes the observed experimental properties.7 MoreReceived 21 December 2022Revised 22 January 2023Accepted 8 May 2023DOI:https://doi.org/10.1103/PhysRevC.107.054310©2023 American Physical SocietyPhysics Subject Headings (PhySH)Research AreasCollective levelsNuclear structure & decaysProperties150 ≤ A ≤ 189TechniquesSpectrometers & spectroscopic techniquesNuclear Physics

Surface Modification of Pure Mg for Enhanced Biocompatibility and Controlled Biodegradation: A Study on Graphene Oxide (GO)/Strontium Apatite (SrAp) Biocomposite Coatings

Magnesium alloys have excellent biodegradability but suffer from high corrosion rates and unfavorable biological responses. Thus, a surface modification strategy to regulate the corrosion rate and enhance biocompatibility is required. In this study, pure Mg substrate surfaces were coated with strontium apatite (SrAp) and graphene oxide (GO) biocomposite structures using the hydrothermal method to increase the biocompatibility of the surface of the Mg and obtain a moderate biodegradation rate. The effect of the GO concentration (0, 2, 4, and 6 wt.%) on the surface microstructure and its corrosion behavior were systematically studied. The corrosion behavior of the coatings was characterized in-vitro using the electrochemical polarization method in Hank’s solution. An EDS-connected SEM was used to examine the coatings’ surface properties. The functional groups of the coatings were identified using ATR-IR spectroscopy. To determine the degree of crystallization and examine the elemental distribution of the coatings, an XRD was used with a grazing incidence attachment. The XRD and SEM-EDS results showed that increasing the GO ratio in the SrAp-based coatings significantly enhanced the homogeneity and crystallinity, and the ATR-IR spectroscopy revealed that the SrAp/GO coatings were rich in functional groups, including hydroxyl, phosphate, and carbonate groups, that are known to promote bone formation and regeneration. The results of the electrochemical polarization tests demonstrated a considerable decrease in the corrosion rates for the samples with SrAp matrix and GO coatings. Additionally, the coatings containing GO exhibited higher polarization resistance (Rp) values, indicating their potential as a promising surface modification technique for biodegradable implants. These findings suggest that incorporating GO into the SrAp coatings could enhance their biocompatibility and provide a moderate biodegradation rate, which is desirable for biomedical applications.

Creating Ultrahigh and Long‐Persistent Triboelectric Charge Density on Weak Polar Polymer via Quenching Polarization

AbstractTo achieve high charge density for the triboelectric polymer is a crucial task for fabricating triboelectric nanogenerators (TENGs). This work has developed a quenching polarization (QP) method to create ultrahigh and long‐persistent triboelectric charge on the triboelectric polymer with weak dipole polarity. The Ethylene chlorotrifluoroethylene copolymer (ECTFE) film can reach a charge density of 391 µC m−2 in the vertical contact mode by using this QP treatment, which is 200% higher than the result achieved by the most widely used method of corona polarization. The mechanism of the improvement through QP on the triboelectric properties is studied on the basis of the polarization induced grain refinement and interfacial trapping. The QP‐treated ECTFE can maintain ultra‐high charge density for both solid‐solid and solid‐liquid TENG. More interestingly, the charge induced by QP treatment is so persistent that it produces a recoverable discharging phenomenon for solid‐liquid TENG, which has never been observed before. This QP method provides a different approach for fabricating high‐performance triboelectric materials, while the QP‐induced changes in crystallization and tribo‐charge density can help to complete the physical understanding of the electrification mechanism of triboelectric polymer.

Exploring the limits of metasurface polarization multiplexing capability based on deep learning.

Metasurfaces provide a new approach for planar optics and thus have realized multifunctional meta-devices with different multiplexing strategies, among which polarization multiplexing has received much attention due to its convenience. At present, a variety of design methods of polarization multiplexed metasurfaces have been developed based on different meta-atoms. However, as the number of polarization states increases, the response space of meta-atoms becomes more and more complex, and it is difficult for these methods to explore the limit of polarization multiplexing. Deep learning is one of the important routes to solve this problem because it can realize the effective exploration of huge data space. In this work, a design scheme for polarization multiplexed metasurfaces based on deep learning is proposed. The scheme uses a conditional variational autoencoder as an inverse network to generate structural designs and combines a forward network that can predict meta-atoms' responses to improve the accuracy of designs. The cross-shaped structure is used to establish a complicated response space containing different polarization state combinations of incident and outgoing light. The multiplexing effects of the combinations with different numbers of polarization states are tested by utilizing the proposed scheme to design nanoprinting and holographic images. The polarization multiplexing capability limit of four channels (a nanoprinting image and three holographic images) is determined. The proposed scheme lays the foundation for exploring the limits of metasurface polarization multiplexing capability.

Diazenyl derivatives as efficient corrosion inhibitors for mild steel in HCl medium: Gravimetric, electrochemical and computational approach

. In present investigation diazenyl derivatives, namely, (E)-4, 4(E)-4, 4′-(((4-(2-amino-6-phenyl-2H-1, 3-thiazin-4-yl) phenyl) diazenyl) methylene) bis (6-phenyl-6H-1, 3-thiazin 2amine) (ATPA) and (E) 1(4((bis (5-amino1, 3,4- thiadiazol-2-yl) methyl) diazenyl) phenyl) ethanone (ATPE) were synthesized and used as corrosion inhibitor for mild steel (MS) in 15 % HCl solution. Corrosion inhibition studies were performed by weight loss, electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization methods. Potentiodynamic polarization result demonstrates that ATPA and ATPE offered inhibition efficiency of 97.11 and 96.02 %, respectively at 200 ppm concentration and 303 K temperature. Calculated standard free energy of adsorption values were found in the range of −38.47 to −40.84 kJmol−1 for ATPA and −36.91 to −39.19 kJmol−1 for ATPE, suggesting the mixed type adsorption of ATPA and ATPE on MS surface. The adsorption of ATPA and ATPE on MS surface obeyed Langmuir adsorption isotherm. Morphological analysis performed on uninhibited and inhibited samples by field emission scanning electron microscopy (FESEM), energy-dispersive X-ray spectroscopy (EDX), atomic force microscopy(AFM)and X-ray photoelectron spectroscopy(XPS) techniques suggested the formation of protective layer of inhibitor molecules on MS surface. According to polarization results, both compounds behave as anodic inhibitors. Theoretical data of ATPA and ATPE obtained from Density functional theory (DFT), Monte Carlo simulation (MCS) and Molecular dynamic simulation (MDS) supports the experimental observations.

Development of pH-Sensitive UiO-66/Polyaniline Nanohybrids with Self-Healing Anticorrosive Performance in Epoxy Coatings

The present research focused on the corrosion protection behaviors of epoxy coatings filled with polyaniline (PANI) and its nanohybrid with a Zr-based metal–organic framework (MOF), i.e., UiO-66. Hybrid nanoparticles were synthesized at various weight percentages of UiO-66 in the nanohybrid, including 5, 25, and 50 wt % named H5, H25, and H50, respectively. The morphological features of the nanoparticles characterized with various techniques showed that the nanohybrids with higher UiO-66 content, i.e., H25 and H50, provided a core–shell microstructure with a porous core covered by the PANI outer shell. Analysis of the saline solution (3.5 wt % NaCl) containing the nanoparticles indicated the pH-sensitive release of organic compounds and Zr cations from UiO-66, which could act as active inhibitors against corrosion. The corrosion behavior of the mild steel plate immersed in a saline solution containing the extracts of the nanoparticles, investigated by the Tafel polarization method and electrochemical impedance spectroscopy (EIS), showed that the hybrid nanoparticles played strong active inhibition compared with neat PANI. Among the nanohybrids, H25 exhibited maximum inhibition performance with 56.7% inhibition after 24 h of immersion. Active (self-healing) corrosion behavior of scratched epoxy coatings containing 0.15 wt % nanoparticles was revealed that the epoxy coating with H25 and H50 exhibited 170 and 155% improvement (total resistance (Rt)) at optimal immersion times of 5 and 3 h, respectively. Field emission scanning electron microscopy (FE-SEM) observation of the scratched area after corrosion, confirmed by energy-dispersive X-ray spectroscopy (EDS) analysis, revealed the formation of inhibitor films in those areas, which increased the protectiveness of the coatings.

Synthesis and performance of polythiophene-iridium oxide composite as counter electrode in dye sensitized solar cell

Efficient electron transfer from the counter electrode (CE) to the redox couple electrolyte is the key process in the operation of dye-sensitized solar cells (DSSC). Polythiophene-Iridium oxide (PTh/IrO2) nano composite synthesized by reflux reaction method at different mass ratios (1:4, 1:2 and 1:1) has been explored as an effective electrocatalyst for the triiodide reduction in DSSC. The results of electrochemical impedance spectroscopy (EIS), bode plot studies and Tafel polarization method suggested that the composite synthesized at mass ratio 1:1 exhibited low charge transfer resistance (R ct), faster transport of electrons and excellent electrocatalytic activity. The PTh/IrO 2 composite synthesized at mass ratio 1:1 based DSSC exhibits a conversion efficiency of 3.01%, open-circuit voltage of 0.60 V and a short-circuit current density of 10.1 mA/cm 2. The facile synthesis procedure and attractive electrochemical properties benefit PTh/IrO 2composite to be used as a credible CE in DSSCs.

Sea Clutter Measurement Test and Amplitude Characteristics Analysis in the South China Sea Nearshore Area

To address the problem of sea clutter amplitude distribution characteristics varying with bandwidth, this paper obtains the raw data of clutter under different polarization methods of HH and VV in X and Ka bands based on the sea clutter measurement experiment carried out in June 2022 in the near-shore waters of South China Sea. For the data in X-band HH polarization mode, the goodness-of-fit test was conducted based on the classical models of Rayleigh, Weibull, log-normal and K distribution for the amplitude distribution characteristics of the sea clutter, and the variation of the estimated parameters of the distribution model with the bandwidth was analyzed. The test data show that: 1, with the increase of bandwidth sea clutter amplitude decreases; 2, with the increase of bandwidth Weibull distribution model parameters are decreasing trend, k distribution parameters are increasing trend; 3, the test conditions, the offshore sea clutter amplitude distribution is the optimal K distribution. The conclusions of this paper can provide a comparison and reference for the subsequent study on the characteristics of sea clutter distribution.

Development of a fluorescence screening assay for binding partners of the iron-sulfur mitochondrial protein mitoNEET

MitoNEET belongs to the CDGSH Iron-Sulfur Domain (CISD)-gene family of proteins and is a [2Fe-2S] cluster-containing protein found on the outer membrane of mitochondria. The specific functions of mitoNEET/CISD1 remain to be fully elucidated, but the protein is involved in regulating mitochondrial bioenergetics in several metabolic diseases. Unfortunately, drug discovery efforts targeting mitoNEET to improve metabolic disorders are hampered by the lack of ligand-binding assays for this mitochondrial protein. We have developed a protocol amenable for high-throughput screening (HTS) assay, by modifying an ATP fluorescence polarization method to facilitate drug discovery targeting mitoNEET. Based on our observation that adenosine triphosphate (ATP) interacts with mitoNEET, ATP-fluorescein was used during assay development. We established a novel binding assay suitable for both 96- or 384-well plate formats with tolerance for the presence of 2% v/v dimethyl sulfoxide (DMSO). We determined the IC50-values for a set of benzesulfonamide derivatives and found the novel assay reliably ranked the binding-affinities of compounds compared to radioactive binding assay with human recombinant mitoNEET. The developed assay platform is crucial in identifying novel chemical probes for metabolic diseases. It will accelerate drug discovery targeting mitoNEET and potentially other members of the CISD gene family.

Application of Crossed Polarizer Method in the Measurement of Differential Group Delay of Optical Fibers

In this paper, we report the use of crossed polarizer technique to measure the differential group delay (DGD) of few-mode optical fiber (FMF). The windowed Fourier transform (WFT) is applied in the analysis of beat length measurement in the spectral domain to obtain the dependence of DGD as a function of wavelength. The birefringence of polarization-maintaining fiber (PMF) and the DGD of FMF are measured by applying our method. We discuss the noise background, the width of DGD peaks, and the possible errors introduced in the optical path in the modified crossed polarizer technique.

A Polar Moving Base Alignment Based on Backtracking Scheme

In the polar region, the gravity vector and Earth’s rotation vector tend to be in the same direction, leading to a slower convergence speed and longer alignment time of the moving base alignment. When the alignment time is short, the alignment cannot converge, resulting in low azimuth accuracy. To address this issue, we propose a polar moving base alignment method based on a backtracking scheme. Notably, this work first derives a polar coarse alignment method with the inertial frame based on the transverse Earth model. On this basis, we designed a polar coarse alignment method based on a backtracking scheme and optimized the data storage scheme. Then, a backward navigation algorithm based on the transverse inertial navigation mechanical arrangement scheme was derived, and a polar fine alignment method based on a backtracking scheme was designed. Semi-physical simulation experiments showed that the alignment algorithm based on a backtracking scheme could converge in the 180 s with high alignment accuracy, which is 70% faster than the current polar moving base alignment method.

Experimental Study on Ratio Optimization of Similar Materials for Underground Mining of Shendong Coalfield: A Case Study of Shangwan Coal Mine

Physical simulation is one of the effective methods to study mining problems, but the selection and proportion of simulation materials are greatly affected by the regional environment. This paper is based on a multilevel orthogonal design test scheme using sand, lime, and gypsum as the materials in the Shangwan coal mine in the Shendong coalfield, with the sand to cement ratio, paste to ash ratio, and maintenance days as variables. The effect of the polar difference method on the strength and density of gypsum was used as a reference for physical simulation in the Shendong coalfield. The sensitivity analysis of each factor was carried out by the polar difference method, and the influencing factors on density were, in descending order, sand to mortar ratio, mortar to ash ratio, and the number of maintenance days; the influencing factors on strength were, in descending order, mortar to ash ratio, maintenance days, and sand to mortar ratio. The sand cement ratio was negatively correlated with strength and density, the paste to ash ratio was positively correlated with strength and density, and the number of maintenance days was positively correlated with strength and negatively correlated with density. The multivariate non-linear regression analysis of sand to cement ratio and paste to ash ratio identified similar material proportioning test equations for the Shendong coalfield, which can improve the accuracy of physical simulation and be used to guide physical simulation experiments in the Shendong coalfield.

Spectral induced polarization of rocks with electronically conductive inclusions: a semi-empirical capillary model

SUMMARY Induced polarization (IP) method is widely used in different applications including mining geology, hydrogeology, contaminant hydrology, geodynamics and geothermal research. For this reason, petrophysical investigations of IP parameters present an increased interest. Last decades IP behaviour of rocks and sediments containing metallic particles (MP) was extensively studied. Petrophysical investigations were performed mostly with synthetic granular models presented mixtures of sands and MP. In this paper, for the first time, we present IP data measured on a synthetic capillary model. The model made of Plexiglas contains a bundle of capillaries: some active (i.e. blocked by MP), others passive (open). In the experiments, we varied (i) the volumetric content of MP (ii) the water electrical resistivity, (iii) the model porosity and (iv) the MP resistance. We found that the chargeability primarily depends on the ratio of the active to total surface of the pore cross-sections. Consequently, when the model contains only one active pore, and no passive pores, the chargeability is equal to 100 per cent. This is the case even if the volumetric content of MP is very small. This behaviour of the capillary model is contrary to that of sand-MP mixture where the chargeability is approximately proportional to the volumetric MP content. We also found that the relaxation time of the capillary model depends on the bulk resistivity, the MP resistivity and the specific capacitance of the electrical double layer at the ‘MP–pore water’ interface. We explain the experimental data based on a new semi-empirical model. The model presents an extension of Pelton's model with explicit consideration of electrical and structural parameters of the capillaries.

Surface morphology studies and corrosion behaviour of plasma sprayed Cr3C2/8YSZ composite coating on SS316

Austenitic Stainless Steel (SS316) is a commonly used material in marine and offshore locations. The components’ surface in such environments degrades due to chloride and moisture exposure. Hence, adding a ceramic coating to the surface enhances its functionality. In the present work, Cr3C2 and 8YSZ powders are mixed in an equal ratio to deposit unique composite coated layers on the SS316 substrate by plasma spray coating method. The performance of the composite coating is also compared to that of uncoated, Cr3C2-coated, and 8YSZ-coated substrates. The surface morphology and cross-sectional microstructures of the coated SS316 substrate are examined using scanning electron microscope (SEM) images, and The presence of chemical elements in the coatings is determined using Energy Dispersive x-ray Analysis (EDAX) with elemental mapping. Further, the corrosion resistance of the substrate is evaluated using potentiodynamic polarisation and Electrochemical Impedance Spectroscopy (EIS) methods. The results show that the composite coating has a decreased porosity of 1.33% area and a higher microhardness of 880.02HV compared to bare and other coated surfaces. The corrosion analysis reveals that the composite coating has a decreased corrosion current density (Icorr) of 3.233 × 10–6 mA cm−2 and an enhanced charge transfer resistance of 2396.23 ohms.cm2 due to strong passivation and restricted electrolyte penetration into the coating. Further, the electrochemical corrosion study reveals that the composite coating exhibits the lowest corrosion rate of 0.00004306 mm / year.

Corrosion behaviour of SiC and Al2O3 reinforced Al 7075 hybrid aluminium matrix composites by weight loss and electrochemical methods

The corrosion study of Al 7075 hybrid metal matrix composites reinforced with equal weight percents (2.5, 5, 7.5, and 10) of silicon carbide and aluminium oxide is investigated in the present work by weight loss and electrochemical methods. In this study, composite specimens prepared by the squeeze casting technique were analyzed at room temperature to estimate the rate of corrosion in a 3.5% NaCl solution for various intervals using the weight loss method. As a consequence, a hybrid Al7075 composite reinforced with 10% SiC and 10% Al2O3 had a lower corrosion rate of 0.9997 mmpy than pure Al7075, which had a maximum corrosion rate of 3.4481 mmpy. The corrosion rate of hybrid composites is determined by the tafel polarization method and the electrochemical impedance spectroscopic method. These experiments showed that the corrosion rate of the hybrid metal matrix composite Al7075 + 10% SiC +10% Al2O3 was 0.630 mmpy less than that of the monolithic 7075 alloy. The corrosion morphology behaviour of the Al 7075 and their hybrid composite samples is observed by SEM. The SEM micrographs implied that SiC and Al2O3 reinforcements with the matrix alloy produced good interfacial and intermetallic bonding and hence decreased the corrosion rate.