1M HCl Research Articles

Synthesis, characterization and corrosion inhibition potential of oxadiazole derivatives for mild steel in 1M HCl: Electrochemical and computational studies

Though, there is an availability of good collection of synthesized structures that are applied to combat corrosion, still a continued challenge of the problem provokes the modern corrosion scientists towards deeper insights of the research field through synthesizing more and more interesting moieties and their applied capabilities against corrosion. An anticorrosive application of synthesized 5-(phenoxy methyl)-1,3,4-oxadiazole-2(3H)-thione(PMOT) and 5-benzyl-1,3,4-oxadiazole-2(3H)-thione(BOT) which are economically, safely characterized and biologically active compounds and were analyzed for mild steel (MS) through weight loss, EIS and potentiodynamic polarization measurements. SEM-EDX based methods to notice morphological changes, DFT and MD calculations were employed as supporting tools. Maximal inhibition was found to be 88.93 % for PMOT and 85.99 % for BOT at 300 ppm and 298 K. EIS findings revealed that charge transfer resistance enhanced for concentration increment and polarization plots exhibited that the molecules performed mixed type behavior with Langmuir adsorption model fit. An altered morphology of sheets within the two structures proved protect-ability. All results were in nice agreement for oxadiazoles and the moieties acted as good corrosion managing compounds in 1.0 M HCl solution.

Quantum and dynamic investigations of Complex iron- alkaloid-extract Cytisine derivatives of Retama monosperma (L.) Boiss. Seeds as eco-friendly inhibitors for Mild steel corrosion in 1M HCl

• The adsorption of Cytisine derivatives on the iron surface was modeled using DFT calculations as well as the dynamic Monte Carlo simulations. • DFT calculations were used to study the interaction of these inhibitors with iron Fe n (n=1-5). • MC and MD simulations were adopted to simulate the adsorption of Cytisine derivatives on the iron Fe (111) surface in vacuum as well as in acidic solution. • The radial distribution function (RDF), mean square displacement (MSD) and fractional free volume (FFV) were also studied using MD simulation. In this study, the adsorption of Cytisine derivatives as an eco-friendly inhibitor for mild steel corrosion [ 1 , 2 ] on the iron surface was modeled using density functional theory (DFT) calculations and the Monte Carlo (MC) as well as Molecular dynamics (MD) simulations to elucidate the interactions involved. Firstly, the interaction of these inhibitors with iron clusters Fe n (n=1-5) was studied by DFT as a representative example of a corrosion inhibition process. Moreover, structures, binding energies, partial atomic charge NBO and natural bond orbital analysis of the resulting complexes support the existence of considerable binding between these inhibitors and Fe n (n=1-5) clusters. Then, the dynamic Monte Carlo (MC) simulation was also adopted to simulate the adsorption of Cytisine derivatives on the iron Fe (111) surface in vacuum as well as in acidic solution containing 491 H 2 O, 4 hydronium ion H 3 O + and 5 chlorine ion Cl − . Besides, to advance the understanding of interactions between these molecules and iron surface, the radial distribution function (RDF), mean square displacement (MSD) and fractional free volume (FFV) were also studied in this paper. Our results of both the Fe n (n=1-4) clusters and the Fe (111) surface made it possible to show noticeable competitiveness between the three protonated inhibitors with a slight superiority for the n-CytN9H+ molecule. Furthermore, based on the diffusion coefficient we found that the three protonated inhibitors have a good capacity to slow down the movement of corrosive particles and consequently to inhibit the metallic substrate against corrosive electrolyte.

Corrosion inhibition and statistical data of low carbon steel in HCl media by admixed organic compounds

Corrosion inhibition of carbon steels with organic compounds exhibiting effective corrosion inhibition is an on-going research. The corrosion inhibition of low carbon steel in 1M HCl solution by the combined admixture of vanillin and benzonitrile (VBN), and salvia officinalis with lavendulan officinalis (SLV) was studied by weight loss method. Results obtained show that VBN and SLV performed effectively with maximum inhibition efficiency 91.03% at 1.5% VBN concentration and 97.89% at 5% SLV concentration. The inhibition efficiency of VBN increased with concentration but decreased with exposure time compared to the values obtained for SLV which showed non-dependence on concentration and exposure time after 1% SLV concentration. Correlation plots of inhibition efficiency versus inhibitor concentration show VBN to be more concentration dependent in performance. Calculated data for standard deviation shows the degree of variation from mean values for both compounds is significant at low inhibitor concentration due to time dependence action. Statistical analysis through ANOVA shows inhibitor concentration overwhelmingly influences the inhibition performance of the despite even though exposure time is statistically relevant to minimal degree.

A Study to Recover Si from End-of-Life Solar Cells using Ultrasonic Cleaning Method

본 연구에서는 사용 후 태양광 셀을 HCl 용액 및 초음파세척기의 cavitation효과를 사용하여 셀 표면의 불순물(Al, Zn, Ag 등)을 제거하여 Si을 선택적으로 회수하기 위한 최적 공정 조건을 찾기 위한 연구를 진행하였다. 태양광 셀에서 Si을 선택적으로 회수 하기 위해 HCl 용액 및 초음파세척기를 사용하여 침출을 진행하였고, 반응이 끝난 태양광 셀은 증류수로 세척 후 건조 오븐에 건조를 실시하였고, 반응된 HCl 용액은 감압 여과 실시 후 여과된 용액은 ICP-Full Scan 분석을 실시하였다. 또한, 건조 된 태양광 셀은 유발을 사용하여 파쇄 후 XRD, XRF, 및 ICP-OES 분석을 실시하였으며, 이를 통해 Si의 순도 및 회수율을 알 수 있었다. 실험은 산용액 농도, 반응 온도, 반응 시간, 초음파 세기를 변수로 두고 실험을 진행하였다. 위 과정을 통해 최종적으로 태양광 셀로부터 Si을 선택적으로 회수하기 위한 최적 공정 조건은 산용액 농도 3M HCl, 반응 온도 60℃, 반응 시간 120min, 초음파 세기 150W인것을 알 수 있었고, 최종적으로 Si의 순도는 99.85%, 회수율은 99.24%로 측정되었다. In this study, we determine the optimal process conditions for selectively recovering Si from a solar cell surface by removal of impurities (Al, Zn, Ag, etc.). To selectively recover Si from solar cells, leaching is performed using HCl solution and an ultrasonic cleaner. After leaching, the solar cells are washed using distilled water and dried in an oven. Decompression filtration is performed on the HCl solution, and ICP-OES (Inductively Coupled Plasma Optical Emission spectroscopy) full scan analysis is performed on the filtered solution. Furthermore, XRD (X-ray powder diffraction), XRF (X-ray fluorescence), and ICP-OES are performed on the dried solar cells after crushing, and the purity and recovery rate of Si are obtained. In this experiment, the concentration of acid solution, reaction temperature, reaction time, and ultrasonic intensity are considered as variables. The results show that the optimal process conditions for the selective recovery of Si from the solar cells are as follows: the concentration of acid solution = 3 M HCl, reaction temperature = 60℃, reaction time = 120 min, and ultrasonic intensity = 150 W. Further, the Si purity and recovery rate are 99.85 and 99.24%, respectively.

Technology of enzymatic-acid hydrolysis of bone raw material in production of gelatine

Bone gelatin is an important and irreplaceable item widely used in the food industry and pharmaceutical production; it is also widely used in tissue engineering and other spheres. Due to widespread use of gelatin it is necessary to search for new safe and effective technologies for bone gelatin production. This research represents the results of enzymatic-acid hydrolysis of raw material in the process of gelatin production. The article presents the results of hydrolysis analyzes, the results of the main quality parameters of the obtained gelatin samples; and the major technological scheme for gelatin production is proposed here. As result of developed technology of enzymatic-acid hydrolysis of bone raw material with the ratio of raw material mass to the volume of solvent (HCl 1M and pepsin with an enzymatic activity of 40 units) as 1:9, duration of exposure: 180 minutes (3 hours), at the stage of demineralization, liming and de-ashing, we obtained samples of gelatin at yield rate of 12.1% from the initial mass of raw materials, which is 6.9% higher in comparison with the lowest yield of gelatin according to the proposed schemes. It is shown that the samples have a high protein mass fraction 91.4%, and a low fat mass fraction 0.4%, the obtained results indicate the high technological qualities of the obtained gelatin sample, this is also confirmed by high strength of gel according to Bloom scale, which value varies within the range of 290 ± 0.7 units.

Corrosion Behavior of Cr19Fe22Co21Ni25Mo13 Alloy in 1M Nitric Acid and 1M Hydrochloric Acid Solutions

The present work studied the microstructures of Cr19Fe22Co21Ni25Mo13 alloy, and tested the polarization properties in deaerated 1M nitric acid and 1M hydrochloric solutions at different temperatures. The alloy was processed by an argon atmosphere arc-melting. Results indicated that the microstructure of Cr19Fe22Co21Ni25Mo13 alloy was a dendritic one. The dendrites of Cr19Fe22Co21Ni25Mo13 alloy were an FCC structure, and the interdendrites of Cr19Fe22Co21Ni25Mo13 alloy were a eutectic structure with two phases of FCC and simple cubic (SC). The Cr19Fe22Co21Ni25Mo13 alloy had better corrosion resistance compared with commercial 304 stainless steel in both deaerated 1M HNO3 and 1M HCl solutions. The corrosion types of Cr19Fe22Co21Ni25Mo13 alloy in both of 1M HNO3 and 1M HCl solutions were uniform corrosion.

Corrosion protection evaluation of Allium Jesdianum as a novel and green source inhibitor for mild steel in 1M HCl solution

In this study, Allium Jesdianum extract (AJE) as a green banner for mild steel in 1 M HCl solution was appraised by some corrosion tests. The maximum inhibition efficiency about 96.18% was achieved by electrochemical impedance spectroscopy. The prominent declines of corrosion current density in both cathodic and anodic branches, as well as mixed-type inhibition, were confirmed by the potentiodynamic polarization technique. According to weight loss measurement, inhibition performance is dependent on AJE concentration. The adsorption of banner on the metal surface followed the Langmuir adsorption isotherm. Surface morphology and characterization methods were used to prove the inhibition mechanism.

Effect of Different Concentrations of Titanium Oxide (TiO2) Addition on the Crystallization Behaviour and Some Properties of Alkaline Earth Aluminosilicate Glass-Ceramics

Glass-ceramics in the CaO-MgO-Al2O3-SiO2 quaternary base glass system was produced via melting technique using feldspar, limestone and magnesite as sources of starting materials. Glass-ceramics production involves making a base glass, annealing and cooling to room temperature and then reheating the base glass to nucleation and crystal growth temperatures. Characterization of the produced glass-ceramics was carried out using a scanning electron microscope (SEM). The effects of the crystallization process on some properties such as hardness, chemical durability in acid and alkali media of samples were determined. The results portrayed that glass-ceramic samples to which various amounts of TiO2 (2,4,6,8 and 10 wt.%) were incorporated showed the formation of crystalline phases dispersed in the matrix of their respective residual glassy phases. Significant improvement in hardness, as well as minimum weight loss, were recorded for all the glass-ceramic samples. On the contrary, the glass samples did not crystallize despite subjecting them to heat treatment, their hardness values were low and they were not resistant to acid (1M HCl) and alkali (1M NaOH) attacks. The inability of TiO2 addition to fully transform them into glass-ceramics remains a shortcoming. However, the glass-ceramic samples obtained from this study can be used for tiling works.

Insight into Anticorrosion Mechanism of Ampicillin on Mild Steel in Acidic Environment: A Combined Experimental and Theoretical Approach

The corrosion inhibition of mild carbon steels in an acidic environment by using ampicillin (AMP) has been evaluated based on experimental and quantum chemistry techniques. The experimental results indicate that the inhibition efficiency goes up at higher AMP concentration. The highest inhibition efficiency reaches 84.9% for polarization measurement and 90.1% for electrochemical impedance spectroscopy with the inhibitor of concentration 100 ppm at 298 K. The surface characteristics (SEM) also reconfirm the steel corrosion inhibition ability of AMP. Some important chemical factors such as EHOMO (highest occupied molecular orbital energy), ELUMO (lowest unoccupied molecular orbital energy), ΔEL−H (energy gap), and Fukui functions were calculated based on the optimized configuration of AMP at the theoretical level of B3LYP/6-31+G(d,p). Moreover, Monte Carlo and molecular dynamics simulations were used to analyze the absorption behavior of inhibitor on the surface of Fe(110), which supplies the mechanism of inhibition corrosion processes. The obtained results showed that AMP is considered to be a potential corrosion inhibitor for mild steel in 1M HCl medium. Moreover, the protonated state of AMP plays an important role in the protection of Fe surface against the corrosive process.

A sequential extraction procedure for particulate manganese and its application to coastal marine sediments

An existing sequential extraction scheme for particulate iron (Fe) is evaluated for manganese (Mn) using a range of Mn standards. The scheme consists of 5 steps and quantifies 5 operationally defined Mn pools (1) poorly ordered Mn oxides and Mn phosphates (ascorbic acid extractable); (2) Mn carbonates and Mn sulfides (1M HCl extractable), (3 and 4) crystalline Mn oxides (citrate buffered dithionite and ammonium oxalate extractable, respectively) and (5) Mn associated with pyrite (concentrated HNO3 extractable). Application of the extraction scheme to coastal sediments from six locations (Black Sea, Baltic Sea, Bothnian Sea, Gulf of Mexico and Chesapeake Bay) highlights the dependency of sediment Mn partitioning on bottom water redox conditions. In sediments deposited in anoxic and sulfidic (euxinic) bottom waters, Mn is mostly present in Mn carbonates, pyrite and in non-reactive Mn forms, in approximately equal amounts. We find that in sediments deposited in periodically euxinic and hypoxic (oxygen <63μmolL−1) waters, Mn carbonates dominate over the two other fractions, and small amounts of Mn oxides are observed. In sediments deposited in oxygenated bottom waters, Mn oxides, Mn-rich vivianite-type minerals and Mn carbonates dominate and no pyrite-bound Mn is observed. A large advantage of the extraction scheme is that it quantifies sediment forms of Mn and Fe simultaneously. Given the role of Mn as a bottom water redox proxy, the separation of poorly ordered Mn oxides, carbonates and pyrite is of specific relevance.

Investigation of a Relative Weight Ratio of Graphite/Zinc Matrix Composite with a High-Resistance to Corrosion

There has been a significant increase in the use of composite materials to reinforce metallic structures. Such an increase has been especially noted in marine and underground applications, where there is a higher corrosion impact. Whilst there have been several attempts to investigate the mechanical properties of several synthesized composite materials, few of these have analyzed the corrosion of such composite materials at different weight ratios. The aim of this paper is to explore the best weight ratios of a graphite/Zinc composite matrix that would yield the lowest corrosion rate for a variety of applications. The research is validated using experimentation based on six additives of graphite (1wt%, 2.5wt%, 4wt%, 6wt%, 8wt%, and 10wt%), which are used as reinforcements for a range of weight ratios. The additives were prepared using the powder metallurgy method. The corrosion rate for all specimens used was carried out at the room temperature of 27 °C. Analysis results showed that 1wt% of graphite additive has the highest corrosion resistance compared to other weight ratios tested. This has been verified by examining the microstructure of the composite using an optical microscope for 12h, 24h, and 48h of immersion time in a 1M HCl acid solution.

Expired Chicken Egg-White Extract’s Adsorption Behavior As a Corrosion Inhibitor for Carbon Steel in 1M HCl

The inhibitory activity of the expired egg-white carbon steel (CS) extract in HCl solution was studied in this article. The extract was examined using FT-IR, and the surface was examined using a scanning electron microscope (SEM) and energy-dispersive X-ray analysis (EDX). Weight loss techniques at various temperatures were used to examine corrosion investigations (298, 308, 318, and 328 K), concentrations (100, 200, 400, and 800 mg. L−1) of extracts, and electrochemical measurements (potentiodynamic polarization (PDP) and impedance spectroscopy (EIS) at 25°C and different concentrations. Results. Results obtained through EIS demonstrated a maximal inhibition efficiency of 90% at an inhibitor concentration of 800 mg. L−1. Moreover, the findings of the potentiodynamic polarization indicated that egg-white extract was a mixed type of inhibitor and slowed down both cathodic and anodic reactions. For weight loss analysis, an inhibitory potency (89, 83, 77, and 71%) at various temperatures (298, 308, 318, and 328 K) was demonstrated, respectively. It indicates that the temperature rise contributes to a decrease in the resistance of the carbon steel. The adsorption of the expired egg-white extract was spontaneous with physisorption and chemisorption according to the Langmuir isotherm model, according to adsorption isotherm studies.

Effect of 1-Acetyl-1H-Benzotriazole on Corrosion of Mild Steel in 1M HCl

The corrosion inhibition study of 1-acetyl-1H-benzotriazole (ABTZ) on mild steel in 1M HCl solution has been investigated using different techniques like weight loss, open circuit potential (OCP), and potentiodynamic polarization. Results showed that ABTZ inhibited mild steel corrosion in acid solution and indicated that the inhibition efficiencies increased with the increase in inhibitor concentration. The polarization curves revealed that the studied compound behaved as a mixed-type of inhibitor. The adsorption of the inhibitor on the surface of mild steel in the corrosive environment followed the Langmuir isotherm. The presence of thin film formed due to adsorption of ABTZ on mild steel surface is further confirmed by scanning electron microscopy (SEM) and energy dispersive X-ray analysis (EDAX).

Microstructure and Mechanical Properties of the 55CrMoV4 Steel Exposed to Boriding and Nitriding Treatments

In this study boriding and nitriding treatments were carried out on 55CrMoV4 low alloyed steel. The thermochemical treatments were carried out in solid medium by the powder technique at 900℃ for 4 hours for boriding treatment and at a temperature of 550℃ for 12 hours for nitriding treatment. The phases analysis of the boride and nitrite layers formed on the surface was carried out by optical microscopy (OM), and X-ray diffraction (XRD). The results of the surface analysis show that the boride and nitride layers a presence of FeB, Fe2B, CrN, Fe3N and Fe4N compounds. The thickness of boride layers and nitride layers was found to be 55 and 12 µm, respectively. Microhardness of boride and nitride layers are between 800 HV0.2 and 1200 HV0.2. Corrosion tests by immersion in a 1M HCl solution have shown the beneficial effect of boriding and nitriding treatments on treated steels. Increase in corrosion resistances was observed after nitriding and boriding treatment steel 55CrMoV4 was around 6 times.

Penentuan Kondisi Optimum Pembentukan Natrium Silikat (Na2SiO3) Menggunakan Material Dasar Silika Alam dan Natrium Hidroksida (NaOH)

The purpose of this research are to investigate the effective synthesis of sodium silicate and knowing the optimum conditions of the sodium silicate from its solubility in water. Synthesis of sodium silicate was carried out by first activating silica using 1M HCl. The activated silica is then added with NaOH. Based on XRF analysis, it was found that the sodium silicate synthesis method is more effective at high temperatures. Determination of the optimum conditions was carried out at various concentrations of NaOH (2M, 3M, 4 M, 5M and 6M). Based on the research that has been done, the optimum conditions for sodium silicate were obtained by adding NaOH with a concentration of 4M.

Surface Analysis, Mechanical and Corrosion Behavior of Welded Steel in 1M HCl Corrosive Media with Epoxy/Alumina Coating

Asparagus roots were dried in four selected driers vacuum, fluidized bed, tray, and solar dryer at temperatures starting from 40 to 70 °C. The drying kinetics of asparagus roots was studied with the analysis of the influence of all stated drying conditions on the drying rate, dehydration ratio, rehydration characteristic, color characteristics, and energy consumption. With an increase in the temperature required for drying asparagus, there is an increasing trend of dehydration ratio (DR) and decreasing trend of drying time. The rehydration characteristics are found to be increases with a decrease in drying temperature from 70-60 °C but decrease with a further decrease in drying temperature from 60-40 °C. The energy consumption based on the drying conditions showed great thermal sensitivity and was found higher for low-temperature drying. The results of color characteristics (Chroma, hue angle, and ΔE) showed that the cream color of roots was relatively unaffected by drying. However, the brightness of roots was observed to be increased. Eleven thin-layered drying mathematical models were applied to experimental data of different drying conditions, and the model best describing its behavior was selected based on the coefficient of determination (R2), sum square error (SSE), and root mean square error (RMSE). All selected models give good fitting results (R2 &gt; 0.96) and found the cubic model as the most suitable model for all treatments (R2 &gt; 0.99).

Scientific Advances and Pharmacological Applications of Marine Derived-Collagen and Chitosan

This work is devoted to investigating the effect of arc welding energy on microstructures and mechanical properties of steel 316L. This later is very useful in industrial, infrastructure transportation, containers shipping, and almost logistic applications. For that reason, five samples of welded steel 316L were carried out based on many parameters to reveal some properties (microstructure, mechanical, corrosion resistance, etc.). To reveal the anticorrosion efficiency. The epoxy/Alumina composite coating on welded steel 316L is tested in 1M HCl acidic media. This manipulation shows excellent corrosion resistance thanks to epoxy/Alumina coated. The choices of this coating are based on the environment, cost and safety. The used epoxy is only degrading with fire but not toxic. Also, it is not a costly method, and it is widely used and performed. Impedance studies on samples of welded steel 316L were conducted in 1M HCl media. The results showed that transfer resistance is increasing with the increase of welding energy. This result was assessed by potentiodynamic polarization measurements indicating a noticeable reduction of current densities with welding energy decrease. The scanning electron microscope (SEM) micrograph was undertaken in order to check how far the studied samples are protected by the used coating in such aggressive media.

Experimental and theoretical studies on corrosion inhibitory action of Peganum harmala (L.) seeds extract on carbon steel in 1M HCl

The objective of this study is to test the inhibitory efficiency of the methanol extract of P. harmala against the corrosion of carbon steel C38 in 1M hydrochloric acid by gravimetric method and electrochemical measurements. The results indicated that the methanol extract of P. harmala is a good inhibitor of carbon steel. The inhibition efficiency increases with the increase of the concentration of the inhibitor. The nature of adsorption of the extract on carbon steel surface was in conformity with Langmuir isotherm. Both kinetic and thermodynamic parameter of adsorption allows us to suggest chemical adsorption of this inhibitor on the metal. Potentiodynamic polarization measurements show that P. harmala acts as mixed type inhibitor. The result of EIS was correlating with the result of polarization measurement. A theoretical study was done in solution for major alkaloids isolated from P. harmala seeds, and was investigated using density functional theory (DFT) at the B3LYP/6-31G(d,p) basis set level through the relationship between their molecular and electronic structure. The quantum chemical parameters such as E HOMO (highest occupied molecular orbital energy), E LUMO (lowest unoccupied molecular orbital energy), energy gap (ΔE), dipole moment (μ), absolute hardness (η), absolute softness (S), the absolute electronegativity (χ), the fractions of electrons transferred from the inhibitor molecule to the metallic atom (ΔN) and the electrophilicity index (ω) were calculated. The local selectivity and reactivity has been analyzed through the Fukui function indices in order to compare the possible sites for nucleophilic and electrophilic attacks.

Effect of HCl Concentration and Acetone Washing on the Dielectric and Conduction Properties of Polyaniline Salts

Background: In order to know the effect of acid concentration, comparative electrical properties of PANI salt samples prepared in two different media like water, 1M HCl and 2M HCl, have been studied. Methods: To know the effect of acetone washing on the electrical behavior of the polymer, the polymer samples were washed with acetone. The X-ray diffraction pattern shows a crystalline nature of all the prepared PANI salt samples except non-acetone washed PANI salt prepared in 2M HCl. The SEM micrograph suggests a uniform and continuous morphology for PANI salts prepared in 1M HCl, agglomerated granulated structure for PANI salts prepared in 1M HCL, and fiber type structure for PANI salts prepared in 2M HCl. Results: The study showed that the dielectric constant decreases with frequency in the case of all the synthesized polymer samples. The variation of AC conductivity of the synthesized polymer samples with respect to the frequency at room temperature follows the power law. Through the fitting parameters, the DC conductivity was found. Conclusion : The results showed that the polymer sample, which was prepared in water medium and not washed with acetone, had the highest dielectric and conductivity values, whereas for acetone washed samples highest dielectric and electrical conductivity was observed for the sample prepared in 2M HCl.

Synthesis, Characterization of New Polytriazole Derivatives from Polyacryloyl chloride and Theoretical with Corrosion Inhibitor Study for Stainless steel in acidic medium

The purpose of the study is to synthesize and characterize a new polytriazole derivative from polyacryloyl chloried, first reaction of polyacryloyl chloride with hydrazine hydrate in the presence of DMF as a solvent to obtained acid hydrazide (1) than reacted with different amide to give poly 1,2,4-triazole derivatives(1a-1c). Newly synthesized compounds were characterized by spectral methods [13C-NMR, 1H-NMR, and FTIR] and calculated some of its physical properties. Also, we worked theoretical study involving calculated the geometric configurations, total energy, dipole moment etc..,. In addition, the inhibition effect of the synthesized compounds (1a-1c) on corrosion of stainless steel in 1M HCl were studied by method of weight loss. The results of weight loss measurements showed that corrosion inhibition efficiency by increasing the concentration of organic inhibitors for stainless steel in 1M HCl solution at 30oC.