Improvement of corrosion resistance of materials coated with a Cr2O3/NiCr dilayer using a sealing treatment

Li, C.L.; Zhao, H.X.; Takahashi, T.; Matsumura, Masanobu

doi:10.1016/s0921-5093(00)01976-6

Cited by 32 publications

(14 citation statements)

References 23 publications

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“…The Cr2O3 NPs have great applications such as green pigment [21], corrosion resistant [22], liquid crystal displays [23], high temperature resistant material [24], coating materials [25,26] and heterogeneous catalyst [27,28]. Sangwan et al, have synthesized Cr2O3 NPs by reduction of potassium dichromate solution with Arachishy pogaea leaf tested bactericidal effect against E. coli and Enterococcus faecalis where they had been analyzed and found that these particles are effective bactericide [29].…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Cr2O3 Nanoparticles with High Antimicrobial Activity

Sharma¹,

Sharma²,

Sharma³

2019

JNST

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Currently, the development of green metal NPs through ecofriendly technique has become a major focus of researchers. The current study highlights the antimicrobial activity of Cr2O3 NPs, synthesized by Cannabis sativa (Bhang), Azadirachta indica (Neem), Ocimum sanctum (Tulsi) plants leaves extract. The characterization of Cr2O3 NPs was attained by SEM with EDX, TEM and XRD analysis. Moreover, synthesized Cr2O3 NPs were evaluated for their antimicrobial activities against fungi such as P. triticena, A. niger, A. flavous, F. species and bacteria such as S. aureus, B. subitilis, E. coli and P. fluorescence. The Cr2O3 NPs synthesized by Cannabis sativa leaves extract were found to exhibit high antimicrobial activities towards all microbial species. The Cr2O3 NPs shows a clear zone of inhibition at concentration 500 ppm. The results revealed that P. triticena was tremendously sensitive while interacting with Cr2O3 nanoparticles. The outcomes of antimicrobial studies divulged that the Cr2O3 NPs are more potent in comparison to the metal salts as well as plants leaves extract. Therefore, the Cr2O3 NPs are supposed to be great antimicrobial agents.

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Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Cr2O3 Nanoparticles with High Antimicrobial Activity

Sharma¹,

Sharma²,

Sharma³

2019

JNST

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“…Recently, chromium oxides (Cr 2 O 3 ) have attracted much attention due to their importance in science as well as in technology. Chromia (Cr 2 O 3 ), possess specific applied applications such as in high-temperature resistant materials [1], corrosion resistant materials [2], liquid crystal displays [3], green pigment [4], heterogeneous catalysts [5,6], coating materials [7,8], and so on. The intrinsic properties of inorganic materials are mainly determined by their composition, structure, crystallinity, size and morphology; great efforts have been devoted to the investigation of different Cr 2 O 3 materials synthesis [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization and Antibacterial Activities of Chromium Oxide Nanoparticles Against Klebsiella Pneumoniae

Sangwan¹,

Kumar²

2017

Asian J Pharm Clin Res

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Objective: This paper consists of synthesis of chromium oxide (Cr 2 O 3 ) nanoparticles by sol-gel technique, their characterization and investigation of antibacterial activity of these nanoparticles against pathogenic bacteria by measuring zone of inhibition, colony forming units, and optical density (OD) on solid agar media as well as in liquid medium. Methods:The Cr 2 O 3 nanoparticles were synthesized by sol-gel technique using tetraethylorthosilicate as precursor. The synthesized Cr 2 O 3 nanoparticles were characterized by X-ray diffraction (XRD), Fourier-transform infrared spectroscopy, ultraviolet-visible spectroscopy, and transmission electron microscopy (TEM) techniques. The antibacterial effect of these Cr 2 O 3 nanoparticles against Klebsiella pneumoniae was investigated both on the solid agar plates and in liquid medium supplemented with different concentrations of Cr 2 O 3 nanoparticles. The antibacterial activity of Cr 2 O 3 nanoparticles was also compared with the antibacterial activities of the standard antibiotics such as ampicillin, chloramphenicol, penicillin G, streptomycin, sulphatriad, and tetracycline which were taken in the form of hexa discs.Results: Average particle size of the Cr 2 O 3 nanoparticles was found to be 24.0 nm. It was observed that K. pneumoniae is resistant to the penicillin G and ampicillin, but Cr 2 O 3 nanoparticles show good antibacterial property. The minimum inhibitory concentration of Cr 2 O 3 for K. pneumoniae is 2.5 mg/ml. The bacterial growth was monitored by measuring zone of Inhibition, colony formation unit, and OD method. Conclusion:Sol-gel technique is a convenient and easy technique for the synthesis of metal nanoparticles. Nanosized Cr 2 O 3 particles showed an effective antibacterial activity against K. pneumoniae. Therefore, Cr 2 O 3 nanoparticles due to its low manufacturing cost and high effectiveness in antimicrobial properties may find wide applications in various industries to address safety issues.

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“…As the chromium have different stable oxidation states, it ORIENTAL JOURNAL OF CHEMISTRY www.orientjchem.org can form the different types of oxides. Special attention has been focused on the formation and properties of chromium oxide (Cr 2 O 3 ), which is important in specific applied applications such as in high temperature resistant materials [14], corrosive resistant materials 15 , liquid crystal displays 16,17 , green pigment 18 , catalysts 19,20 and so on. It is well known that intrinsic properties of inorganic materials are mainly determined by their composition, structure, crystallinity, size and morphology; great efforts have been devoted to the investigation of different Cr 2 O 3 materials synthesis [21][22][23] Ming Hua and co-workers 35 have studied the nano-sized metal oxides, including ferric oxides, manganese oxides, aluminum oxides, titanium oxides, magnesium oxides and cerium oxides, which provide high surface area and specific affinity for heavy metal adsorption from aqueous systems.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Chromium Oxide Nanoparticles

Jaswal¹,

Arora²,

Kinger³

et al. 2014

Orient. J. Chem.

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Chromium oxide nanoparticles (NPs) have been rapidly synthesized by precipitation method using ammomia as precipitating agent and are characterized by using X-ray Diffraction (XRD), Thermo Gravimetric Analysis (TGA), UV-Visible absorption (UV), Infrared Spectoscopy (IR), Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM). XRD studies show that chromium oxide NP is formed as Cr 2 O 3 and it has hexagonal structure. The shape and particle size of the synthesized Cr 2 O 3 NPs is determined by SEM and TEM. The images showed that the size of NPs of Cr 2 O 3 varied from 20 nm to 70 nm with average crystalline size 45 nm. UVVisible absorption and IR spectoscopy confirm the formation of nanosized Cr 2 O 3 . TGA verifies that the Cr 2 O 3 NPs are thermally stable upto 1000 °C.

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Improvement of corrosion resistance of materials coated with a Cr2O3/NiCr dilayer using a sealing treatment

Cited by 32 publications

References 23 publications

Facile Synthesis of Cr2O3 Nanoparticles with High Antimicrobial Activity

Facile Synthesis of Cr2O3 Nanoparticles with High Antimicrobial Activity

Synthesis, Characterization and Antibacterial Activities of Chromium Oxide Nanoparticles Against Klebsiella Pneumoniae

Synthesis and Characterization of Chromium Oxide Nanoparticles

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