Production of Colored Phosphate Coatings on Steel

2021 ◽  
Vol 1037 ◽  
pp. 457-463
Author(s):  
Viktoriya S. Konovalova ◽  
Varvara E. Rumyantseva
Keyword(s):  
Methylene Blue ◽  
Prussian Blue ◽  
Metal Corrosion ◽  
Phosphate Coatings ◽  
Metal Products ◽  
Ferrous Phosphate ◽  
Orange Color ◽  
Olive Green

Phosphating has long been successfully used as a method of protecting metal products and structures from corrosion. The possibility of obtaining non-ferrous phosphate coatings on steel by cold method was investigated. Compositions of cold phosphating solutions for the deposition of colored phosphate coatings of green and blue colors are proposed. To obtain green phosphate films, chromium salts and procyon olive green dye were introduced into the compositions of cold phosphating solutions. To obtain phosphate films of orange color, cobalt salts were introduced into the compositions of cold phosphating solutions. To obtain blue phosphate films, methylene blue and Prussian blue were introduced into the compositions of cold phosphating solutions. It was found that colored phosphate films are worse at preventing metal corrosion. Colored phosphate coatings have a higher porosity and are less uniform compared to modified phosphate films.

scholarly journals Studies on the reductase of liver and kidney.—Part I

1912 ◽  
Vol 85 (582) ◽  
pp. 486-494
Keyword(s):  
Methylene Blue ◽  
Prussian Blue ◽  
Animal Tissues ◽  
Reduction Processes ◽  
The Press ◽  
Liver And Kidney ◽  
Reducing Activity ◽  
Blue Methylene

The notion has been steadily gaining ground that the reducing powers of animal tissues are due to enzymic action. In March, 1910, one of us adduced evidence that this so-called “reductase” was active in the press-juice of liver and kidney of sheep, ox, horse, and frog. Soluble Prussian blue, methylene blue, and sodium indigo-disulphonate are all reduced more or less perfectly to leuco-compounds by press juice, whereas by a boiled control they are not. It seemed very desirable to conduct several lines of investigation arising out of the main contention that the tissues were capable of carrying out reduction-processes because they contained an endo-enzyme, viz., How rapidly does the press juice deteriorate in reducing activity; how does it behave in respect of such comparatively stable but reducible substances as NaNO 3 ; in what way, exactly, does its activity vary with temperature; in what way, if any, is the catalase of the liver related to the reductase ? It seemed, in particular, highly desirable that a method capable of following the reduction changes quantitatively should be devised in order to enable us to follow the velocity of any given reaction being studied.

Morphological control of lanthanide ferrocyanides and their highly efficient catalytic degradation performance toward organic dyes under dark ambient conditions

2018 ◽  
Vol 47 (17) ◽  
pp. 5933-5937 ◽  
Author(s):  
Shicheng Wang ◽  
Minli Gu ◽  
Junfeng Xu ◽  
Lei Han ◽  
Fei-Yan Yi
Keyword(s):  
Methylene Blue ◽  
Prussian Blue ◽  
Organic Dyes ◽  
Catalytic Degradation ◽  
Reusable Catalyst ◽  
Ambient Conditions ◽  
Prussian Blue Analogue ◽  
Rapid Degradation ◽  
Morphological Control ◽  
Highly Efficient

A Ce-prussian blue analogue (CePBA) with various morphologies and different sizes realizes the rapid degradation of a large amount of methylene blue molecules as a heterogeneous and reusable catalyst.

scholarly journals Fluorescent, Prussian Blue-Based Biocompatible Nanoparticle System for Multimodal Imaging Contrast

Nanomaterials ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1732
Author(s):  
László Forgách ◽  
Nikolett Hegedűs ◽  
Ildikó Horváth ◽  
Bálint Kiss ◽  
Noémi Kovács ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Prussian Blue ◽  
Fluorescent Dyes ◽  
Light Emission ◽  
Fluorescent Dye ◽  
Fluorescent Imaging ◽  
Fluorescent Light ◽  
Eosin Y ◽  
Biodistribution Studies

(1) Background. The main goal of this work was to develop a fluorescent dye-labelling technique for our previously described nanosized platform, citrate-coated Prussian blue (PB) nanoparticles (PBNPs). In addition, characteristics and stability of the PB nanoparticles labelled with fluorescent dyes were determined. (2) Methods. We adsorbed the fluorescent dyes Eosin Y and Rhodamine B and methylene blue (MB) to PB-nanoparticle systems. The physicochemical properties of these fluorescent dye-labeled PBNPs (iron(II);iron(III);octadecacyanide) were determined using atomic force microscopy, dynamic light scattering, zeta potential measurements, scanning- and transmission electron microscopy, X-ray diffraction, and Fourier-transformation infrared spectroscopy. A methylene-blue (MB) labelled, polyethylene-glycol stabilized PBNP platform was selected for further assessment of in vivo distribution and fluorescent imaging after intravenous administration in mice. (3) Results. The MB-labelled particles emitted a strong fluorescent signal at 662 nm. We found that the fluorescent light emission and steric stabilization made this PBNP-MB particle platform applicable for in vivo optical imaging. (4) Conclusion. We successfully produced a fluorescent and stable, Prussian blue-based nanosystem. The particles can be used as a platform for imaging contrast enhancement. In vivo stability and biodistribution studies revealed new aspects of the use of PBNPs.

scholarly journals Phosphate Coatings: EIS and SEM Applied to Evaluate the Corrosion Behavior of Steel in Fire Extinguishing Solution

2021 ◽  
Vol 11 (17) ◽  
pp. 7802
Author(s):  
Diana-Petronela Burduhos-Nergis ◽  
Gabriel Dragos Vasilescu ◽  
Dumitru-Doru Burduhos-Nergis ◽  
Ramona Cimpoesu ◽  
Costica Bejinariu
Keyword(s):  
Corrosion Resistance ◽  
Carbon Steel ◽  
Electrochemical Impedance ◽  
Health And Safety ◽  
Industrial Applications ◽  
Metal Corrosion ◽  
Protective Equipment ◽  
Fire Extinguishing ◽  
Phosphate Coatings ◽  
In Fire

Phosphate coatings are one of the most important methods in preventing metal corrosion, especially iron alloys. The high interest in this method for industrial applications is mainly due to the low costs associated with the phosphating solution component and technological process. Considering this aspect and the advantages offered to the materials (corrosion resistance, good adhesion, wear resistance), this study evaluates the potential of using the phosphate coating method in health and safety applications. Therefore, the deposition of a layer of zinc phosphate on the steel surface used in the manufacture of components for personal protective equipment was approached. Firefighters, during rescue/evacuation operations, use protective equipment for fall arrest, whose accessories (hooks, carabiners) are made of steel. Due to the low corrosion resistance property of carbon steel, these accessories must be replaced frequently. This paper aims to analyze the possibility of improving the corrosion resistance of carbon steel in a fire extinguishing solution. Accordingly, the electrochemical behavior of two different types of coatings was studied by electrochemical impedance spectroscopy (EIS) and scanning electron microscope (SEM). In the literature, different corrosion evaluating methods or systems have been considered, and up until now, there has been no previous study to have approached the corrosive behavior of C45, phosphate C45, and painted phosphate C45 immersed in fire extinguishing solution.

scholarly journals The degradation of methylene blue by microcubes catalyst -Fe2O3 via heterogenous Fenton process

2021 ◽  
pp. 35-40
Author(s):  
Ngo Thi My Binh Ngo
Keyword(s):  
Methylene Blue ◽  
Catalytic Activity ◽  
Prussian Blue ◽  
Rate Constant ◽  
Spectroscopic Methods ◽  
Fenton Process ◽  
Heterogeneous Fenton ◽  
Sem Images ◽  
Catalytic Materials ◽  
Fenton System

Cubic Fe2O3 was synthesized in a facile approach by annealing molecular organic framework Prussian Blue (PB) at 350oC, 550oC, and 650oC. The final product was characterized by IR, Raman and XRD spectroscopic methods illustrating the presence of pure a-Fe2O3. SEM images of this material revealed a homogeneous morphology of microcube Fe2O3 with a size of about 500 nm. The catalytic activity of cubic Fe2O3 was investigated on the degradation of methylene blue in a heterogeneous Fenton system. It was shown that the thermally oxidative decomposition of PB at 550oC has resulted in porous Fe2O3 which exhibited highest MB degradation efficiency. In the presence of 0.5 M H2O2 and 0.3 g/L Fe2O3 at pH = 3.59, 50 ppm MB in studied solution has been removed at a rate constant of 0.0398 min-1, which is comparable with other analogous catalytic materials.

A SEM and Light Microscope Study of the Epidermal Leaf Structures of the Carnivorous Plant, Sarracenia purpurea, L.

1971 ◽  
Vol 29 ◽  
pp. 358-359
Author(s):  
B. J. Panessa ◽  
J. F. Gennaro
Keyword(s):  
Methylene Blue ◽  
Toluidine Blue ◽  
Outer Surface ◽  
Microscope Study ◽  
Light Microscope ◽  
Carnivorous Plant ◽  
Sarracenia Purpurea ◽  
Inner Surface

Tissue from the hood and sarcophagus regions were fixed in 6% glutaraldehyde in 1 M.cacodylate buffer and washed in buffer. Tissue for SEM was partially dried, attached to aluminium targets with silver conducting paint, carbon-gold coated(100-500Å), and examined in a Kent Cambridge Stereoscan S4. Tissue for the light microscope was post fixed in 1% aqueous OsO4, dehydrated in acetone (4°C), embedded in Epon 812 and sectioned at ½u on a Sorvall MT 2 ultramicrotome. Cross and longitudinal sections were cut and stained with PAS, 0.5% toluidine blue and 1% azure II-methylene blue. Measurements were made from both SEM and Light micrographs.The tissue had two structurally distinct surfaces, an outer surface with small (225-500 µ) pubescent hairs (12/mm2), numerous stoma (77/mm2), and nectar glands(8/mm2); and an inner surface with large (784-1000 µ)stiff hairs(4/mm2), fewer stoma (46/mm2) and larger, more complex glands(16/mm2), presumably of a digestive nature.

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