Electrolytic Zinc Composite Coatings: Ultrasound Assisted Deposition for Morphological and Composition Modification

2019 ◽  
Vol 92 (10) ◽  
pp. 25-46
Author(s):  
Lucas Baissac ◽  
Cedric C. Buron ◽  
Jean-Yves Hihn ◽  
Ludovic Chantegrel
Keyword(s):  
Composite Coatings ◽  
Electrolytic Zinc ◽  
Composition Modification ◽  
Ultrasound Assisted

scholarly journals Ultrasound Assisted Electrodeposition of Cu-SiO2 Composite Coatings: Effect of Particle Surface Chemistry

2019 ◽  
Vol 166 (8) ◽  
pp. D244-D251 ◽  
Author(s):  
L. N. Bengoa ◽  
A. Ispas ◽  
J. F. Bengoa ◽  
A. Bund ◽  
W. A. Egli
Keyword(s):  
Surface Chemistry ◽  
Composite Coatings ◽  
Particle Surface ◽  
Ultrasound Assisted

Ultrasound-assisted electrodeposition of thin nickel-based composite coatings with lubricant particles

2015 ◽  
Vol 276 ◽  
pp. 89-105 ◽  
Author(s):  
Ignacio Tudela ◽  
Yi Zhang ◽  
Madan Pal ◽  
Ian Kerr ◽  
Andrew J. Cobley
Keyword(s):  
Composite Coatings ◽  
Thin Nickel ◽  
Ultrasound Assisted

scholarly journals Ceria Particles as Efficient Dopant in the Electrodeposition of Zn-Co-CeO2 Composite Coatings with Enhanced Corrosion Resistance: The Effect of Current Density and Particle Concentration

Molecules ◽  
2021 ◽  
Vol 26 (15) ◽  
pp. 4578
Author(s):  
Marija Riđošić ◽  
Mihael Bučko ◽  
Asier Salicio-Paz ◽  
Eva García-Lecina ◽  
Ljiljana S. Živković ◽  
...  
Keyword(s):  
Current Density ◽  
Polarization Resistance ◽  
Electrochemical Impedance ◽  
Composite Coatings ◽  
Scattering Method ◽  
Particle Content ◽  
Small Current ◽  
Corrosion Stability ◽  
Magnetic Stirring ◽  
Ultrasound Assisted

Novel Zn-Co-CeO2 protective composite coatings were deposited successfully from chloride plating solutions. Two different types of ceria sources were used and compared: commercial ceria powder and home-made ceria sol. Electrodeposition was performed by a direct current in the range of 1–8 A dm−2. Two different agitation modes were used and compared, magnetic stirring and ultrasound-assisted stirring (US). The influence of magnetic stirring on the stability of the related plating baths was evaluated via a dynamic scattering method. The results pointed to better stability of the prepared ceria sol. The morphology of the composite coatings was examined by scanning electron microscopy (SEM), and particle content was determined by energy-dispersive X-ray spectroscopy (EDS). The results showed that the increase in the deposition current density was not beneficial to the coating morphology and particle content. The corrosion behavior of the Zn-Co-CeO2 composite coatings was analyzed and compared by electrochemical impedance spectroscopy and polarization resistance. The ultrasound-assisted electrodeposition at small current densities was favorable for obtaining composite coatings with enhanced corrosion stability. The protection was more effective when US was applied and, additionally, upon utilization of ceria sol as a particle source, which was revealed by higher polarization resistance and greater low-frequency impedance modulus values for sol-derived composite coatings deposited under ultrasound.

Ultrasound-assisted electrodeposition of composite coatings with particles

2014 ◽  
Vol 259 ◽  
pp. 363-373 ◽  
Author(s):  
Ignacio Tudela ◽  
Yi Zhang ◽  
Madan Pal ◽  
Ian Kerr ◽  
Andrew J. Cobley
Keyword(s):  
Composite Coatings ◽  
Ultrasound Assisted

Innovative Extraction Techniques for the Optimum Extraction of Phenolic Compounds from Peanut Meal and Evaluation of Their Biological Activities

2019 ◽  
Vol 4 (2) ◽  
Keyword(s):  
Phenolic Compounds ◽  
Carcinoma Cell ◽  
Biological Activities ◽  
Peanut Meal ◽  
Ultrasound Assisted Extraction ◽  
Carcinoma Cell Lines ◽  
Assisted Extraction ◽  
Phenolic Extract ◽  
Ultrasound Assisted ◽  
Water Ratio

There is a worldwide demand for phenolic compounds (PC) because they exhibit several biological activities. This work aimed at extracting phenolic compounds from peanut meal. The methods of extraction were mainly: conventional solvent extraction (traditional methods) and ultrasound assisted extraction (recent methods) and comparing their results. Peanut meal (PM) was prepared by defatting with n-hexane, and then extracted by the two previous methods. First, the conventional solvents used were 80% methanol, ethanol, acetone, isopropanol, and distilled water. Then studied Different parameters such as meal: water ratio, also the effect of temperature and the pH on the extraction process. Second, ultrasonic assisted extractions (USAE), the parameters investigated were temperature, time and speed of sonication. Finally, all the extracts were analyzed by HPLC for their phenolic contents. Results indicated that the highest extracted PC achieved by solvents was in distilled water where 1:100, Meal: Water ratio which extracted 40 mg PC / g PM at 30& 35°C. Highest extracted PC was achieved by alkaline medium at pH 12 more than acidic and neutral medium. While (USAE) at speed 8 ultrasonication and temperature 30ᵒC, extracted 49.2mg PC /g PM. Sothe ultrasound assisted extraction exhibited great influence on the extraction of phenolic compounds from peanut meal. The ultrasonic peanut extract was examined for its antioxidant, antimicrobial and anticarcinogenic activities. The antioxidant activity of PM phenolic extract prepared by ultrasonic technique, was measured by, β-carotene, and DPPH methods, and reducing antioxidant power. Results revealed values: 84.57, 57.72 and 5960 respectively. The PM extract showed different levels of antimicrobial activity against the pathogenic bacteria used. As for the anticarcinogenic effect PM phenolic extract most effective on inhibiting colon carcinoma and lung carcinoma cell lines with IC50 = 20.7 and 20.8 µ/ml., respectively. This was followed by intestinal carcinoma and liver carcinoma cell lines with IC50= 39.6 and 40.2µ/ml.

Microwave Absorbing Properties of Carbon Fibers Modified with BN/SiC Composite Coatings

2014 ◽  
Vol 29 (10) ◽  
pp. 1093 ◽  
Author(s):  
ZHOU Wei ◽  
XIAO Peng ◽  
LI Yang ◽  
LUO Heng ◽  
HONG Wen
Keyword(s):  
Carbon Fibers ◽  
Composite Coatings ◽  
Microwave Absorbing Properties ◽  
Microwave Absorbing
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