Preparation of Degradable Superhydrophobic Mg/P/Z/F/H Composite Materials and Their Anticorrosion

In this study, the degradable superhydrophobic Mg/P/Z/F/H (magnesium/poly(-caprolactone)/zinc oxide/1H,1H,2H,2H-perfluorodecyltriethoxysilane (PFDTES)/heating process) composite materials were prepared through dip-coating method and heating process, for enhancing the corrosion resistance of the AZ91D magnesium alloys. The electrochemical measurements revealed that the Mg/P/Z/F/H materials significantly improved the corrosion resistance of the magnesium alloys in 3.5 wt.% NaCl. The Mg/P/Z/F/H composite materials exhibited efficient self-cleaning properties, good adhesion strength, and stability in wet atmosphere.

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Preparation of Degradable Superhydrophobic Mg/P/Z/F/H Composite Materials and Their Anticorrosion

10.20944/preprints202108.0505.v1 ◽

2021 ◽

Author(s):

Zhongxian Xi ◽

Chengqing Yuan ◽

Xiuqin Bai ◽

Chun Wang ◽

Anne Neville

Keyword(s):

Corrosion Resistance ◽

Composite Materials ◽

Magnesium Alloys ◽

The Self ◽

Heating Process ◽

Good Adhesion ◽

Step Method ◽

One Step ◽

Self Cleaning ◽

Poly Caprolactone

In this study, the degradable superhydrophobic Mg/P/Z/F/H (magnesi-um/poly(-caprolactone)/zinc oxide/1H,1H,2H,2H-perfluorodecyltriethoxysilane (PFDTES)/ heating process) composite materials were prepared through one-step method for enhancing the corrosion resistance of AZ91D magnesium alloys. Electrochemical measurements showed that Mg/P/Z/F/H materials significantly improved the corrosion resistance of magnesium alloys in 3.5 wt.% NaCl. The self-cleaning, adhesion and stability tests suggested that Mg/P/Z/F/H composite materials had well self-cleaning properties, good adhesion strength and stability in wet atmosphere.

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Effect of GelMA Hydrogel Coatings on Corrosion Resistance and Biocompatibility of MAO-Coated Mg Alloys

Materials ◽

10.3390/ma13173834 ◽

2020 ◽

Vol 13 (17) ◽

pp. 3834

Author(s):

Wenxian Weng ◽

Weiwei Wu ◽

Xiaoming Yu ◽

Mingyue Sun ◽

Zhensheng Lin ◽

...

Keyword(s):

Corrosion Resistance ◽

Magnesium Alloys ◽

Dip Coating ◽

Crystallographic Structure ◽

X Ray Diffraction ◽

Hydrogel Coatings ◽

Coating Method ◽

Micro Arc Oxidation ◽

Dip Coating Method

Micro-arc oxidation (MAO) treatment is a simple and effective technique to improve the corrosion resistance for magnesium alloys. However, the presence of micro-pores and cracks on the coatings provides paths for corrosive ions to penetrate into and react with the substrate, limiting the long-term corrosion resistance. In this paper, we designed a composite coating with which GelMA hydrogel coatings with varying thicknesses were prepared on the surface of MAO-coated magnesium alloys via a dip-coating method, aiming to improve the biocorrosion resistance and biocompatibility. The surface morphology, the chemical composition of GelMA hydrogels, and the crystallographic structure of magnesium alloys were characterized by scanning electron microscope (SEM), Fourier-transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD), respectively. The corrosion resistance and biocompatibility of all samples were evaluated through electrochemical and biological experiments. The results demonstrated that the addition of GelMA hydrogel could effectively seal the pores and improve the corrosion resistance and biocompatibility of MAO-coated magnesium alloys, especially for the sample with one layer of GelMA hydrogel, showing high cell proliferation rate, and its current density (Icorr) was two orders of magnitude lower than that of the MAO coating. Besides, the balance mechanism between corrosion and protection was proposed. As a result, the GelMA hydrogel coatings are beneficial to the application of MAO-coated magnesium alloys in bone tissue engineering and other fields.

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Factors Affecting the Properties of Zinc Oxide Thin Films Prepared by Dip-Coating Method: A Review

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.667.193 ◽

2013 ◽

Vol 667 ◽

pp. 193-199 ◽

Cited By ~ 1

Author(s):

Mohd Firdaus Malek ◽

Mohamad Hafiz Mamat ◽

Mohamed Zahidi Musa ◽

Mohd Zainizan Sahdan ◽

Mohamad Rusop Mahmood

Keyword(s):

Thin Films ◽

Zinc Oxide ◽

Sol Gel ◽

Dip Coating ◽

Zno Thin Films ◽

Integrated Sensor ◽

Factors Affecting ◽

Oxide Electrodes ◽

Coating Method ◽

Dip Coating Method

Recent research papers for zinc oxide (ZnO) thin films prepared by dip-coating method are reviewed. The aim is on the factors affecting the properties of ZnO thin films prepared by dip-coating method and the preparation of ZnO solution precursor using sol-gel process. Several of journals have been discovered to find out the related study on this topic. It was found that solution chemical equilibrium, substrate and thermal processing are the factors that contribute to the various properties of ZnO thin films. This review hopefully can help in improving the properties of ZnO thin film for possible applications to photoconductor, integrated sensor, transparent conducting oxide electrodes, optoelectronic devices and so on.

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Influence of GPTMS Precursor Concentration as Pretreatment of Galvanized Steel

Materials Science Forum ◽

10.4028/www.scientific.net/msf.930.428 ◽

2018 ◽

Vol 930 ◽

pp. 428-433

Author(s):

Henrique Carvalho de Oliveira ◽

Oscar de Almeida Neuwald ◽

Lilian Vanessa Rossa Beltrami ◽

Gunther Johannes Lewczuk Gerhardt ◽

Sandra Raquel Kunst

Keyword(s):

Corrosion Resistance ◽

Steel Surface ◽

Chemical Conversion ◽

Dip Coating ◽

Precursor Concentration ◽

Galvanized Steel ◽

Electrochemical Characteristics ◽

Corrosion Resistance Property ◽

Coating Method ◽

Dip Coating Method

This work aims to evaluate the influence of the alkoxy precursor concentration on the morphological and electrochemical characteristics of the chemical conversion layer formed on a galvanized steel surface. Different films were obtained by the dip coating method varying precursor concentrations in 2, 5 and 10%. According to the SEM and EIS results the corrosion resistance property increases for higher GPTMS precursor concentrations.

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