Electroactive Epoxy-Titania Hybrid Anti-Corrosive Coatings Prepared by Small Basic Molecule-Catalyzed Sol-Gel Route

2013 ◽  
Vol 747 ◽  
pp. 35-38 ◽  
Author(s):  
Cheng Ming Chang ◽  
Jui Ming Yeh
Keyword(s):  
Titanium Dioxide ◽  
Corrosion Protection ◽  
Sol Gel ◽  
Electrochemical Corrosion ◽  
Oxygen Barrier ◽  
Protection Effect ◽  
Barrier Coating ◽  
Cold Rolled ◽  
Passive Metal ◽  
Oxygen Barrier Property

This article, the preparation and corrosion protection studies of a series of electroactive epoxy titanium dioxide (EET) hybrid materials containing conjugated segments of electroactive amino-capped aniline trimer (ACAT) and titanium dioxide (TiO2) nanoparticles of ~100 nm in diameter was first presented. It should be noted that EET at higher concentration of TiO2 was found to reveal better corrosion protection effect as compared to neat electroactive epoxy coating on cold-rolled steel (CRS) electrode based on electrochemical corrosion measurements in 3.5 wt% NaCl electrolyte. Effective enhancement of corrosion protection of EET coatings could be interpreted by electroactive epoxy as a densely physical barrier coating and the redox catalytic capabilities of ACAT units existed in EET may induce the formation of passive metal oxide layers on CRS electrode. Further the well-dispersed TiO2 nanoparticles in EET matrix could act as effective hinder to enhance the oxygen barrier property of EET.

Corrosion Protection of Nano-Silica Powder Coatingon Artificial Seawater

2021 ◽  
Vol 904 ◽  
pp. 519-524
Author(s):  
Gui Yun Zhang ◽  
Yong Wang ◽  
Tian Wei Zhang ◽  
Chen Yu Zhao
Keyword(s):  
Corrosion Protection ◽  
Corrosion Behavior ◽  
Sea Water ◽  
Electrochemical Impedance ◽  
Water Solution ◽  
Electrochemical Corrosion ◽  
Artificial Seawater ◽  
Protection Effect ◽  
Aluminum Sheets ◽  
Electrochemical Corrosion Behavior

Sea water resources are extensive and can be used to extinguish fires, but their corrosiveness is a major problem. Using the method of electrochemical workstation, the electrochemical corrosion behavior of aluminum sheet in artificial sea water solution and silica-coated artificial seawater was studied; by analyzing the surface morphology, polarization curve and electrochemical impedance spectroscopy, the electrochemical corrosion behavior of aluminum sheets under different immersion times and different immersion media is obtained. The conclusion is that the coating of nanosilica powder has a certain corrosion protection effect on artificial seawater.

Preparation and Corrosion Protection Effect of Electroactive Polyurethane Containing Amino-Capped Aniline Trimer

2010 ◽  
Vol 123-125 ◽  
pp. 1255-1258
Author(s):  
Chih Wei Peng ◽  
Jui Ming Yeh
Keyword(s):  
Corrosion Protection ◽  
Corrosion Potential ◽  
Electrochemical Impedance ◽  
Corrosion Current ◽  
Passive Layer ◽  
Visible Absorption ◽  
Protection Effect ◽  
Reversible Redox ◽  
Cold Rolled ◽  
Uv Visible

Electroactive polyurethane (EPU) containing conjugated segments of electroactive amino-capped aniline trimer (ACAT) has been successfully synthesized and characterized through Fourier-Transformation infrared and UV–visible absorption spectroscopy. Subsequently, electroactivity (i.e., redox capability) of as-prepared EPU was investigated by electrochemical cyclic voltammetry (CV) studies. It was noticed that the as-prepared EPU exhibited reversible redox capability was found to reveal better corrosion protection effect on cold-rolled steel (CRS) electrodes than that of non-electroactive polyurethane based on a series of electrochemical measurements such as corrosion potential, polarization resistance, corrosion current and electrochemical impedance spectroscopy (EIS) studies in 5 wt-% NaCl electrolyte. This significant enhancement of corrosion protection on CRS electrodes as compared to non-electroactive polyurethane might be probably ascribed to the redox catalytic property of as-prepared EPU coatings inducing the formation of passive layer of metal oxide, as evidenced by the SEM and ESCA studies.

scholarly journals A Novel Electroactive Imide Oligomer and Its Application in Anticorrosion Coating

Polymers ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 91 ◽  
Author(s):  
Bi-Sheng Huang ◽  
Guan-Hui Lai ◽  
Ta-I Yang ◽  
Mei-Hui Tsai ◽  
Yi-Chen Chou
Keyword(s):  
Corrosion Protection ◽  
Photoelectron Spectroscopy ◽  
Electrochemical Impedance ◽  
Surface Condition ◽  
Electrochemical Corrosion ◽  
Extended Period ◽  
Corrosion Current ◽  
Metal Corrosion ◽  
Superior Corrosion Resistance ◽  
Passive Metal

A novel aniline tetramer (AT) capped electroactive imide oligomer (EIO) for metal corrosion protection was successfully synthesized in this study. The chemical structure of the EIO was characterized by liquid chromatography-mass spectrometry and Fourier-transform infrared spectroscopy. Furthermore, the redox behavior of EIO was identified using electrochemical cyclic voltammetry studies. An EIO coated on a cold-rolled steel (CRS) electrode was found to possess superior corrosion resistance to polyimide (PI) on a series of electrochemical corrosion measurements in 3.5 wt.% NaCl solution over an extended period (30 days). The mechanism for the advanced corrosion protection of the PI coating on the CRS electrode could be attributed to the redox catalytic capabilities of the AT units present in the EIO. These capabilities may induce the formation of passive metal oxide layers on the CRS electrode. Scanning electron microscopy and X-ray photoelectron spectroscopy were used to analyze the surface condition of the CRS after the corrosion test. EIO- and PI-coated electrodes were identified by a series of electrochemical measurements, including corrosion potential (Ecorr), polarization resistance (Rp), and corrosion current (Icorr) measurements, along with electrochemical impedance spectroscopy (EIS).

Study on the Preparation and Properties of the PVA/SiO2 Hybrid Coating on BOPP Film via Sol-Gel Process

2011 ◽  
Vol 239-242 ◽  
pp. 1956-1959 ◽  
Author(s):  
Li Jing Zhu ◽  
Jia Jun Wang ◽  
Li Guo ◽  
Jie Shen
Keyword(s):  
Water Vapor ◽  
Sol Gel ◽  
Composite Films ◽  
Hybrid Coating ◽  
Barrier Property ◽  
Oxygen Barrier ◽  
Water Vapor Barrier ◽  
Biaxially Oriented Polypropylene ◽  
Sol Gel Process ◽  
Oxygen Barrier Property

In order to improve the barrier property of the biaxially oriented polypropylene (BOPP) film, the PVA/SiO2organic-inorganic hybrid coating on BOPP film was prepared by the sol–gel method. And the structure and properties of the hybrid composite films were characterized. The results showed that, the oxygen barrier property of the composite films was enhanced with the increase of PVA content, while the water vapor barrier property of the composite films was dropped. As the mass ratio of PVA increased to 80%, the oxygen barrier property of the composite films was 308 times that of the pure BOPP film, however, water vapor barrier character was half of the BOPP film.

Electrochemical investigations on the corrosion protection effect of poly(vinyl carbazole)-silica hybrid sol-gel materials

2011 ◽  
Vol 33 (2) ◽  
pp. 275-281 ◽  
Author(s):  
Tai-Hung Kuo ◽  
Chang-Jian Weng ◽  
Chi-Lun Chen ◽  
Ya-Lun Chen ◽  
Chi-Hao Chang ◽  
...  
Keyword(s):  
Corrosion Protection ◽  
Sol Gel ◽  
Protection Effect ◽  
Silica Hybrid

Preparation and properties of a long time durable superhydrophilic titanium dioxide film obtained by a sol-gel process

2017 ◽  
Vol 59 (1) ◽  
pp. 81-85
Author(s):  
Jianjun Zhang ◽  
Hao Zeng ◽  
Chun Liu ◽  
Chao Li ◽  
Sude Ma ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Sol Gel ◽  
Titanium Dioxide Film ◽  
Sol Gel Process ◽  
Long Time ◽  
Dioxide Film
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