Means of increasing corrosion resistance of titanium enamel coating

1981 ◽  
Vol 38 (8) ◽  
pp. 437-438
Author(s):  
V. A. Svetlov ◽  
N. P. Bovkun
Keyword(s):  
Corrosion Resistance ◽  
Enamel Coating ◽  
Titanium Enamel

Corrosion Behavior of Enamel Coated Steel Rebar by EIS

2012 ◽  
Vol 450-451 ◽  
pp. 445-453 ◽  
Author(s):  
Fu Jian Tang ◽  
Gen Da Chen ◽  
Jeffery S. Volz ◽  
Richard K. Brow ◽  
Michael Koenigstein
Keyword(s):  
Corrosion Resistance ◽  
Pore Structure ◽  
Enamel Coating ◽  
Surface Condition ◽  
Corrosion Process ◽  
Coated Steel ◽  
Nacl Solution ◽  
Steel Rebar ◽  
Interconnected Pore ◽  
Interconnected Pore Structure

In this study, the corrosion process of enamel-coated deformed rebar completely immersed in 3.5 wt.% NaCl solution was evaluated over a period of 84 days by EIS testing. Three types of enamel coating were investigated: pure enamel, 50/50 enamel coating, and double enamel. Surface condition of the enamel coatings that were intentionally damaged prior to corrosion tests was visually examined at different immersion times. After 84 days of testing, the damaged coating areas were characterized by SEM, and the corrosion products on and adjacent to the damaged areas were collected and analyzed by XRD. Corrosion initiated at the damaged locations with no undercutting of the coating observed. The 50/50 enamel coating had the least corrosion resistance, due to its interconnected pore structure, and prior damage drastically reduced the corrosion resistance of pure and double enamel coated rebar.

scholarly journals Corrosion Resistance of Pipeline Steel with Damaged Enamel Coating and Cathodic Protection

Coatings ◽  
2018 ◽  
Vol 8 (5) ◽  
pp. 185 ◽  
Author(s):  
Liang Fan ◽  
Signo Reis ◽  
Genda Chen ◽  
Michael Koenigstein
Keyword(s):  
Corrosion Resistance ◽  
Cathodic Protection ◽  
Enamel Coating ◽  
Pipeline Steel

Increasing the corrosion resistance of titanium enamel coatings

1982 ◽  
Vol 39 (7) ◽  
pp. 356-357
Author(s):  
V. A. Svetlov ◽  
A. A. Perminov ◽  
N. P. Bovkun
Keyword(s):  
Corrosion Resistance ◽  
Titanium Enamel

scholarly journals Protective and decorative properties of titanium glass enamels

2020 ◽  
pp. 33-37
Author(s):  
V.I. Goleus ◽  
◽  
T.I. Nahorna ◽  
R.I. Kyslychna ◽  
S.Yu. Naumenko ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Enamel Coating ◽  
Water Resistance ◽  
Total Content ◽  
Color Tone ◽  
Na2o Content ◽  
Titanium Enamel ◽  
Color Characteristics ◽  
Titanium Coatings ◽  
Coating Color

It is known that enamel coatings with enhanced protective and decorative properties can be fabricated on the basis of boron-silicate glass frits with an increased content of TiO2 in their composition. Opacity and white color of enamel coatings are due to their crystallization at firing temperatures. Titanium glass enamels are not pure white visually, and show yellow and blue shades depending on their chemical composition. The purpose of this work was to establish the influence of basic components on the water resistance and color characteristics of titanium enamel coatings. Our experimental study was focused on the glass frits with the chemical composition described by the generalized formula (76–n–m)SiO2nB2O3mNa2O24MexOy, where MexOy is the total content of TiO2, ZrO2, Al2O3, MgO, СaO, P2O5, and K2O. It was found that the glass frits with the following content of basic components (mol.%): Na2O 12–13, K2O 3, B2O3 10–11, SiO2 49–51 demonstrated the highest water-resistant properties. The color characteristics of titanium enamel coatings prepared on the basis of the mentioned glass frits differ significantly from the reference white light A; the titanium enamel coatings under consideration have a yellow-green tint. The highest deviations of the enamel coating color purity and color tone from a standard of white color were observed when increasing the Na2O content in the glass frits composition at the expense of SiO2. The color of titanium coatings with the highest water resistance has a deviation from the standard of white color within 4–6%.

scholarly journals Corrosion Resistance of a Sand Particle-Modified Enamel Coating Applied to Smooth Steel Bars

Materials ◽  
2014 ◽  
Vol 7 (9) ◽  
pp. 6632-6645 ◽  
Author(s):  
Fujian Tang ◽  
Genda Chen ◽  
Richard Brow ◽  
Michael Koenigstein
Keyword(s):  
Corrosion Resistance ◽  
Enamel Coating ◽  
Sand Particle ◽  
Steel Bars

Cement-modified enamel coating for enhanced corrosion resistance of steel reinforcing bars

2013 ◽  
Vol 35 (1) ◽  
pp. 171-180 ◽  
Author(s):  
Fujian Tang ◽  
Genda Chen ◽  
Jeffery S. Volz ◽  
Richard K. Brow ◽  
Michael L. Koenigstein
Keyword(s):  
Corrosion Resistance ◽  
Enamel Coating ◽  
Reinforcing Bars

A NOVEL METHOD FOR STUDYING THE CORROSION RESISTANCE AND MICROSTRUCTURE OF ENAMEL COATING MODIFIED ON HIGH-STRENGTH STEEL IN 3.5 wt.% NaCl SOLUTION

2019 ◽  
Vol 27 (02) ◽  
pp. 1950098
Author(s):  
YULIN LI ◽  
JUNJIE WANG ◽  
QINGDONG ZHONG
Keyword(s):  
Corrosion Resistance ◽  
High Strength Steel ◽  
Enamel Coating ◽  
Scanning Electrochemical Microscopy ◽  
High Strength ◽  
Nacl Solution ◽  
Analysis Technique ◽  
Different Temperatures ◽  
Potential Test ◽  
Electrochemical Microscopy

A new method was introduced to research the corrosion resistance of enamel coatings which were sintered at different temperatures in this paper. 1 – 4 Scanning electrochemical microscopy (SECM) conjunction with capacitance-potential test and Mott–Schottky analysis technique were used to study the coating failure process and semiconductor conduction behavior of enamel coating in 3.5[Formula: see text]wt.% NaCl solution. The high strength steel (SAPH440) was selected as the metal substrate. The coatings which were sintered at different temperatures on the high strength steel were analyzed and their corrosion behaviors and microstructures were also measured by potentiodynamic polarization curves, Mott–Schottky analysis technique and scanning electrochemical microscopy. 5 – 10 In this paper, five kinds of enamel coatings were prepared on high strength steel. The SECM results show that the Faraday current of the microprobe tip gradually decreases with the soaking time increasing, which indicates that the coatings become failure slowly with the invasion of water and aggressive ions. At the same time, the tip current was homogeneous during the immersion process, which reflected that the surface of the sample remained stable, no obvious bulges appeared. Capacitance–potential test and Mott–Schottky analysis 7 , 8 show that the external ions and water molecules gradually penetrate into the coating; coating showed characteristics of [Formula: see text]-type semiconductor as time increases, the capacitance increases gradually, the space charge layer thickness decreases, slope of Mott–Schottky curve decreased gradually which indicates that the failure of coating in the process of soaking slowly with the charge carrier density increases.

Morphology, Structure and Corrosion Resistance of Nano-Enamel Coating Changed on Ti-6Al-4V Alloy

2017 ◽  
Vol 893 ◽  
pp. 309-312
Author(s):  
Yu Lin Li ◽  
Zhe Rui Huang ◽  
Qing Dong Zhong ◽  
Chen Xiao ◽  
Hui Li ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Phase Composition ◽  
Mild Steel ◽  
Potentiodynamic Polarization ◽  
Enamel Coating ◽  
Open Circuit Potential ◽  
Sol Gel ◽  
Open Circuit ◽  
X Ray Diffraction ◽  
X Ray

Using a sol-gel method and impregnation technology to produce nanoenamel coating on polished Ti-6Al-4V alloy. The morphology, structure and phase composition of nanoenamel coatings modified on mild steel were identified with X-ray diffraction (XRD), scanning electro microscopy (SEM) and tested by some electrochemical methods, such as open circuit potential and potentiodynamic polarization testing [1]. All of these method can select the samples which perform the best corrosion resisitance.

scholarly journals Improving hot corrosion resistance of two phases intermetallic alloy α2-Ti3Al/γ-TiAl with enamel coating

2017 ◽  
Author(s):  
Muhammad Jajar Pambudi ◽  
Eddy Agus Basuki ◽  
Djoko Hadi Prajitno
Keyword(s):  
Corrosion Resistance ◽  
Hot Corrosion ◽  
Enamel Coating ◽  
Intermetallic Alloy ◽  
Two Phases

SECM APPLIED FOR RESEARCHING THE MICROSCOPIC MORPHOLOGY AND CORROSION BEHAVIOR OF ENAMEL COATING ON MILD STEEL IN AQUEOUS CHLORIDE SOLUTIONS

2018 ◽  
Vol 25 (05) ◽  
pp. 1850094
Author(s):  
Y. L. LI ◽  
Z. R. HUANG ◽  
Q. D. ZHONG ◽  
C. CHEN ◽  
Y. X. XU
Keyword(s):  
Corrosion Resistance ◽  
Mild Steel ◽  
Enamel Coating ◽  
Nacl Solution ◽  
Binding Force ◽  
Potentiodynamic Polarization Curves ◽  
Aqueous Chloride ◽  
Microscopic Morphology ◽  
Electrochemical Microscopy ◽  
Scanning Electron

The microstructures, morphology features and the corrosion resistance of the different particle diameters of enamel coating were investigated in this paper. All enamel coating samples were immersed in 5[Formula: see text]wt.% NaCl solution. The effects of the diameter of micron-dimension enamel particles on the mild steel were discussed and the corrosion resistance of the different coatings were characterized by potentiodynamic polarization curves, scanning electron microscopy (SEM) and scanning electrochemical microscopy (SECM), the SECM was employed to identify the local reactivity and then estimate where pittings happen. In this paper, six kinds of diameter of enamel particles were sintered at 780[Formula: see text]C on mild steel. The results indicated that the corrosion resistance of the enamel coating immersed in 5[Formula: see text]wt.% NaCl solution improved first and then declined with the decrease of particle size. Used by SEM and SECM, the result showed that as enamel particles become more small, the binding force becomes stronger. However, as the diameter of enamel particles decrease, the uniformity of the coating first improves and then decreases.

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