Preparation and evaluation of nanosized mixed calcium iron oxide (CaFe2O4) as high heat resistant pigment in paints

2015 ◽  
Vol 44 (3) ◽  
pp. 172-178 ◽  
Author(s):  
H. Abd El-Wahab ◽  
A.M. Hassan ◽  
A.M. Naser ◽  
O.A. Fouad ◽  
A.M. El-Din ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Iron Oxide ◽  
Elevated Temperatures ◽  
Paint Film ◽  
High Heat ◽  
Mechanical Resistance ◽  
Inorganic Pigment ◽  
Content Type ◽  
Heat Resistant ◽  
Calcium Iron

Purpose – The purpose of this paper was to prepare and evaluate a nanosized mixed calcium iron oxide as a high heat-resistant pigment. Heat-resistant pigments can be defined as chemical substances that impart color to a substrate or binder and retain their color and finish at elevated temperatures. Mixed metal oxides have been widely used as pigments in coating formulations. Design/methodology/approach – This work presents synthesis of nanosized calcium iron oxide as an inorganic pigment by using simple synthesis technique, namely, solid-state calcination method, to study its heat and corrosion resistance. The prepared pigment was characterized by using X-ray diffraction, infrared spectroscopy, scanning electron microscopy and inductive coupling plasma. It was incorporated into paint formulations, and the heat, corrosion and mechanical resistance of dry paint film was evaluated. Findings – In this work, the prepared calcium iron oxide pigment showed excellent heat and corrosion resistance. Research limitations/implications – Heat-resistant coatings are required for industrial applications, mainly for reactors, exhaust pipes, space craft, stacks and similar equipments that are permanently and occasionally exposed to elevated temperatures. It was previously quite difficult to formulate heat-resistant organic coatings because of binder deficiencies; new vehicles for such applications are now available. Thus, the development of silicon resins has markedly advanced the utility of heat-resistant paints. High-temperature pigments are inorganic chemical compounds that impart and retain their color and finish to a substrate or binder at elevated temperatures. Practical implications – The nanosized mixed calcium iron oxide could be used as a pigment in paint formulations. It was found that it significantly enhances the heat, corrosion and mechanical resistance. It can also find numerous applications in other paint formulations for surface coating. Originality/value – The paper shows how the pigment consisting nanosized mixed calcium iron oxide could be used in heat-resistant paint formulations for coating metal surfaces.

Effects of interrupted aging on the intergranular corrosion behavior of Al–Cu–Mg–Ag heat-resistant alloy

2016 ◽  
Vol 13 (6) ◽  
pp. 476-481 ◽  
Author(s):  
Ruijie Zhang ◽  
Xiaoyan Liu ◽  
Zhaopeng Wang ◽  
Fei Gao
Keyword(s):  
Corrosion Resistance ◽  
Grain Boundary ◽  
Grain Boundaries ◽  
Corrosion Behavior ◽  
Intergranular Corrosion ◽  
Al Alloy ◽  
Content Type ◽  
Heat Resistant Alloy ◽  
Resistant Alloy ◽  
Heat Resistant

Purpose The purpose of this study is to research the effects of interrupted aging on the corrosion behavior of Al–Cu–Mg–Ag heat-resistant alloy by means of intergranular corrosion (IGC) testing, potentiodynamic polarization combined with optical microscopy and transmission electron microscopy. Design/methodology/approach The results show that the IGC began on the grain boundaries and continued along the grain boundary. The corrosion resistance property of Al–Cu–Mg–Ag alloy was enhanced by interrupted aging. The precipitations of the interrupted aged sample both in the grains and on the grain boundaries were fine, and the chain-like phases on the grain boundary were distributed nearly continuously. Findings The corrosion resistance of Al–Cu–Mg series Al alloy with equilibrium phase (Al2Cu) is notably determined by precipitation-free zone (PFZ) as the self-corrosion potentials of (Al2Cu), PFZ and the matrix satisfied the relation EPFZ < Eθ<EMatrix. Originality/value The connections of the PFZ on both sides of the grain boundary decreased the corrosion resistance of Al–Cu–Mg–Ag alloy treated by the single aging.

Surface modification of iron oxide (Fe2O3) pigment particles with amino-functional polysiloxane for improved dispersion stability and hydrophobicity

2014 ◽  
Vol 43 (4) ◽  
pp. 219-227 ◽  
Author(s):  
Sushilkumar A. Jadhav ◽  
Roberta Bongiovanni ◽  
Daniele L. Marchisio ◽  
Daniela Fontana ◽  
Christian Egger
Keyword(s):  
Surface Modification ◽  
Iron Oxide ◽  
Light Scattering ◽  
Photoelectron Spectroscopy ◽  
Particle Surface ◽  
Dispersion Stability ◽  
Spectroscopic Techniques ◽  
Concentrated Suspensions ◽  
Inorganic Pigment ◽  
Content Type

Purpose – The purpose of the present study is to use an amino-functional polysiloxane for the surface modification of red iron oxide (Fe2O3) pigment particles for their improved dispersion stability and hydrophobicity and to study the chemical interactions of polysiloxanes with the particle surface. Design/methodology/approach – Surface-treated red Fe2O3 pigment particles were prepared by treatment of the particles with different quantities of the (aminopropylmethylsiloxane)-dimethylsiloxane copolymer in concentrated suspensions in water. The samples were analysed with different instrumental and spectroscopic techniques to study the interaction of the polysiloxane with the particle surface and the effect of the surface treatment of the particles on their dispersion stability and hydrophobicity. Findings – Chemisorption of the amino-polysiloxane onto the surface of Fe2O3 particles resulted in stable layers which turned out to be helpful in improving greatly the dispersion stability of the particles as shown by the Static Light Scattering and Dynamic Light Scattering results. Formation of a polysiloxane coating onto the surface of the pigment particles was confirmed by studying the interactions of the polymer molecules with Fe2O3 surfaces by Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy techniques. Practical implications – The surface-treated red Fe2O3 particles with improved dispersion stability can be important components of various formulations in applications such as the colouring of the cement or inorganic pigment-based paint formulations. Originality/value – The study provides mechanistic insights about the interactions of amino-polysiloxane with the red Fe2O3 particles. The process of surface modification of red Fe2O3 particles with the amino-functional polysiloxane showed increased hydrophobicity and dispersion stability which is an important requirement of the pigment-based formulations in real applications.

Obtaining TiO2 and Fe2O3 from Ilmenite via Alkaline Fusion Method

2020 ◽  
Vol 1010 ◽  
pp. 385-390
Author(s):  
Roshasnorlyza Hazan ◽  
Muhammad Azri Muhamad Yusop ◽  
Wilfred Paulus ◽  
Mohamed Takip Khaironie
Keyword(s):  
Iron Oxide ◽  
Elevated Temperatures ◽  
Oxygen Carrier ◽  
Extractive Metallurgy ◽  
Oxide Phase ◽  
Mechanical Resistance ◽  
Precipitation Mechanism ◽  
Suitable Material ◽  
Natural Minerals ◽  
The Growth Of Economy

Tin mining business in Malaysia produce many types of by product such as xenotime, monazite, zircon and ilmenite. Ilmenite is one of the crucial materials that helps the growth of economy in Malaysia. Instead of that, ilmenite becomes an important material in the process of oxygen carrier where it shows a better compare to the other such as olivine, hematite, biotite and cuprite. Incredible mechanical resistance and good thermal properties are playing an important factor for the materials that been used for oxygen carrier and ilmenite is the most suitable material for oxygen carrier process. Instead of its suitable properties, ilmenite also one of the lowest price materials among natural minerals sources. Ilmenite composition can provide titanium dioxide (TiO2) which can be used in many industries such as painting and iron oxide (Fe2O3 or Fe3O4) for catalytic and magnetic industries. TiO2 can be found in three phases which are anatase, rutile and brookite. In order to obtain TiO2, dissolution – precipitation mechanism where titanium arranges into different crystal structure depending on the reactant chemistry. These phase formations were obtained by using hydrothermal treatment at elevated temperatures with the appropriate reactants. The transition temperature and the mechanism of the structural transformation also can be largely influenced the iron oxide phase. Therefor in this study, extractive metallurgy method was used in order to obtain separate TiO2 and Fe2O3.

UDIMET 520

Alloy Digest ◽  
1962 ◽  
Vol 11 (9) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Surface Treatment ◽  
Tensile Properties ◽  
Elevated Temperatures ◽  
Base Alloy ◽  
High Strength ◽  
Heat Treating ◽  
Nickel Base Alloy ◽  
Nickel Base

Abstract UDIMET 520 is a nickel-base alloy recommended for applications where high strength at elevated temperatures is required. It is suitable for service at temperatures up to 1800 F. This datasheet provides information on composition, physical properties, and tensile properties as well as creep. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Ni-74. Producer or source: Special Metals Inc..

WIELAND-K88

Alloy Digest ◽  
2005 ◽  
Vol 54 (12) ◽  
Keyword(s):  
Thermal Conductivity ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Stress Relaxation ◽  
Copper Alloy ◽  
Elevated Temperatures ◽  
Heat Treating ◽  
Relaxation Resistance ◽  
Temperature Performance ◽  
Very High

Abstract Wieland K-88 is a copper alloy with very high electrical and thermal conductivity, good strength, and excellent stress relaxation resistance at elevated temperatures. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: CU-738. Producer or source: Wieland Metals Inc.

BRUSH ALLOY 3

Alloy Digest ◽  
1983 ◽  
Vol 32 (3) ◽  
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Corrosion Resistance ◽  
Physical Properties ◽  
Copper Alloy ◽  
Elevated Temperatures ◽  
Physical And Mechanical Properties ◽  
Heat Treating ◽  
Good Resistance ◽  
Good Corrosion Resistance

Abstract BRUSH Alloy 3 offers the highest electrical and thermal conductivity of any beryllium-copper alloy. It possesses an excellent combination of moderate strength, good corrosion resistance and good resistance to moderately elevated temperatures. Because of its unique physical and mechanical properties, Brush Alloy 3 finds widespread use in welding applications (RWMA Class 3), current-carrying springs, switch and instrument parts and similar components. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fatigue. It also includes information on corrosion resistance as well as casting, forming, heat treating, machining, joining, and surface treatment. Filing Code: Cu-454. Producer or source: Brush Wellman Inc..

RIO TINTO ALLOY 242.2

Alloy Digest ◽  
2020 ◽  
Vol 69 (4) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Shear Strength ◽  
Physical Properties ◽  
Elevated Temperatures ◽  
High Strength ◽  
Casting Alloy ◽  
Permanent Mold ◽  
Rio Tinto ◽  
Permanent Mold Castings ◽  
Río Tinto

Abstract Rio Tinto Alloy 242.2 is a heat-treatable, aluminum-copper-magnesium-nickel casting alloy. It is available in the form of ingots to be remelted for the manufacture of sand and permanent mold castings. Alloy 242.0 is used extensively for applications requiring high strength and hardness at elevated temperatures. This datasheet provides information on composition, physical properties, elasticity, tensile properties, and shear strength as well as fatigue. It also includes information on corrosion resistance as well as casting, machining, and joining. Filing Code: Al-463. Producer or source: Rio Tinto Limited.

CRONIFER II EXTRA, CRONIFER 45, CRONIFER III EXTRA, CRONIFER IV EXTRA

Alloy Digest ◽  
1992 ◽  
Vol 41 (6) ◽  
Keyword(s):  
Physical Properties ◽  
Tensile Properties ◽  
High Heat ◽  
Heat Resistant

Abstract CRONIFER II EXTRA, 45, III EXTRA AND IV EXTRA alloys are high heat resistant alloys, some with resistance to green rot and hardening environments. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. Filing Code: Ni-405. Producer or source: VDM Technologies Corporation.

UDIMET 105

Alloy Digest ◽  
1972 ◽  
Vol 21 (7) ◽  
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Surface Treatment ◽  
Elevated Temperatures ◽  
Base Alloy ◽  
Heat Treating ◽  
Nickel Base Alloy ◽  
Temperature Performance ◽  
Nickel Base

Abstract UDIMET 105 is a nickel-base alloy which was developed for service at elevated temperatures. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as creep. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Ni-175. Producer or source: Special Metals Corporation.

IN-102

Alloy Digest ◽  
1969 ◽  
Vol 18 (9) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Elevated Temperatures ◽  
Iron Alloy ◽  
High Strength ◽  
Heat Treating ◽  
High Ductility ◽  
International Nickel Company ◽  
Nickel Chromium ◽  
Temperature Performance ◽  
High Degree

Abstract IN-102 is a nickel-chromium-iron alloy designed for long service at temperatures up to 1300 F. It combines high strength and high ductility at the elevated temperatures with a high degree of structural stability. It is used for aerospace, power and steam turbine components. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as creep. It also includes information on low and high temperature performance, and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Ni-147. Producer or source: International Nickel Company Inc..

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