High Temperature Oxidation Effect on the Dissolution Rate of Hot-Dip Aluminized Steel in Aluminum Melt

2014 ◽  
Vol 970 ◽  
pp. 248-251
Author(s):  
Ayeh Mohsenifar ◽  
Mohammad Reza Aboutalebi ◽  
S. Hossein Seyedein
Keyword(s):  
High Temperature ◽  
Dissolution Rate ◽  
High Temperature Oxidation ◽  
Molten Aluminum ◽  
Low Carbon Steel ◽  
Isothermal Oxidation ◽  
Coated Sample ◽  
Low Carbon ◽  
Temperature Oxidation ◽  
Oxidation In Air

Hot dip aluminizing of low carbon steel followed by high temperature oxidation in air was carried out to evaluate the dissolution rate of coated sample in molten aluminum. The microstructure of oxide and aluminide layers was investigated using scanning electron microscopy and X-ray diffraction methods. The characterization of the coating showed that Fe2Al5 has been the major phase formed on the surface of specimen before high temperature oxidation. Isothermal oxidation of the coating as resulted in the formation of Al2O3 while Fe2Al5 phase transformed into FeAl and Fe3Al phases. The coated samples were further subjected to corrosion in molten aluminum. It was proved that the oxide layer formed on the coating and developed FeAl and Fe3Al intermetallic phases play the major role in protecting the specimen from corrosion in molten aluminum.

The High-Temperature Oxidation Behavior of the Fe-Ni Based Alloy Coating Produced by Plasma Cladding

2011 ◽  
Vol 189-193 ◽  
pp. 781-785
Author(s):  
Li Min Zhang ◽  
Bang Wu Liu
Keyword(s):  
High Temperature ◽  
High Temperature Oxidation ◽  
Oxidation Behavior ◽  
Low Carbon Steel ◽  
Alloy Coating ◽  
Isothermal Oxidation ◽  
Low Carbon ◽  
Temperature Oxidation ◽  
Oxidation Test ◽  
Plasma Cladding

In the paper the efficient and low-cost plasma cladding technique has been used to prepare Fe-Ni based alloy coatings on the surface of low carbon steel. The high-temperature isothermal oxidation behavior of the specimens has been tested at 700 °C and 800 °C in air using an electrical furnace for 100 h. The elements distribution, phase composition, and morphology of the alloy coatings after the oxidation test have been characterized by SEM/EDS and XRD. Isothermal oxidation test show that the Fe-Ni based alloy coating has excellent high temperature oxidation resistance at 700 °C and 800 °C. The oxidation rate of Fe-Ni based coating at 800 °C is higher than that of at 700 °C. At 800 °C, the oxidation kinetics basically follows the parabolic rate law before 80 h. A protective Fe0.99Fe1.97Cr0.03Ni0.01O4 and Cr1.3Fe0.7O3 based oxide film has been formed on the surface of the coating after oxidation.

scholarly journals High temperature oxidation and corrosion of spark plasma sintered FeCrAlTiY-10 mass% MoSi2 coating on low carbon steel

2020 ◽  
Author(s):  
Januaris Pane ◽  
Dedi Holden Simbolon ◽  
Bambang Hermanto ◽  
Kerista Sebayang ◽  
Marhaposan Situmorang ◽  
...  
Keyword(s):  
High Temperature ◽  
Carbon Steel ◽  
High Temperature Oxidation ◽  
Low Carbon Steel ◽  
Low Carbon ◽  
Temperature Oxidation ◽  
Spark Plasma ◽  
Mosi2 Coating ◽  
Oxidation And Corrosion

Microstructure and Oxidation of 55%Al-Zn-Si Hot-Dip Coatings Deposited on Low Carbon Steel at High Temperature

2011 ◽  
Vol 399-401 ◽  
pp. 1998-2003 ◽  
Author(s):  
Biao Zhou ◽  
Feng Jin ◽  
Qun Luo ◽  
Qian Li ◽  
Kuo Chih Chou
Keyword(s):  
High Temperature ◽  
High Temperature Oxidation ◽  
Diffusion Rate ◽  
Intermetallic Layer ◽  
Low Carbon Steel ◽  
Low Carbon ◽  
X Ray Diffraction ◽  
Temperature Oxidation ◽  
X Ray ◽  
Good Agreement

The high temperature oxidation and microstructure evolution of 55%Al-Zn-Si coated sheets were studied by scanning electron microscopy (SEM) and X-ray diffraction (XRD). After oxidation, the coatings consisted of three phases including ZnO, Fe2Al5, and FeAl from topcoat to the substrate. The different diffusion rate of Fe and Al result in forming voids at the interface of intermetallic layer and the substrate. A good agreement has been reached between the experimental data and the calculation from Chou diffusion model, which has a good predicted function. Moreover, the characteristic oxidation time and the apparent activation energy were obtained.

scholarly journals High Temperature Oxidation of Ultra-Low-Carbon Steel

2006 ◽  
Vol 258-260 ◽  
pp. 158-163 ◽  
Author(s):  
Lucia Suarez ◽  
R. Coto ◽  
X. Vanden Eynde ◽  
M. Lamberigts ◽  
Yvan Houbaert
Keyword(s):  
High Temperature ◽  
Carbon Steel ◽  
High Temperature Oxidation ◽  
Low Carbon Steel ◽  
Controlled Atmosphere ◽  
Low Carbon ◽  
Strip Surface ◽  
Temperature Oxidation ◽  
Scale Thickness ◽  
Ultra Low Carbon Steel

An oxide scale layer always forms at the strip surface during the hot rolling process. Its properties have a large impact on surface quality. The most important features of the oxide layer are its thickness, composition, structure, adherence and coherence. Temperature, time and gas atmosphere determine the growth of oxide layers. In this paper, the high temperature oxidation properties of ultra low carbon steels are discussed in terms of oxide growth mechanism, kinetics and phase morphology. The oxidation kinetics of ultra-low carbon steel (ULC) in air, its scale structure and composition were investigated over the temperature range 923-1473K. Oxidation experiments were performed either under controlled atmosphere or in air, to analyse the oxidation process during strip production. A first series of experiments was carried out in an electric furnace at temperatures ranging from 923 to 1473K, for times between 16 and 7200s. A second series was carried out in a device especially designed to control the atmosphere. After heating under pure nitrogen, the samples were oxidised in air at temperatures between 923-1323K for various oxidation times. Thus treated specimens were characterised by metallography and their scale thickness was measured under the optical microscope. Scale morphology was studied and scale composition confirmed by EDS (Energy Dispersive Spectroscopy) and EBSD (Electron Backscattered Diffraction) analysis. Results show that scale growth under controlled atmosphere is significantly faster than under non controlled conditions, additionally the adherence of the scale formed in the laboratory device was significantly better than the other one. It is clear that scale thickness and constitution depend strongly on the oxidation potential of atmosphere. Computed parabolic activation energies (Ea) values are in good agreement with those found in the literature.

Microstructure and High Temperature Oxidation of the Hot-Dipping Al-Si Coating on Low Carbon Steel in Ethanol, Water Vapor and Air at 700°C

2009 ◽  
Vol 79-82 ◽  
pp. 1775-1778 ◽  
Author(s):  
Mohammad Badaruddin ◽  
Chaur Jeng Wang
Keyword(s):  
Water Vapor ◽  
High Temperature ◽  
Carbon Steel ◽  
High Temperature Oxidation ◽  
Steel Substrate ◽  
Low Carbon Steel ◽  
Composition Gradient ◽  
Low Carbon ◽  
Temperature Oxidation ◽  
Aluminide Layer

Low carbon steel was coated by hot-dipping into a molten Al-10%Si bath. The high-temperature oxidation was performed at 700oC for 1 h to 49 h in air, air +100% H2O, and air + 30% ethanol under atmospheric pressure. An elemental composition distribution, morphologies of the aluminide layer and the oxide scale were characterized by OM, XRD, and SEM/EDS. After hot-dipping treatment, the coating layers consisted of Al, Si, FeAl3, τ5-Fe2Al8Si, and Fe2Al5. The results of high temperature oxidation tests showed the oxidation rate were parabolic law in three different atmospheres. The polyhedral τ1-(Al,Si)5Fe3 formed at a short time oxidation completely transformed to FeAl2 and FeAl due to the composition gradient and the chemical diffusion. The effect of water vapor on the oxidation resistance of the Al-Si coating may be attributed to increase in Al and Fe ions transport, leading to loss of protective aluminide layer by formation of iron oxide nodules on the coating surface and at interface between aluminide layer and the steel substrate.

The High Temperature Oxidation Behavior of Hot-Dip Aluminized GH169

2014 ◽  
Vol 900 ◽  
pp. 87-91
Author(s):  
Jin Lou ◽  
Cheng Xiang Ruan
Keyword(s):  
High Temperature ◽  
High Temperature Oxidation ◽  
Oxidation Behavior ◽  
Molten Aluminum ◽  
Isothermal Oxidation ◽  
Resistance Furnace ◽  
Temperature Oxidation ◽  
Parabolic Law ◽  
Aluminized Steel ◽  
High Temperature Oxidation Behavior

GH169 was coated by hot-dipping in a molten aluminum bath, and then diffusing annealing at 950 °C for 2 h. The high temperature isothermal oxidation behavior of the hot-dipped aluminized alloy and GH169 was tested at 900 °C for 100 h using resistance furnace. The surface morphology and phase composition of the oxide scale were studied by SEM and EDS. The result of high temperature oxidation test showed that oxidation curves of hot-dipped aluminized steel and GH169 followed parabolic law at 900 °C for 100h and the hot-dipped aluminum present more excellent anti-oxidation. A dense film formed on GH169 mainly composed of Cr2O3and TiO2while on hot-dipped aluminized steel is Al2O3.

High-temperature oxidation of Q235 low-carbon steel treated by plasma electrolytic borocarburizing

2015 ◽  
Vol 269 ◽  
pp. 302-307 ◽  
Author(s):  
Bin Wang ◽  
Jie Wu ◽  
Yifan Zhang ◽  
Zhenglong Wu ◽  
Yongliang Li ◽  
...  
Keyword(s):  
High Temperature ◽  
Carbon Steel ◽  
High Temperature Oxidation ◽  
Low Carbon Steel ◽  
Low Carbon ◽  
Temperature Oxidation ◽  
Plasma Electrolytic
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