Microstructure and Erosion-Corrosion Behavior of Hot-Dipping Al-Mn Alloy Coatings on Low Carbon Steel

2011 ◽  
Vol 266 ◽  
pp. 246-249
Author(s):  
Xin Mei Li ◽  
Ping Kuan Lu ◽  
Qiang Hu ◽  
Xiao Feng Dong ◽  
Bei Jing Fang
Keyword(s):  
Carbon Steel ◽  
Corrosion Behavior ◽  
Layer Structure ◽  
Steel Substrate ◽  
Low Carbon Steel ◽  
Alloy Layer ◽  
Low Carbon ◽  
Good Adhesion ◽  
Erosion Corrosion ◽  
Aluminide Layer

Low carbon steel was coated by hot-dipping into a molten bath containing Al-2 wt.%Mn. The phase composition, morphology and the erosion-corrosion behavior of the aluminide layer were characterized by XRD, OM, SEM and erosion-corrosion tester, respectively. The results show that the coatings are mainly composed of Al, FeAl3, Fe2Al5 and MnAl6 phase. The coatings consist of two-layer structure, i.e., toplayer Al-Mn alloy layer and tongue-like intermetallic compound. The thickness of the coating layer is about 800 μm and all the coating layers show good adhesion to the steel substrate. Compared with the pure Al coatings, the Al-Mn alloy coatings exhibit lower wear rate irrespective of the rotation speed. The hot-dipped Al-Mn coatings possess considerable erosion-corrosion resistance.

scholarly journals Corrosion Behavior of Laser-clad Mo2NiB2 Cermet Coating on Low Carbon Steel Substrate

2015 ◽  
Vol 55 (7) ◽  
pp. 1460-1467
Author(s):  
Qianlin Wu ◽  
Wenge Li ◽  
Ning Zhong ◽  
Chunhua Fan ◽  
Boyang Liu
Keyword(s):  
Carbon Steel ◽  
Corrosion Behavior ◽  
Steel Substrate ◽  
Low Carbon Steel ◽  
Low Carbon ◽  
Cermet Coating

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.

Prepartion of Al-Mn Alloy Coatings on Low Carbon Steel by Hot-Dip-Aluminizing

2011 ◽  
Vol 117-119 ◽  
pp. 1121-1124 ◽  
Author(s):  
Xin Mei Li ◽  
Bing Liu ◽  
Xiao Feng Dong ◽  
Qing Yu ◽  
Qiao Yu Xu
Keyword(s):  
Phase Composition ◽  
Carbon Steel ◽  
Intermetallic Compound ◽  
Coating Layer ◽  
Low Carbon Steel ◽  
Alloy Layer ◽  
Low Carbon ◽  
Molten Bath ◽  
Coating Layers ◽  
Aluminide Layer

Low carbon steel were coated by hot-dipping into a molten bath containing Al-2 wt%Mn, Al-9wt%Mn, Al-13wt%Mn, respectively. The phase composition, morphology and the adhesion of the aluminide layer were characterized by XRD, SEM, EDAX, OM and scratch tester. The results show that the coating layers is mainly composed of Al, FeAl3, Fe2Al5 and MnAl6 phase. The coatings consists of two-layers structure, i.e., topcoat Al-Mn alloy layer and tongue-like intermetallic compound, and the coating layer is about 800 μm thick. The adhesion of the Al-Mn alloy coatings were characterized by Lc value and were found to be about ~30N. The adhesion gradually decrease with the increase of the Mn contents in alloy coatings.

Effects of Dipping Pretreatment on the Flame Deposition of Carbon Nanostructure on the Low Carbon Steel Substrate

2013 ◽  
Vol 734-737 ◽  
pp. 2269-2272
Author(s):  
Hong Mei Zhu ◽  
Shu Mei Lei ◽  
Tong Chun Kuang
Keyword(s):  
Nitric Acid ◽  
Carbon Steel ◽  
Acid Solution ◽  
Carbon Nanofibers ◽  
Carbon Nanoparticles ◽  
Steel Substrate ◽  
Low Carbon Steel ◽  
Low Carbon ◽  
Carbon Nanostructure ◽  
Flame Method

In this paper, a low carbon steel was used as the substrate to prepare the carbon nanostructural materials by the oxygen-acetylene flame method. The experimental results show that the composite products including nodular carbon nanoparticles and amorphous carbon were obtained on the substrate after a mechanical polishing pretreatment. Comparatively, the short tubular carbon nanofibers with the diameter of around 100 nm were deposited on the substrate pretreated by dipping in the concentrated nitric acid solution. The possible mechanism for the growth of such carbon nanofibers was discussed.

scholarly journals The Microstructure of Annealed Galfan Coating on Steel Substrate

2012 ◽  
Vol 57 (2) ◽  
pp. 517 ◽  
Author(s):  
M. Żelechower ◽  
J. Kliś ◽  
E. Augustyn ◽  
J. Grzonka ◽  
D. Stróż ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Electron Diffraction ◽  
Steel Substrate ◽  
Low Carbon Steel ◽  
Alloy Coating ◽  
Annealed Sample ◽  
Low Carbon ◽  
Interface Area ◽  
Two Phase ◽  
Al Content

The Microstructure of AnnealedGalfanCoating on Steel SubstrateThe commercially availableGalfancoating containing 5-7wt.% of Al deposited on the low carbon steel substrate by hot dipping has been examined with respect to the microstructure of the coating/substrate interface area. The application of several experimental techniques (SEM/EDS, XRD, TEM/AEM/EDS/ED) allowed demonstrating the two-phase structure of the alloy coating in non-treated, commercially availableGalfansamples: Zn-rich pre-eutectoidηphase grains are surrounded by lamellar eutectics ofβ-Al andη-Zn. The transition layer between the alloy coating and steel substrate with the considerably higher Al content (SEM/EDS, TEM/EDS) has been found in both non-treated and annealed samples (600°C/5 minutes). Only the monoclinic FeAl3Znxphase however was revealed in the annealed sample (TEM/electron diffraction) remaining uncertain the presence of the orthorhombic Fe2Al5Znxphase, reported by several authors.

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