Effect of Mo Content on the Corrosion Resistance of Fe-Based Amorphous Composite Coating

2016 ◽  
Vol 849 ◽  
pp. 636-641
Author(s):  
Run Sen Jiang ◽  
Yong Tian Wang ◽  
Lin Hu ◽  
Gang Xu ◽  
Zong De Liu
Keyword(s):  
Corrosion Resistance ◽  
Composite Coating ◽  
Laser Cladding ◽  
Low Carbon Steel ◽  
Corrosion Current ◽  
Nominal Composition ◽  
Low Carbon ◽  
Laser Cladding Process ◽  
Superior Effect ◽  
Mo Content

A Fe-based amorphous composite coating doped by molybdenum was fabricated by the pulse laser cladding technology. The substrate was a low carbon steel plate. The nominal composition of the powder in the range from 100 to 200 meshes was (wt.%) Cr:14.95, Mo:25.7, B:1.24, C:3.45, Y:3.40, Fe:51.29, which was selected for the laser cladding process. The microstructure, phase composition, hardness and corrosion resistance of the coatings were characterized by means of SEM, EDS, XRD , DSC and potentiodynamic polarization test. The results show that the coating which was composed of amorphous and nanocrystal phases had the dense structure and metallurgical bonding with the substrate, meanwhile with low porosity and cracks. The addition of molybdenum played an important role in improving the corrosion resistance of the coatings. With the increasing content of molybdenum, the hardness had no significant change, while the corrosion resistance of the coatings significantly increased. From the results of polarization curves, the corrosion current density of the coating added 0 wt.% Mo is higher than that of the coatings added 2 wt.% Mo and 10 wt.% Mo. The molybdenum has a superior effect on the corrosion resistance in Fe-based amorphous composite coating.

Effect of Sol-Gel Film on the Corrosion Resistance of Low Carbon Steel Plate

2020 ◽  
Vol 984 ◽  
pp. 43-50
Author(s):  
Hua Yuan Zhang ◽  
Can Wang ◽  
Bing Xue ◽  
Jing Luo
Keyword(s):  
Corrosion Resistance ◽  
Carbon Steel ◽  
Steel Plate ◽  
Salt Spray ◽  
Sol Gel ◽  
Low Carbon Steel ◽  
Corrosion Current ◽  
Neutral Salt ◽  
Low Carbon ◽  
Gel Film

To improve the corrosion resistance on Q235 low carbon steel, in this paper, tetraethyl orthosilicate (TEOS), N-dodecyl trimethoxysilane and γ-(2,3-epoxypropoxy) propytrimethoxysilane (KH560) were used to make organic-inorganic hybrid sol-gel film. Cross cut test adhesion method, neutral salt spray test, electrochemical test and film protective efficiency were taken to value the corrosion resistance property. The corrosion topography was studied by optical microscope. In addition, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) curves and equivalent electric circuit fitting were used to analyze the corrosion mechanism. The cross cut adhesion of sol-gel film can reach 1 class and the protection class can attain 5 class after 72 hours neutral salt spray test. According to the potentiodynamic polarization curve analysis, the corrosion potential of sol-gel film coating sample after 0.5 hours immersion was -0.46 V (vs. SCE) on the 0.1 Hz, and its corrosion current density was 4.74×10-7 A·cm-2. The corrosion potential of bare Q235 low carbon steel plate after 0.5 hours immersion was -0.78 V (vs. SCE) on the 0.1 Hz, and its corrosion current density was 4.75×10-6 A·cm-2. The impedance value on 0.1 Hz (|Z|0.1Hz) (1.27×106 Ω·cm2) of sol-gel film coating sample was more than three orders of magnitude higher than the value of the low carbon steel plate. Even dipping in 3.5 wt. % NaCl for 72 hours, the |Z|0.1Hz value of sol-gel coating sample was still one order of magnitude higher than the low carbon steel plate with 0.5 hours immersion. Sol-gel film with excellent adhesion can significantly improve the corrosion resistance of low carbon steel plate. Sol-gel film can increase the protection efficiency of low carbon steel plate by 90%.

Characterization of Electroless Nickel Phosphorus Nylon 66 Composite Coating on Low Carbon Steel

2014 ◽  
Vol 984-985 ◽  
pp. 502-507 ◽  
Author(s):  
M. Jayaraj ◽  
Arjunan Siddharthan
Keyword(s):  
Corrosion Resistance ◽  
Carbon Steel ◽  
Composite Coating ◽  
Low Carbon Steel ◽  
Electroless Nickel ◽  
Low Carbon ◽  
Nylon 66 ◽  
Ftir Studies ◽  
Nylon Composite

Electroless nickel phosphorous-Nylon 66 composite coating was done on low carbon steel. The incorporation of nylon particles in electroless nickel phosphorous coating is conformed from Energy Dispersive Spectroscopy (EDS) and Fourier transform infrared spectroscopy (FTIR) studies. EN nylon composite coating shows high coating thickness and corrosive strength than EN coating for similar condition. Nylon particle were evenly distributed in EN matrix and contributed to corrosion resistance of the coating.

Fabrication and Corrosion Properties of Electroplated Ni-Co-Cr Alloy Coatings

2013 ◽  
Vol 456 ◽  
pp. 438-441 ◽  
Author(s):  
Tian Yang ◽  
Cheng Zhang Peng ◽  
Lang Xiang ◽  
Huo Cao
Keyword(s):  
Corrosion Resistance ◽  
Salt Spray ◽  
Low Carbon Steel ◽  
Corrosion Current ◽  
Polarization Measurement ◽  
Neutral Salt ◽  
Low Carbon ◽  
X Ray Diffraction ◽  
Corrosion Properties ◽  
X Ray

The electroplated Ni-Co-Cr coatings were prepared on surface of a low carbon steel. The microstructure of the deposits were analyzed by scanning electron microscope (SEM) and X-ray diffraction (XRD), the corrosion resistance of the deposits was evaluated using neutral salt-spray test and polarization measurement. The results show that the deposits are a Co and Cr solid solution in Ni with a grain size of 6.9~10.6nm, were nearly free of corrosion after neutral salt-spray tested 100 hours. With chromium content increasing, the coatings exhibited higher corrosion potential and lower corrosion current, which revealed excellent corrosion resistance.

MICROSTRUCTUR AND MICROHARDNESS OF LASER CLADDING Ni BASED ON COLD ROLLED STEEL

2018 ◽  
Vol 18 (2) ◽  
pp. 201-213
Author(s):  
Maryam A Ali Bash ◽  
Ali M Mustfa ◽  
Ali M Resan ◽  
Firas F Sayyid ◽  
Adnan I Mohammed
Keyword(s):  
Laser Cladding ◽  
Low Carbon Steel ◽  
Growth Zone ◽  
Nominal Composition ◽  
Low Carbon ◽  
Metallurgical Bonding ◽  
Graded Material ◽  
Cold Rolled ◽  
A New Technique ◽  
Small Change

A study is reported of the laser cladding of a nominal composition of Ni 5 wt% Al on coldrolled low carbon steel (0.16 wt% C), using a high power continuous CO2 laser. The severerolled microstructure of steel was changed considerably at the heat affected zones under allspecific energies. The cladded coatings showed the presence of ɣ solid solution and β(NiAlFe) phases. Sound metallurgical bonding with absence of porosity and cracks wasobserved between the substrate and the clad coat at specific energy higher than 80 J/mm2.The ferrite and pearlite microstructure of the substrate was changed to martensite at the regionadjacent to the clad interface. It followed by large grains of austenite/ferrite and pearlite(grain growth zone), fine grains of austenite/ferrite and pearlite (recrystallization zone) andvery small zone of relatively small change of cold structure (recovery zone). The last zonewas confirmed by micro hardness as a recovery zone.This investigation confirms clearly the possibility of formation different structures of graingrowth, recrystallization and recovery at the laser heat affected cold rolled low carbon steel.The observed results suggest the developing of a new technique to obtain tentativefunctionally graded material.

Numerical Simulation of Temperature Field and Stress Field to Multiple Laser Cladding Co Coatings

2013 ◽  
Vol 456 ◽  
pp. 382-387 ◽  
Author(s):  
Lin Ding ◽  
Ming Xi Li ◽  
Dao Ye Huang ◽  
Hong Yun Jang
Keyword(s):  
Temperature Field ◽  
Stress Field ◽  
Laser Cladding ◽  
Steel Substrate ◽  
Low Carbon Steel ◽  
Work Piece ◽  
Low Carbon ◽  
Scanning Velocity ◽  
Maximum Deformation ◽  
Laser Cladding Process

In order to analyze temperature field and stress field of Co-based alloys laser cladding, the model of Co-based alloys laser cladding with preset-powder method has been made on low carbon steel substrate. The temperature field and stress field of laser cladding process was analyzed by SYSWELD software, and Experimental verification is done. The results showed that temperature field is appear to a trailing tail of comet, favorable metallurgy bonding with 12.3% dilution was obtained by scanning velocity was 4 mm/s. and instantaneous cooling rate of molten pool with 4 mm/s and 5 mm/s are increased to 1.47 times and 2.02 times of 3 mm/s. The transverse residual stress different nodes on the surface of coatings are always tensile stress, and it is almost steady, the maximum deformation is 0.34 mm at the edge of work-piece, these are consistent with experimental results. These results provide reference and guide to obtain high quality coatings.

Corrosion Resistance of a Gradient Surface with Cr Alloying on Low-Carbon Steel

2017 ◽  
Vol 898 ◽  
pp. 826-831
Author(s):  
Y. Yao ◽  
X.Y. Mao ◽  
L.J. Shao ◽  
H. Chen ◽  
H.Y. Yang ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Carbon Steel ◽  
Corrosion Current Density ◽  
Corrosion Potential ◽  
Low Carbon Steel ◽  
Corrosion Current ◽  
Low Carbon ◽  
Passivation Film ◽  
The Impact ◽  
Gradient Surface

As compared with the untreated one, the low-carbon steel with gradient alloying produced by impact peening showed an increase in corrosion resistance. Specifically, when the corrosion potential increased from-1061 mV to-603.5 mV, the corrosion current density decreased from 1.579×10-3 A/cm2 to 6.703×10-4 A/cm2, the capacitive arc radius increased, and there was no corrosion products viewed on the surface. The improvement in corrosion resistance could be attributed to the diffusion of Cr allowed by the large number of defects induced by the impact peening deformation. This also resulted in the formation of Fe-Cr solid solution, which helped to promote the formation of a passivation film.

B&W IRON

Alloy Digest ◽  
1968 ◽  
Vol 17 (8) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Carbon Steel ◽  
Physical Properties ◽  
Magnetic Permeability ◽  
Electric Motor ◽  
Low Carbon Steel ◽  
Heat Treating ◽  
Magnetic Characteristics ◽  
Low Carbon ◽  
High Magnetic Permeability

Abstract B and W IRON is a thoroughly killed, low carbon steel having a combination of ductility, toughness and high magnetic permeability. It is recommended for applications where good magnetic characteristics are of primary significance, such as in the manufacture of electric motor and generator housings. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Fe-35. Producer or source: Babcock & Wilcox Company.

SAE 1020

Alloy Digest ◽  
1987 ◽  
Vol 36 (2) ◽  
Keyword(s):  
Fracture Toughness ◽  
Corrosion Resistance ◽  
Carbon Steel ◽  
Low Carbon Steel ◽  
Heat Treating ◽  
Low Carbon ◽  
Steel Mills ◽  
Temperature Performance ◽  
Wide Range ◽  
Cold Worked

Abstract SAE 1020 is a low-carbon steel combining good machinability, workability and weldability. It is carburized for use in case-hardened components and it is used for a wide range of applications in the hot-worked, cold-worked, normalized or quenched-and-tempered conditions. Its many uses include bolts, rods, plate applications, machinery components, case-hardened parts, spinning tools and trimming dies. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on low temperature performance and corrosion resistance as well as heat treating, machining, joining, and surface treatment. Filing Code: CS-113. Producer or source: Carbon steel mills.

WEIRKOTE PLUS

Alloy Digest ◽  
1987 ◽  
Vol 36 (6) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Aluminum Alloy ◽  
Carbon Steel ◽  
Physical Properties ◽  
Deep Drawing ◽  
Sheet Steel ◽  
Low Carbon Steel ◽  
Low Carbon ◽  
Steel Corp ◽  
Coated Sheet

Abstract WEIRKOTE PLUS is a Galfan-coated sheet steel. The sheet is conventional low-carbon steel normally used for galvanized sheets and strip. This digest will concentrate on the characteristics and properties of the Galfan coating which is nominally a 95% zinc-5% aluminum alloy. The coating on Weirkote Plus is ideal for a variety of tough applications. It is excellent for products that require deep drawing and it combines extra corrosion resistance with superior formability. This datasheet provides information on composition and physical properties. It also includes information on corrosion resistance as well as forming, joining, and surface treatment. Filing Code: Zn-41. Producer or source: Weirton Steel Corp.

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