Development of Corrosion Resistance Coating for AISI 410 Grade Steel

2015 ◽  
Vol 813-814 ◽  
pp. 135-139 ◽  
Author(s):  
K.G. Girisha ◽  
R. Rakesh ◽  
C. Durga Prasad ◽  
K.V. Sreenivas Rao
Keyword(s):  
Corrosion Resistance ◽  
Plasma Spray ◽  
Corrosion Behaviour ◽  
Steel Substrate ◽  
Salt Spray ◽  
Research Work ◽  
Optical Microscope ◽  
Air Plasma ◽  
Spray Process ◽  
Plasma Spray Process

In this present research work, corrosion behaviour of grit blasted AISI 410 steel substrate coated with NiCr/Al2O3,NiCr/ZrO2 particles was investigated using salt spray test as per ASTM B117. Coatings were prepared using air Plasma spray process. Nickel chromium was used as bond coat for obtaining good fastening between the base metal and coated particles. The microstructures of the coated and un-coated specimens were characterized using scanning electron microscope and optical microscope. Distribution coated particle was found uniform throughout the steel substrate was revealed from SEM microphotographs. The obtained results shows significant improvement in corrosion resistance and micro hardness for NiCr/Al2O3 and NiCr/ZrO2 coating deposited on steel by plasma spray process than the as sprayed base steel substrates.

THE EFFECT OF CARBURIZATION OF ASTM A36 STEEL SUBSTRATE IN IMPROVING WEAR PROPERTIES OF PLASMA SPRAYED WC–12%Co COATING

2016 ◽  
Vol 24 (05) ◽  
pp. 1750068 ◽  
Author(s):  
P. KARUPPUSWAMY ◽  
C. BHAGYANATHAN ◽  
C. NARENDHAR ◽  
R. N. KIRUPAKARAN ◽  
S. D. ARUN KUMAR
Keyword(s):  
Mechanical Properties ◽  
Thermal Spray ◽  
Plasma Spray ◽  
Steel Substrate ◽  
Research Work ◽  
Deterrent Effect ◽  
Wear Properties ◽  
Thermal Spray Process ◽  
Spray Process ◽  
A36 Steel

Thermally sprayed coating is commonly used to modify the surface to improve the mechanical properties of the substrates to meet their functional requirements. Numerous research works were carried out to assess the suitability of the WC–Co coating for industrial applications using thermal spray process. Meanwhile, few researchers expressed about the deterrent effect of the decarburization on mechanical properties of the coating due to processing at high temperature in thermal spray process which reduces the efficiency of the coating process. In this research work, coating of WC–12%Co powder over ASTM A36 steel substrate through plasma spray process was considered to investigate the effect of introducing the carburization process on wear properties of the resultant coating. Carburization process was introduced on the ASTM A36 steel substrate before the application of the plasma spray coating to compensate the loss of carbon during the process. Characterization of the deposited coating was done by scanning electron microscope, X-ray diffraction, hardness, corrosive resistivity test and wear tests. The results of the tests indicated that introduction of the carburization process remarkably increased the hardness of the coating and corrosive resistivity besides improving the wear resistance.

On the Reproducibility of Air Plasma Spray Process and Control of Particle State

2006 ◽  
Vol 15 (4) ◽  
pp. 739-743 ◽  
Author(s):  
V. Srinivasan ◽  
A. Vaidya ◽  
T. Streibl ◽  
M. Friis ◽  
S. Sampath
Keyword(s):  
Plasma Spray ◽  
Particle State ◽  
Air Plasma Spray ◽  
Air Plasma ◽  
Spray Process ◽  
Plasma Spray Process ◽  
And Control

scholarly journals Fabrication of samarium strontium aluminate ceramic and deposition of thermal barrier coatings by air plasma spray process

2018 ◽  
Vol 144 ◽  
pp. 02001 ◽  
Author(s):  
T Baskaran ◽  
Shashi Bhushan Arya
Keyword(s):  
Thermal Barrier Coatings ◽  
Plasma Spray ◽  
Thermal Barrier ◽  
Air Plasma Spray ◽  
Air Plasma ◽  
Strontium Aluminate ◽  
Barrier Coatings ◽  
Spray Process ◽  
Plasma Spray Process ◽  
Thermo Physical Properties

Thermal barrier coatings (TBC) with the metallic NiCrAlY bond coat are often used in many aircraft engines to protect superalloy components from high-temperature corrosion thereby to improve the life of gas turbine components. The search for new TBC material has been intensified in recent years due to lack of thermo-physical properties of conventionally used Yttria stabilized Zirconia (YSZ) TBCs. Recently, the rare earth containing Samarium Strontium Aluminate (SSA) based ceramic was proposed as a new TBC material due to its matching thermo-physical properties with the substrate. The present work focused on the synthesis of SSA ceramics for TBCs application and its coatings development on Ni-based superalloy Inconel 718 substrate by air plasma spray process. The X-ray photoelectron spectroscopy (XPS) result confirmed the formation of single phase SSA ceramic after synthesis. The surface morphology of SSA TBCs is mainly composed of melted splats, semi and un-melted particles. The cross-sectional SEM micrographs did not show any spallation at the interface which indicated good mechanical interlocking between the bond coat and ceramic top coat. The Young’s modulus and hardness of SSA TBCs were found to be 80 and 6.1 GPa, respectively. The load-depth curve of SSA TBC showed good elastic recovery about 47 %.

scholarly journals Corrosion Behaviour of Silver-Cobalt Oxide-Titanium Dioxide Nanocomposites Coated Mild Steel in Sea water

2020 ◽  
Vol 5 (2) ◽  
Author(s):  
Mohammed Ibrahim ◽  
Joseph B Agboola ◽  
Ambali S Abdulkareem ◽  
Oye Adedipe ◽  
Jimoh O Tijani
Keyword(s):  
Corrosion Resistance ◽  
Mild Steel ◽  
Cobalt Oxide ◽  
Sea Water ◽  
Corrosion Behaviour ◽  
Steel Substrate ◽  
Research Work ◽  
Cell System ◽  
Coated Sample ◽  
Positive Direction

The research work investigates the corrosion resistance of Silver-Cobalt Oxide-Titanium Dioxode (Ag/Co3O4/TiO2) nanocomposites coated mild steel (AISI 1020) in seawater environment. The coatings were carried out by dipping method. The nanoparticles were individually produced by mixing the salt precursors with extract of Piptadeniastrum africana leaf under the optimized synthesis conditions. The Ag/Co3O4/TiO2 nanocomposite was produced by mixing Ag, Co3O4 and TiO2 NPs in equal proportions to constitute 75 wt% of the composite. 10 wt % epoxy resin and its hardener in the ratio (1:1) were added to serve as the binder, while 15 wt% of CNT was introduced to serve as support. Phase and Microstructural examination of the coatings was carried out by XRD and HRSEM. The corrosion protection properties were determined by using computer- controlled EGG 273A Potentiostat with three- electrode cell system under static laboratory conditions using the linear potentiodynamic polarization method.  The coated sample was dried at temperatures of 100oC to enhance adherence of the coating on the steel substrate. The result of Tafel polarization plots revealed improved corrosion resistance of the coated specimen as compared to as-received sample. Corrosion rate and corrosion resistance of 0.201 m/y and 195.12 Ω were recorded against the coated sample while 0.261 m/y and 71.42 Ω were recorded for the as-received sample respectively. The coated sample exhibited higher potential shift in the positive direction and showed better corrosion resistance properties.Keywords- Nanocomposite, Mild steel, Corrosion, Potentio-Dynamic polarization, Seawater.

Study of Corrosion Performance of Electroless Ni-P Coating with Molybdenum Disulfide Nanoparticles

2008 ◽  
Vol 373-374 ◽  
pp. 256-259 ◽  
Author(s):  
Xian Guo Hu ◽  
Wen Ju Cai ◽  
Jiu Cong Wan ◽  
Yu Fu Xu ◽  
Xiao Jun Sun
Keyword(s):  
Corrosion Resistance ◽  
Molybdenum Disulfide ◽  
Composite Coating ◽  
Steel Substrate ◽  
Surface Film ◽  
Composite Coatings ◽  
Salt Spray ◽  
Optical Microscope ◽  
Corrosion Mechanism ◽  
Corrosion Properties

The electroless nickel-phosphor coatings containing molybdenum disulfide nanoparticles were prepared and analyzed in this paper. The effects of incorporation of MoS2 into the Ni-P coating on the morphology of the coating surface and corrosion properties were also studied. Corrosion tests were conducted inside a salt spray box with NaCl solution (5.0 wt%). The corrosional surfaces were studied and analyzed through optical microscope, X-ray spectrometer (XRD) and scanning electron microscopy (SEM). The investigation on the relationship between heat-treatment and the corrosion resistance of the coatings showed that the corrosion resistance of the composite coating became worse because of the occurrence of transformation from non-crystalline to crystalline, and then increased the metastable intergradation of the composite coating. Meanwhile, the experimental results also showed that corrosion resistance of the coating containing MoS2 was higher than that of steel substrate. The corrosion mechanism of the composite coatings was mainly ascribed to the formation of micro-cell around the nanosized MoS2 particles, and the active ion like Cl- destroyed the surface film and induced the corrosion towards the inside part of coating.

Influence of plasma spraying parameters on microstructure and corrosion resistance of Cr3C2-25NiCr cermet carbide coating

2019 ◽  
Vol 66 (3) ◽  
pp. 336-342 ◽  
Author(s):  
Tuan Nguyen Van ◽  
Tuan Anh Nguyen ◽  
Quy Le Thu ◽  
Ha Pham Thi
Keyword(s):  
Corrosion Resistance ◽  
Potentiodynamic Polarization ◽  
Corrosion Behaviour ◽  
Steel Substrate ◽  
Salt Spray ◽  
Compositional Analysis ◽  
Atmospheric Plasma ◽  
Content Type ◽  
Spraying Parameters ◽  
Hardness Scale

Purpose In this work, Cr3C2-25NiCr coatings were deposited on 410 stainless steel substrate by using the atmospheric plasma spray technique, at varying spaying parameters. The porosity and microhardness, adhesion strength and corrosion behaviour of coatings were examined in relation to these spraying parameters. Design/methodology/approach The microstructure of prepared coatings was examined by using scanning electron microscopy. The coating compositional analysis was performed by using X-ray diffraction (XRD) technique. The corrosion resistance of coated steel was investigated by potentiodynamic polarization. Results indicate that optimal factors for minimalizing the porosity were as follows: 10 g/min feed rate, 600 A plasma current and 100 mm spraying distance. The spraying factors influencing corrosion resistance of coating were also evaluated. Findings Under this optimal condition, the porosity of coating reached its minimal value of 3.1 per cent. The microhardness and adhesion of coatings also reached their maximum values of 64.8 Rockwell Hardness scale C and 60 MPa, respectively. XRD results indicated the transformation of Cr3C2 originating from Cr3C2-25NiCr source powder into Cr7C3 and Cr23C6 crystalline phases, due to the high temperature during spraying process. The undetectable Cr3C2 peaks indicating that this phase was remained in coating at very low concentrations. The potentiodynamic polarization and salt spray tests confirmed the highest corrosion resistance for the coating prepared by optimal spraying parameters. Originality/value The application of Cr3C2-NiCr cermet carbit coating for protection of steel from corrosion-erosion is very promising.

Corrosion behaviour of hot-dip Zn-Al-Mg coatings with different Al content

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Prabhat Kumar Rai ◽  
Dinesh Rout ◽  
D. Satish Kumar ◽  
Sanjay Sharma ◽  
G. Balachandran
Keyword(s):  
Corrosion Resistance ◽  
Corrosion Behaviour ◽  
Steel Substrate ◽  
Salt Spray ◽  
Protective Film ◽  
Nacl Solution ◽  
X Ray Diffraction ◽  
Content Type ◽  
Al Content ◽  
Process Simulator

Purpose The purpose of the present study is to simulate the industrial hot-dip process of Zn-2.5Wt.%Mg-3 Wt.%Al and Zn-2.5 Wt.%Mg-9 Wt.%Al-0.15 Wt.%Si coatings and to study the effect of low and high Al variation on their microstructure, microhardness, adhesion and corrosion behaviour. Design/methodology/approach The hot-dip Zn-2.5 Mg-xAl coating simulation on steel substrate was carried out using a hot-dip process simulator. The microstructure of the coatings was characterized using a scanning electron microscope, energy dispersive spectroscopy and X-ray diffraction. The corrosion behaviour of the coatings was studied using a salt spray test in 5% NaCl solution as well as dynamic polarization in 3.5% NaCl solution. Findings Microhardness of the developed Zn-2.5 Mg-xAl coatings has been found to be approximately two times higher than that of the conventional galvanized coating. Zn-2.5 Mg-3Al coating has exhibited two times higher corrosion resistance as compared to that of Zn-2.5 Mg-9Al-0.15Si coating because of formation of more homogeneous and defect-free microstructure of the former. The MgZn2 phase has undergone preferential dissolution and provided Mg2+ ions to form a protective film. Originality/value The relative corrosion resistance of the two Zn–Al–Mg coatings with different Al content has been studied. The defect formed because of higher Al addition in the coating has been detected, and its effect on corrosion behaviour has been analysed.

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