Wear and corrosion behaviour of thermally sprayed cermet coatings

2001 ◽  
Vol 138 (2-3) ◽  
pp. 149-158 ◽  
Author(s):  
D Toma ◽  
W Brandl ◽  
G Marginean
Keyword(s):  
Corrosion Behaviour ◽  
Cermet Coatings ◽  
Wear And Corrosion ◽  
Thermally Sprayed

Corrosion Behavior of WC-Co Cermet Coatings

2015 ◽  
Vol 819 ◽  
pp. 87-90 ◽  
Author(s):  
Zakiah Kamdi ◽  
C.Y. Phang ◽  
H. Ahmad
Keyword(s):  
Corrosion Resistance ◽  
Corrosion Behavior ◽  
Alkaline Electrolyte ◽  
Electrochemical Test ◽  
Cermet Coatings ◽  
Wear And Corrosion ◽  
Thermally Sprayed Coatings ◽  
Wear And Corrosion Resistance ◽  
Thermally Sprayed ◽  
Sprayed Coatings

Metal-ceramic composite or cermet coatings have become popular due to their enhanced wear and corrosion resistance properties. Cermet consists of ceramic particulate embedded in a metallic binder. WC-Co coatings are often used in applications that require wear resistance, but there are many applications in which thermally sprayed coatings have been deposited on components that operate under both abrasive and corrosive condition. Thus, in this study, the corrosion behavior of WC-12wt%Co in different electrolyte has been evaluated. Electrochemical test has been done in three electrolytes namely 0.5 M hydrochloric acid, HCl, 0.5 M sulfuric acid, H2SO4 and 0.5 M sodium hydroxide, NaOH. It is found that corrosion potential of this coating in acidic environment is more positive compares to in alkaline environment. Both in acid and alkaline electrolyte, binder dissolution were preferential. It may be concluded that this coating have higher corrosion resistance in alkaline electrolyte than in acid electrolyte.

Wear and corrosion behaviour of plasma nitrided EN353 steel for automotive application

2020 ◽  
Author(s):  
S. Lakshmi Sankar ◽  
Arun Kumar Gopal ◽  
P. Kuppusami ◽  
A. Amala Mithin Minther Singh ◽  
M. Prabhu ◽  
...  
Keyword(s):  
Corrosion Behaviour ◽  
Automotive Application ◽  
Wear And Corrosion

scholarly journals Combating Wear of ASTM A36 Steel by Surface Modification Using Thermally Sprayed Cermet Coatings

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Vineet Shibe ◽  
Vikas Chawla
Keyword(s):  
Thermal Spray ◽  
Sliding Wear ◽  
Thermal Spray Coatings ◽  
Wear Performance ◽  
Cermet Coatings ◽  
Spray Coatings ◽  
Spray Technique ◽  
A36 Steel ◽  
Thermally Sprayed ◽  
Better Than

Thermal spray coatings can be applied economically on machine parts to enhance their requisite surface properties like wear, corrosion, erosion resistance, and so forth. Detonation gun (D-Gun) thermal spray coatings can be applied on the surface of carbon steels to improve their wear resistance. In the present study, alloy powder cermet coatings WC-12% Co and Cr3C2-25% NiCr have been deposited on ASTM A36 steel with D-Gun thermal spray technique. Sliding wear behavior of uncoated ASTM A36 steel and D-Gun sprayed WC-12% Co and Cr3C2-25% NiCr coatings on base material is observed on a Pin-On-Disc Wear Tester. Sliding wear performance of WC-12% Co coating is found to be better than the Cr3C2-25% NiCr coating. Wear performance of both these cermet coatings is found to be better than uncoated ASTM A36 steel. Thermally sprayed WC-12% Co and Cr3C2-25% NiCr cermet coatings using D-Gun thermal spray technique is found to be very useful in improving the sliding wear resistance of ASTM A36 steel.

Assessment OF HVOF Coatings for Wet Corrosion Protection

1998 ◽  
Author(s):  
M. Dvorak ◽  
P. Heimgartner
Keyword(s):  
Corrosion Protection ◽  
Corrosion Behaviour ◽  
Metallic Coatings ◽  
Hvof Spraying ◽  
Special Cases ◽  
Recent Developments ◽  
High Investment ◽  
New Generation ◽  
Thermally Sprayed ◽  
Sprayed Coatings

Abstract Until now the use of thermal sprayed metallic coatings for wet corrosion protection is limited to applications where the coating (Al-alloys, Zn-alloys and their mixtures) acts as an anode to protect the substrate or special cases, where thick cold sprayed metallic layers give good results. Other atmospheric cold sprayed layers made of corrosion resistant Ni, Co, Cu or Fe base alloys have their limitations due to the process related discontinuities like pores and oxide films. In more aggressive environments thermal sprayed and fused layers made of so called self-fluxing Ni and Co based alloys are commonly applied. Also in some applications the use of specially designed gas shrouds or of spraying techniques running in inert gas atmospheres or vacuum can yield protective coating solutions. However, these techniques have high investment or service costs or the size of the parts to be coated is restricted. Recent developments in HVOF-spraying open new possibilities in applying cold sprayed coatings on site with good corrosion resistance. The aim of this paper is on one hand to give a comparative overview about the wet corrosion behaviour of thermally sprayed metallic coatings using different spraying techniques related to the performance of the corresponding bulk materials and on the other hand to demonstrate the potential of a new generation of coatings to protect or repair structures exposed to aggressive environments.

Evaluation of Wear and Corrosion Behaviour of Hybrid Sintered Ti6Al4V Alloy

2019 ◽  
Vol 821 ◽  
pp. 321-326
Author(s):  
Olusoji Oluremi Ayodele ◽  
Mary Ajimegoh Awotunde ◽  
Mxolisi Brendon Shongwe ◽  
Adewale Oladapo Adegbenjo ◽  
Bukola J. Babalola ◽  
...  
Keyword(s):  
Corrosion Behaviour ◽  
Wear Test ◽  
Sintered Compact ◽  
Plasma Sintering ◽  
Wear And Corrosion ◽  
The Coefficient Of Friction ◽  
Spark Plasma ◽  
Worn Surface ◽  
Material Wear ◽  
Sintered Materials

Ti6Al4V alloy was consolidated by hybrid spark plasma sintering at a temperature of 1200 °C, pressure of 50 MPa, holding time of 5 min and heating rate of 100 °C/min. This resulted in the maximum value of sintered density. Microstructural evolutions of the sintered compact were analysed with SEM. Sliding wear test were accomplished at different sliding loads of 5, 8 and 10 N using ball on disc tribometer configuration with stainless steel as the counterface material. Wear debris obtained was found to contain mostly the sintered materials with minute traces of the counterface material. The coefficient of friction reaches the maximum with increase in applied load. Worn surface analyses revealed the wear mechanism was abrasive. The potentiodynamic polarisation of the sintered compact showed the sintered compact in 0.9 wt % NaCl solution exhibited more resistance to corrosion.

Wear and corrosion behaviour of high-chromium (14–30% Cr) cast iron alloys

2002 ◽  
Vol 128 (1-3) ◽  
pp. 250-255 ◽  
Author(s):  
E Zumelzu ◽  
I Goyos ◽  
C Cabezas ◽  
O Opitz ◽  
A Parada
Keyword(s):  
Cast Iron ◽  
Corrosion Behaviour ◽  
Iron Alloys ◽  
High Chromium ◽  
Wear And Corrosion
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