The effect of formic acid concentration on the conductivity and corrosion resistance of chromium carbide coatings electroplated with trivalent chromium

2013 ◽  
Vol 282 ◽  
pp. 544-551 ◽  
Author(s):  
Chen-En Lu ◽  
Nen-Wen Pu ◽  
Kung-Hsu Hou ◽  
Chun-Chieh Tseng ◽  
Ming-Der Ger
Keyword(s):  
Corrosion Resistance ◽  
Formic Acid ◽  
Acid Concentration ◽  
Chromium Carbide ◽  
Trivalent Chromium ◽  
Carbide Coatings ◽  
Chromium Carbide Coatings

Deposition of chromium oxide-chromium carbide coatings via high velocity suspension flame spraying (HVSFS)

2018 ◽  
Vol 351 ◽  
pp. 171-176 ◽  
Author(s):  
Andrea Förg ◽  
Matthias Blum ◽  
Andreas Killinger ◽  
José Andrés Moreno Nicolás ◽  
Rainer Gadow
Keyword(s):  
Chromium Carbide ◽  
Chromium Oxide ◽  
High Velocity ◽  
Flame Spraying ◽  
Carbide Coatings ◽  
Chromium Carbide Coatings

Grinding of Chromium Carbide Coatings Using Electroplated Diamond Wheels

2017 ◽  
Vol 139 (12) ◽  
Author(s):  
Zhongde Shi ◽  
Amr Elfizy ◽  
Helmi Attia ◽  
Gilbert Ouellet
Keyword(s):  
Surface Roughness ◽  
Chromium Carbide ◽  
Material Removal Rate ◽  
Material Removal ◽  
Removal Rate ◽  
Depth Of Cut ◽  
Process Conditions ◽  
Carbide Coatings ◽  
Grinding Power ◽  
Chromium Carbide Coatings

This paper reports an experimental study on grinding of chromium carbide coatings using electroplated diamond wheels. The work was motivated by machining carbide coatings in gas turbine engine applications. The objective is to explore the process conditions and parameters satisfying the ground surface quality requirements. Surface grinding experiments were conducted with water-based grinding fluid on chromium carbide coated on flat surfaces of aluminum blocks for rough grinding at a fixed wheel speed vs = 30 m/s, and finish grinding at vs = 30, 60 m/s. The effects of depth of cut and workspeed on grinding power, forces, and surface roughness were investigated for each of the wheel speeds. Material removal rate Q = 20 mm3/s for rough grinding at a grinding width b = 101.6 mm was achieved. It was found that the maximum material removal rate achievable in rough grinding was restricted by chatters, which was mainly due to the large grinding width. The specific energy ranged from 27 to 59 J/mm3 under the tested conditions. Surface roughness Ra = 3.5–3.8 μm were obtained for rough grinding, while Ra = 0.6–1.5 μm were achieved for finish grinding. Surface roughness was not sensitive to grinding parameters under the tested conditions, but was strongly dependent on the diamond grain sizes. Imposing axial wheel oscillations to the grinding motions reduced surface roughness by about 60% under the tested condition. It was proved that it is feasible to grind the chromium carbide coating with electroplated diamond wheels.

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