Electroless Metallic Coating on Plastic Parts Produced by Rapid Prototyping Technique

The effect of electroless metallic coating on 3D printed acrylonitrile–butadiene–styrene plastic parts surface has been studied. Owing to its excellent toughness, good-dimensional reliability, good...

Improving surface roughness of the 3D printed part using electroless plating

The influence of deep cryogenic treatment on wear resistance and life of nickel coated flywheel was studied. Nickel was deposited on to the flywheel workpiece by plating method. The nickel coated pieces were tested at various loads and speeds on a pin-on-disc apparatus, different loading conditions were used in order to compare the wear rate. The pin-on-disc gave ample results on the wear rate of the coating. Then the coated pieces were cryogenically treated at -196? at various time interval of 8,16 & 24 hours with constant supply of liquid nitrogen. Later the cryogenic treated specimen was tested for wear rates to compare the wear rate results to ultimately find the wear before and after cryogenic treatment. The microstructures of cryogenic and conventionally treated samples were analyzed. Additionally, transformation of retained austenite to martensiteplayed an effective role, i.e. improved hardness values.

https://mapletreejournals.com/index.php/IRJAT/article/download/189/102

Effects of Deep Cryogenic Treatment on Wear Resistance & Life of Nickel Coated Flywheel

Following the method of Brenner and Riddell, an ‘electroless’ technique has been developed for the deposition of nickel in this laboratory. In this technique a nickel salt is reduced on the surface being coated, usually iron or steel, by sodium hypophosphite. In contrast with displacement plating, the surface itself does not enter directly into the reaction. Under proper conditions, nickel is an effective catalyst for the reduction and this auto-catalytic effect permits the formation of coatings several mils thick, provided the hypophosphite and nickel salt in the bath are periodically replenished. Rates of deposition as high as 0·008 in. per hour have been obtained. The deposition can be made on both metals and insulators. Electroless nickel is superior in several respects to the conventional electro-deposit and, in addition, has the distinct advantage that the deposit is uniform in thickness on all surfaces to which the solution is freely accessible.A brief report is given here of the mechanism ...

K. A. Sarojini

Papers

Electroless Nickel Plating and Its Applications