Electroless Nickel Plating
Description: Electroless Nickel (EN) Plating is a non-conventional chemical reduction process which depends upon the catalytic reduction process of nickel ions in an aqueous solution (containing a chemical reducing agent) and the subsequent deposition of nickel metal without the use of electrical energy. ENI plating offers superior corrosion protection, uniform and controllable layer thickness, wear resistance high surface hardness, non-stick property for plastic moulds and extrusion dies and solderability, ductility and lubricity. Due to its exceptional corrosion resistance and high hardness, the process finds wide application on items such as valves and pump parts. As no current is used, plating on intricate parts with whole and deep recesses can be done with a uniform layer thickness. There is no excess build-up at edges or at corners and hence eliminates post plating grinding operation. The plating layer is amorphous and corrosion protection is superior to that of equal thickness of electrodeposited nickel. ENI has surface hardness ranging from 48 to 62 HRC with excellent bonding and the plated layer does not flake-off. Electroless nickel plating is ideal for complex shapes where uniform and controllable plating thickness is not possible by conventional electroplating process. This makes electroless coating the most suitable for plastic dies. Regular plating is done on taper cavities, breaker plates, spiders and other extrusion die parts. Barrels for injection moulding machines are plated for non-stick property and for easy cleaning. Worn out punches can be re-build to original dimensions by uniform coating. This makes electroless coating superior to electroplating.
Other Catalogs (From Electroless Platers) :
