Effect of Bath Parameters on Electroless Ni-P and Zn-P Deposition on 1045 Steel Substrate

摘要

This research investigated the effect of varying bath concentration, operating temperature and platingtime on the electroless deposition of Ni-P and Zn-P on the class AISI 1045 carbon steel. 0.4 g/L to 0.7g/L for Ni 2 and Zn 2 concentration was used as bath formulation while other components were keptconstant. Operating temperature was varied from 70 - 100 and the plating time was between 15minutes and 35 minutes., It was observed that a bath concentration of 0.50 g/L -0.60 g/L for Ni-P,deposition time of 25-35 minutes and 80 temperature gave brightness and uniform filmdeposition on the carbon steel. Bath instability was observed as the temperature of the bath increasedbeyond 80 . Increased concentration of the metal source showed a down effect on the platingprocess and plating time below 25 minutes gave a dull bright nickel deposit. Zn-P maintainscontinuous bright deposition from 0.55 g/L to 0.70 g/L Zinc Chloride salt as the temperature0 0 increases from 70 C to 100 C. Increasing the deposition time gave a positive effect on the brightdeposit of Zn-P on the substrate. It was also observed that increasing time of plating served to increaseamount of deposit per unit area. Both coatings have good wear resistance at the best plating parameter.Scanning Electron Microscope result revealed continuous film surface morphology. The platingparameters obtained could be applied on low carbon steel for decorative or improved wear resistancewhere the cost of other method of coating is high-priced.