Ni-P Coating on Steel Support by Electroless Method
Abstract
The autocatalytic reduction method (electroless method) was applied to obtain
the Ni-P layers with different P contents. Nickel sulfate was used as nickel ion
source and as reducing agent the sodium hypophosphite. The surface morphology,
microstructure, layers thickness and corrosion resistance in acidic and basic
environment were analyzed. The research results show a strong connection between
layer characteristics and process parameters: pH and temperature. The analyzed
layers show a high stability in 10% NaOH solution and different corrosion rates in
HCl solutions (1 N and 0.5 N) depending on the phosphorus content in the layer.
Collections
- 2017 fascicula9 nr2 [10]