AUTOMATIC SYSTEM FOR ENDLESS OPERATION OF ELECTROLESS NICKEL

摘要

Wear- and corrosion-resistant nickel phosphorus alloy deposits from electroless processes have been used for various large-scale applications since their wider introduction to the industry in the 1980's. The phosphorus content (P-content) typically can be adjusted between 1 and 14%; high P-contents are chosen for highest chemical and corrosion resistance, while low P-contents provide higher hardness and excellent wear properties. The coating thickness is uniform and almost entirely independent from substrate geometry, as chemical reducing agents are used and current density variation do not exist as with electrolytic processes.