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1. Principle of electroless chemical deposition
The basic principle of electroless plating is relatively simple: metal salt(s) are dissolved and reduced by an appropriate chemical agent. Nickel is the metal most frequently deposited by this type of process, and several reducing agents can be used, giving rise to the generally accepted classification of electroless nickel deposits: pure nickel deposits, phosphorus deposits and boron deposits. .
The principle of chemical deposition may appear relatively straightforward compared with that of electrolytic deposition, with which it shares many common features, but also differences such as the possibility of coating non-conductive substrates, the absence of edge effects, adequate...
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Principle of electroless chemical deposition
Electroless nickel-boron baths
Bibliography
Regulations
ELV (End of Life Vehicles).
European Directive 2000/53/EC on end-of-life vehicles stipulates that "materials and components for vehicles put on the market after 1 er January 2003 must not contain lead, cadmium, mercury or hexavalent chromium. The tolerance is 0.1% for lead and 0.01% for cadmium, provided that these substances are not intentionally introduced."...
Patents
Mc Comas, E. Nodular nickel boron coating, US patent N° 20040111947, 2004. (Universal Chemical Technologies Inc., Florida.
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