Palladinization

Palladinization 

the deposition of a thin layer (1–5 microns) of palladium on metallic articles in order to increase the articles’ corrosion resistance and reflectivity, as well as to achieve a constant electric contact conductivity. A palladium coating can also serve as an undercoating for rhodium plating and soldering. The coatings are deposited through electroplating from phosphate, hydrochloric acid, chloride, or nitrate electrolytes. The process is carried out with the use of graphite (insoluble) or palladium anodes.

Palladinization is used in the electrical industry to protect bronze, constantan, and tungsten contacts and strips from corrosion; it is also used in the production of electric contacts and of metal mirrors with high reflectivity.

REFERENCES

Lainer, V. I. Sovremennaia gal’vanotekhnika. Moscow, 1967.
Bondarev, V. V. Novoe v nanesenii gal’vanopokrytii blagorodnykh metal-lov. Moscow, 1970.