THE EFFECT OF IRIDIUM ON THE NITRIC-ACID CORROSION-RESISTANCE OF PD-IR-SI COATINGS ON NICKEL

Authors
PETROVA LP EFIMENKO LP
Citation
Lp. Petrova et Lp. Efimenko, THE EFFECT OF IRIDIUM ON THE NITRIC-ACID CORROSION-RESISTANCE OF PD-IR-SI COATINGS ON NICKEL, Protection of metals, 31(6), 1995, pp. 547-549
Citations number
6
Categorie Soggetti
Metallurgy & Metallurigical Engineering
Journal title
Protection of metals → ACNP
ISSN journal
00331732
Volume
31
Issue
6
Year of publication
1995
Pages
547 - 549
Database
ISI
SICI code
0033-1732(1995)31:6<547:TEOIOT>2.0.ZU;2-D
Abstract
Pd-lr-Si coatings produced on nickel by powder fusion-sintering were t ested for chemical resistance in concentrated nitric acid (25 degrees C, 10 h). Substituting 10 and 20 wt % Ir for Pd in the reference sourc e mixture 98 wt % Pd-2 wt % Si was found to increase the corrosion res istance by factors of 10 and 20, respectively. Aging heat treatment at 700 degrees C for 20 h provides an additional 1.5 - 2 times increase in the corrosion resistance of the coatings.