Ductile iron can be deposited from ferrous chloride solutions at current densities up to 30 amp/dm2 (280 ampjft2), which is several times the customary rate of iron deposition. The t emperature and acidity of the baths must be controlled within narrow limits. P age I. Introduchlon __ ___ __ _____________________________________________ 535 II.
Platelets as fillers in polymer coatings contribute to corrosion resistance by increasing the diffusion path of gases. The authors demonstrate that the same platelets can improve tribological properties and, thus, open a new way to design multifunctional polymer coatings. Improved corrosion resistance, low friction, and low wear are reported for polyimide composite coatings filled with a combination of boron nitride, pigment platelets, perfluoropolyether, and Si 3 N 4 particles. Contributions of different fillers to the tribological performance are explored for coatings with different filling protocols. The synergy of four components leads to the excellent tribological performance of the fully formulated coatings, while they cannot impart significant improvement in friction and wear when used separately.
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