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Nickel-phosphorus coatings (4 to 15% P) deposited from baths contaning sodium hypophosphite and certain mono- or di-carboxylic acids have higher hardness (5 to 6 GPa before and 9 to 10 GPa after heat-treatment) and wear resistance comparable to that at of chrome. The baths operate at current densities up to 10-15 A/dm, are stable due to good buffering properties and some of the contain no organic additives.