SUMMARY
Electrolytic and hybrid coatings were obtained by the electrodeposition from low-concentrated Watts elec-trolyte with B, SiC and PTFE dispersion produced by the use of addition agents. Corrosion investigations in 0.5 M NaCl solution of composite and hybrid coatings were made. The accelerated tests of composite coatings were carried out by the CASS method. The Corrodkote test of hybrid coatings
and comparative tests of technical chromium coatings were presented. It was found that all investigated coatings withstood the heavy conditions tests and the hybrid coatings also the exceptionally heavy conditions tests. The internal stress of deposited composite and hybrid coatings, measured by dilatometric method, were compressive and approached to 0 when coating thickness reached ~30 μm. To investigate the usability of electroplated composite and hybrid layers applied in sliding joints of motor vehicle parts and assemblies operating in rotation, oscillating or recip-rocating motion measurements were carried out on Amsler and Tester T- 0,5 testing devices. The tested joints were lubricated during investigation. For comparative purposes the technical chromium coating was also tested.
Key words
Nickel, coating, composite, hybrid, corrosion, wear.
1 Instytut Mechaniki Precyzyjnej, Warszawa
