EP 3098334 A1 20161130 - ELECTROLYTIC PROCESS FOR COATING METAL SURFACES TO PROVIDE HIGH WEAR RESISTANCE
Title (en)
ELECTROLYTIC PROCESS FOR COATING METAL SURFACES TO PROVIDE HIGH WEAR RESISTANCE
Title (de)
ELEKTROLYTISCHES VERFAHREN ZUR BESCHICHTUNG VON METALLISCHEN OBERFLÄCHEN ZUR BEREITSTELLUNG HOHER VERSCHLEISSFESTIGKEIT
Title (fr)
PROCÉDÉ ÉLECTROLYTIQUE POUR LE REVÊTEMENT DE SURFACES MÉTALLIQUES POUR FOURNIR UNE RÉSISTANCE ÉLEVÉE À L'USURE
Publication
Application
Priority
IT UB20151322 A 20150529
Abstract (en)
Process for coating a metal article, which comprises: providing an electrolytic bath comprising a suspension of boron carbide particles, having an average size from 0.01 µm to 2 µm, in an aqueous solution comprising: at least one nickel (II) salt; at least one phosphorous compound selected from: phosphoric acid, phosphorous acid, hypophosphorous acid or salts thereof; at least one surfactant; immersing in the electrolytic bath a cathode comprising the article to be coated and an anode, and carrying out an electrodeposition by passing direct current in the electrolytic bath; subjecting the thus coated metal article to a heat treatment. In such a way a coating layer comprising a phosphorus/nickel alloy matrix and boron carbide particles having an average size from 0.01 µm to 2 µm is obtained. The coating layer thus obtained has very high wear resistance, also at high temperatures, and high hardness (up to 1500 HV), and at the same time high thickness uniformity.
IPC 8 full level
B01F 5/00 (2006.01); B01F 5/10 (2006.01); C25D 3/12 (2006.01); C25D 5/08 (2006.01); C25D 5/14 (2006.01); C25D 5/50 (2006.01); C25D 15/00 (2006.01); C25D 21/10 (2006.01)
CPC (source: EP US)
B01F 23/023 (2022.01 - EP); B01F 25/10 (2022.01 - EP); B01F 25/50 (2022.01 - EP); C25D 3/12 (2013.01 - EP); C25D 5/08 (2013.01 - EP US); C25D 5/14 (2013.01 - EP US); C25D 5/50 (2013.01 - EP); C25D 5/617 (2020.08 - EP US); C25D 5/619 (2020.08 - EP US); C25D 15/00 (2013.01 - EP US); C25D 21/10 (2013.01 - EP)
Citation (applicant)
EP 1067220 A2 20010110 - SBR S R L [IT]
Citation (search report)
- [A] JP S6411998 A 19890117 - RIKEN KK
- [Y] EP 0005890 A2 19791212 - AKZO NV [NL]
- [Y] US 2011308958 A1 20111222 - KURRLE MATTHIAS [DE]
- [Y] US 6109778 A 20000829 - WILMER JEFFREY A [US]
- [IY] Z. GUO ET AL: "Microstructure and wear resistance of electrodeposited RE-Ni-Mo-P-B 4 C-PTFE composite coating", MATERIALS SCIENCE AND TECHNOLOGY, vol. 20, no. 2, 1 February 2004 (2004-02-01), GB, pages 257 - 260, XP055245785, ISSN: 0267-0836, DOI: 10.1179/026708304225011270
- [Y] JI BO JIANG ET AL: "Electrodeposition and Hardness and Corrosion Resistance Propertie of Ni/Nano-B<sub>4</sub>C Composite Coatings", ADVANCED MATERIALS RESEARCH, vol. 399-401, 22 November 2011 (2011-11-22), pages 2055 - 2060, XP055245791, DOI: 10.4028/www.scientific.net/AMR.399-401.2055
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
DOCDB simple family (application)
EP 16171777 A 20160527; IT UB20151322 A 20150529