EP 1743955 B1 20120502 - Steel product excellent in corrosion resistance and corrosion fatigue resistance, and surface treatment method therefor
Title (en)
Steel product excellent in corrosion resistance and corrosion fatigue resistance, and surface treatment method therefor
Title (de)
Stahlteil mit hervorragendem Korrosionswiderstand und Korrosionsermüdungswiderstand, sowie Oberflächendbehandlung zur Herstellung
Title (fr)
Pièce en acier avec une excellente résistance à la corrosion et une excellente résistance à la fatigue de corrosion et procédé de traitement de surface pour en obtenir
Publication
Application
Priority
JP 2005206977 A 20050715
Abstract (en)
[origin: EP1743955A2] The invention provides a steel product excellent in corrosion resistance and corrosion fatigue resistance, comprising a coating film on the surface of the steel product, wherein a ratio of the number of Al atoms to the total number of Fe, C, Al, P and O atoms and optionally added Si, Mn and Cr atoms is 0.5% or more in an average composition of the coating film, and the number of Al atoms in the average composition of the coating film is higher than the number of Al atoms in an average composition of the steel product before surface treatment.
IPC 8 full level
C23C 22/20 (2006.01)
CPC (source: EP KR US)
C22C 38/02 (2013.01 - KR); C22C 38/04 (2013.01 - KR); C22C 38/06 (2013.01 - KR); C22C 38/18 (2013.01 - KR); C23C 22/20 (2013.01 - EP US)
Designated contracting state (EPC)
DE ES FR GB
DOCDB simple family (publication)
EP 1743955 A2 20070117; EP 1743955 A3 20070124; EP 1743955 B1 20120502; CN 1924097 A 20070307; CN 1924097 B 20110223; ES 2387395 T3 20120921; JP 2007023337 A 20070201; JP 5153063 B2 20130227; KR 101285969 B1 20130712; KR 20070009446 A 20070118; US 2007012382 A1 20070118
DOCDB simple family (application)
EP 06014476 A 20060712; CN 200610105920 A 20060714; ES 06014476 T 20060712; JP 2005206977 A 20050715; KR 20060065909 A 20060713; US 48498806 A 20060711