EP 0667401 B1 19971126 - Composition of salt baths based on alkali metal nitrates for oxidizing ferrous metals to improve their corrosion resistance
Title (en)
Composition of salt baths based on alkali metal nitrates for oxidizing ferrous metals to improve their corrosion resistance
Title (de)
Zusammensetzung von Schmelzbädern auf der Basis von Alkalimetallnitraten zum Oxydieren von Eisenmetalle zur Verbesserung dessen Korrosionsbeständigkeit
Title (fr)
Composition de bains de sels à base de nitrates alcalins pour oxyder du métal ferreux et ainsi améliorer sa résistance à la corrosion
Publication
Application
Priority
FR 9401448 A 19940209
Abstract (en)
[origin: EP0667401A1] A salt bath compsn., contg. nitrate anions and sodium and opt. potassium cations, used at 320-550 degrees C for surface oxidn. of esp. nitrided ferrous metal parts to increase their corrosion resistance, includes 0.1-5 (pref. 0.5-1.75) wt.% lithium cations substituting sodium or potassium cations.
IPC 1-7
IPC 8 full level
C23C 22/50 (2006.01); C23C 8/80 (2006.01); C23C 22/72 (2006.01); C23F 15/00 (2006.01)
CPC (source: EP KR US)
C23C 8/80 (2013.01 - EP US); C23C 22/72 (2013.01 - EP KR US)
Designated contracting state (EPC)
AT BE CH DE ES GB IT LI
DOCDB simple family (publication)
EP 0667401 A1 19950816; EP 0667401 B1 19971126; AT E160593 T1 19971215; CA 2141710 A1 19950810; CA 2141710 C 20000905; CN 1058061 C 20001101; CN 1112964 A 19951206; DE 69501084 D1 19980108; DE 69501084 T2 19980702; ES 2109781 T3 19980116; FR 2715943 A1 19950811; FR 2715943 B1 19960515; JP 3056965 B2 20000626; JP H07224388 A 19950822; KR 100295544 B1 20010917; KR 950032692 A 19951222; MY 111776 A 20001230; PL 177675 B1 19991231; PL 307080 A1 19950821; TW 303392 B 19970421; US 5514226 A 19960507
DOCDB simple family (application)
EP 95400204 A 19950201; AT 95400204 T 19950201; CA 2141710 A 19950202; CN 95101911 A 19950207; DE 69501084 T 19950201; ES 95400204 T 19950201; FR 9401448 A 19940209; JP 1410595 A 19950131; KR 19950001915 A 19950203; MY PI19950209 A 19950127; PL 30708095 A 19950203; TW 84100041 A 19950105; US 37589495 A 19950120