Corrosion-proofed sheet steel and method for production thereof

• Main Authors: WERNER BE, JURGEN STAHL, OTMAR ZIMMER, GUIDO GRUNDMEIER, BERND SCHULTRICH, DIETRICH WOLARD, MATTHIAS KRETSCHMAR, MANFRED KAMMER, BERND SCHUHMACHER, PETER SIEMROTH, STEFFEN SCHENK, CHRISTIAN SCHWERDT, ROLF BRISBERGER, ULF SEYFERT
• Format: Patent
• Language: English
• Published: 25.02.2002
• Edition: 7
• Subjects: CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION

The invention relates to a corrosion-proofed sheet steel and a possible method for production thereof, in particular in a continuous process. According to the invention, local concentrated deposits (1) of metals or alloys of said metals with an inhibiting effect on the speed of corrosion of the zinc or zinc alloy coating are produced in the zinc or zinc alloy coating on the corrosion-proofed steel sheet, whereby local melts occur, by means of a deliberate local formation of a multi-phase alloy with lower melting point than that of the unaffected zinc or zinc alloy coating. The deposits (1) are formed from the above after solidification thereof during the cooling of the coating.