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1. (DE000010116762) Aluminum-titanium diffusion layers, used for improving corrosion resistance of metallic materials used in refinery for gasifying coal, petroleum coke or other residual materials, are produced by co-diffusion

Office : Germany
Application Number: 10116762 Application Date: 04.04.2001
Publication Number: 000010116762 Publication Date: 23.01.2003
Publication Kind : C1
IPC:
C23C 10/52
C23C 16/08
C23C 14/14
C CHEMISTRY; METALLURGY
23
COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
C
COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
10
Solid state diffusion of only metal elements or silicon into metallic material surfaces
28
using solids, e.g. powders, pastes
34
Embedding in a powder mixture, i.e. pack cementation
52
more than one element being diffused in one step
C CHEMISTRY; METALLURGY
23
COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
C
COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
16
Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition (CVD) processes
06
characterised by the deposition of metallic material
08
from metal halides
C CHEMISTRY; METALLURGY
23
COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
C
COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
14
Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
06
characterised by the coating material
14
Metallic material, boron or silicon
CPC:
C23C 10/52
Applicants: DECHEMA
Inventors: SCHUETZE MICHAEL
WEBER TILL
Priority Data:
Title: (DE) Korrosionsbeständige Al-Ti-Diffusionsschichten
(EN) Aluminum-titanium diffusion layers, used for improving corrosion resistance of metallic materials used in refinery for gasifying coal, petroleum coke or other residual materials, are produced by co-diffusion
Abstract: front page image
(DE)

In verschiedenen Prozessen der chemischen Industrie und der Energieerzeugung herrschen hochgradig reduzierende und sulfidierende Bedingungen mit hohen Kohlenstoffaktivitäten, so daß bei den herkömmlichen Apparatebaustählen eine Beschränkung der oberen Einsatztemperatur auf etwa 400-500 DEG C notwendig ist. Die entwickelte Al-Ti-Diffusiuonsschicht erlaubt Einsatztemperaturen bis 700 DEG C. DOLLAR A Die Al-Ti-Diffusionsschicht wird im Kodiffusionsverfahren aufgebracht. DOLLAR A Chemische Industrie, Energieerzeugung.


(EN)

Aluminum-titanium diffusion layers are produced by co-diffusing the diffusion elements aluminum and titanium as pure metal powder in a weight ratio of 1: (0.1-5). Preferred Features: The layer is produced using a powder packing process. Activators, preferably ammonium halides, especially aluminum or titanium halides are used to produce the diffusion layers.