IPC 6 English version  C23D-C23D01700
SECTION C– CHEMISTRY; METALLURGY

C 23

COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL (by metallising textiles D 06 M 11/83; decorating textiles by locally metallising D 06 Q 1/04); CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL (for specific applications, see the relevant places, e.g. for manufacturing resistors H 01 C 17/06); INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL (treating metal surfaces or coating of metals by electrolysis or electrophoresis C 25 D, C 25 F) [2]

C 23 D

ENAMELLING OF, OR APPLYING A VITREOUS LAYER TO, METALS (chemical composition of the enamels C 03 C)

1/

00

Melting or fritting the enamels; Apparatus or furnaces therefor

1/

02

. 

Granulating the melt; Drying the granules
Coating with the enamels

3/

00

Chemical treatment of the metal surfaces prior to coating (cleaning or de-greasing of metallic objects C 23 G)

5/

00

Coating with enamels or vitreous layers [4]

5/

02

. 

by wet methods

5/

04

. 

by dry methods

5/

06

. 

producing designs or letters

5/

08

. 

Applying enamels non-uniformly over the surface

7/

00

Treating the coatings, e.g. drying before burning
Firing the enamels

9/

00

Ovens specially adapted for firing enamels

9/

02

. 

Non-electric muffle furnaces

9/

04

. 

Non-electric tunnel ovens

9/

06

. 

Electric furnaces

9/

08

. 

Supporting devices for burning-bars

9/

10

. 

Loading or unloading devices

11/

00

Continuous processes; Apparatus therefor
After-treatment

13/

00

After-treatment of the enamelled articles

13/

02

. 

Removing defects by local re-melting of the enamel; Adjusting the shape

15/

00

Joining enamelled articles to other enamelled articles by processes involving an enamelling step

17/

00

De-enamelling
 ^