Pre-Treatment For Aluminium Casting

Degreasing

:- Removal of Oil,Grease & Oxide layer from aluminium surface.

PRODUCT	NATURE	CONC.	TIME	TEMP.
ALKLIN SERIES	ALKALINE DEGREASING	5% w/v	10-15 MIN	RT TO 60°c
OLOSOL SERIES	ACIDIC DEGREASING	25% v/v	5-15 MIN	RT

Remarks

:-

1.For light to heavy oil, light duty ALKLIN chemicals can be used. Desmuting step is compulsion with ALKLIN LD/LDS if used for heavy oil components. The same may be omitted for light oil.

2.For light to medium oil,OLOSOL SERIES of chemicals may be used. This does not require desmuting process.

Desmuting

:- Removal of Oil,smut and Oxide layer from surface-optional step.

PRODUCT	NATURE	CONC.	TIME	TEMP.
DI CLEANSER	COMBINED DEGREASING-DESMUTING	2-5% v/v	2-5 MIN	RT

Degreasing can also be omitted as this has combined degreasing desmutin properties.

Articles should not by any chance be kept in this series of products beyond specified period of time.

Chromating

:- Gives amorphous chromate coating on aluminium surface.

PRODUCT	NATURE	CONC.	TIME	TEMP.
ALCHROM Y	YELLOW CHROMATE COATING	1.5-2% v/v	5-10 MIN	RT

This coating prevents oxidation of aluminium die casting material and gives the necessary adhesion required for painting or powder coating.

Cleaning Coating

:- Removal of Oil,Grease & Oxide layer & giving amorphous conversion coating on the surface.

PRODUCT	NATURE	CONC.	TIME	TEMP.
KLINKOT KP	ACIDIC CLEANING PLUS COATING. CHROME FREE COATING .	5-15% v/v	5-10 MIN	RT

Advantages of the process

:-

The process is simple-user friendly.

Very short process cleaning and coating takes place in the same chemical.

The process does not require any external heating.

The chemicals are chrome free hence environment friendly.

All the chemicals are RoHS compliant.

Very good adhesion for paint / powder coating.