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Pre-Treatment For Aluminium

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 65°c
OLOSOL SERIES ACIDIC DEGREASING 25% v/v 10-15 MIN RT

Remarks

:-

1.For anodized and for those having large amount of oil, heavy duty ALKLIN chemicals should be used. This must be followed by desmutting process.

2.For non-anodized aluminium articles and for those having light to medium amount of oil,light duty ALKLIN chemicals or OLOSOL series of chemicals should be used.This may or may not be followed by desmuting process

Desmuting

:- Removal of smut and Oxide layer from aluminium surface.

PRODUCT NATURE CONC. TIME TEMP.
AL CLEANSER ACIDIC DESMUTING 2-5% v/v 5-15 MIN RT
AL CLEANSER C COMBINED DEGREASING-DESMUTING 2-5% v/v 5-15 MIN RT

For aluminium extruded sections,degreasing can be omitted as it does not have any oil but has smut and natural or anodic oxide coating

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
ALCHROM G GREEN CHROMATE COATING 3% v/v 8-10 MIN RT

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





Degreasing

:- Removal of Oil,Grease & Oxide lay form aluminium surface.

PRODUCT NATURE CONC. TIME TEMP.
AL CLEANSER C ACIDIC CLEANING 3-5% v/v 5-10 MIN RT

Conversion Coating

:- Gives amorphous conversion coating on aluminium surface.

PRODUCT NATURE CONC. TIME TEMP.
ALKOT CF CHROME FREE CONVERSION COATING 5% v/v 5-10 MIN 25 TO 45°C

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