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» Corrosion Protection of Aluminuim Components

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

25-33% v/v

10-15 min

RT

Remarks :-

  1. For anodized articles 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 window 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% v/v

5-7 min

RT

ALCHROMG

Green Chromate Coating

3% v/v

8-10 min

RT

This coating prevents oxidation of aluminium.