CLEANERS

ACID SALT AF

ACID SALT AF is a fluoride containing acid salt designed to replace hydrofluoric acid solutions in a variety of applications. Excellent acid activator for stainless steels, nickel alloys, nickel plate, titanium and magnesium.

As an etchant and smut-removing additive for aluminum, Acid Salt AF is ideal.

BENEFITS

• Granular acid salt, no hazard in handling when compared to hydrofluoric acid solutions.
• Readily soluble, miscible with all mineral acids and acid salts.
• Versatile.
• Activates difficult-to-plate alloys and metals, e.g., stainless steel.
• Free-flowing, good rinsing.
• Performs well in hard water.
• Contains no phosphates, chelaters, chromates, or chlorides.

EQUIPMENT

1. Acid Salt AF mixtures with oxidizing acids, e.g., nitric acid.

   Tanks:	polyethylene or rigid PVC.
   Ventilation:	required.
   Heaters:	Karbate or equivalent.

2. Acid Salt AF mixtures with non-oxidizing acids, e.g., Sulphuric or Hydrochloric.

   Tanks:	PVC or rubber-lined steel.
   Ventilation:	recommended.
   Heaters:	Karbate or equivalent.

METHOD OF CONTROL

Analysis of Acid Salt AF/Nitric Acid Solutions:

1. Pipette 1 ml aliquot of the solution into a polyethylene beaker.
2. Add 3 to 5 drops of methyl orange indicator and titrate to a yellow end-point with 0.1N sodium hydroxide. This is reading "A".
3. Pipette another sample into a large (500-600 ml) polyethylene beaker. Add 200 mls of water and 2 drops of alizarin indicator.
4. Add 1N sodium hydroxide until colour turns red.
5. Add 0.5% HCl until solution just turns yellow.
6. Add 2 mls of buffer solution (Chloracetic acid 94.48 g/litre plus sodium hydroxide 2 g/litre) then titrate with 0.1N thorium nitrate to a red end-point. This is reading "B".

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