6 Good Formulations Of Aluminium Cleaners For Metal Pickling
1. Aluminium Cleaners Formulation I
Oxalic acid = 1-20 parts
Sodium bifluoride = 1-20
Soap, capable of liberating fatty acids in solutions = 1-20
At least40% of the fatty acids should besaturated.
Add about 9 to 39 parts of some finely ground abrasive.
2. Aluminium Cleaners Formulatioin II
Nitric acid (42°Be’) = 0.3 - 1 Pt.
Sodium sulphate(hydrate) = 8-16 oz
Water = 1 gal
Operating conditions :
Temperature of bath = 170-175°F
Immersion time = 4-8 minutes.
3. Aluminium Cleaners Formulation III
Butyl cellosolve = 4.0
Tergitol nonionic NPX = 3.0
Phosphoric acid (85%) = 3.0
Citric acid = 4.0
Water = 1 gal
Sodium chromate = trace
4. Aluminium Cleaners Formulation IV
Chromic acid = 6-12 oz
Sulphuric acid (66°Be) = 1.2-1.5 pt
Water = 1 gal
Operation conditions :
Temperature of bath = 110-180°F
Time upto 20 mm.
5. Aluminium Cleaners Formulation V
Nitric acid (42°Be’) = 4-6 Pt.
Hydrofluoric acid (48%) = 3-24,11. oz.
Water = 1 gal
Operation conditions :
Temperature Room
Immersion time = 1.5 minutes.
6. Aluminium Cleaners Formulation VI
Sulphuric acid (66°Be) = 0.8 Pt.
Hydrofluoric acid = 3,11. oz.
Chromic acid = 8 oz.
Water = 1 gal
Operation conditions :
Temperature of bath = 150-160°F
Immersion time = 2-5 minutes
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