Detailed Product Description:
Alumiprep 33® is a non-flammable phosphoric acid-based cleaner, brightener
and pre-paint conditioner for aluminum. Alumiprep 33 produces a chemically
clean and corrosion-free aluminum surface.
Alumiprep 33 can be used to deep clean and brighten an aluminum surface prior
to welding, painting or to prepare the surface for a subsequent conversion coating.
Typical treatment time (defined as the time Alumiprep 33® solution is in contact
with the metal surface) is between two and five minutes. It is normally applied at
temperatures between room and 120°F. If drying does occur, re-wet the surface
with Alumiprep 33® solution, prior to water rinsing.
Alumiprep 33® solution should not be allowed to dry on the metal surface or
Permitted to re-oxidize prior to a thorough rinse. A thorough rinse with clean
water is necessary to remove both residual Alumiprep 33® solution and oils that
have been lifted from the metal surface.
A clean surface is a "water-break-free surface". The rinse water sheets out over
The aluminum surface, while oil remaining on the surface will cause the water to
bead up. Chemical cleaners will lift and break down oils on the surface and assist
in rinsing them from the surface on the metal.
Alumiprep 33® cleaning and conditioning chemicals will aggressively attack
Aluminum oxidation and corrosion to completely remove them, leaving a bright
clean metal surface. In the case of heavy corrosion, its removal can be aided by
the use of scrubbing. Often a Scotch-Brite pad is used for scrubbing.
For light oxidation and corrosion removal dilute one part Alumiprep 33® with
five parts water. For heavy oxidation and corrosion removal dilute one part
Alumiprep 33® with two parts water.
For each 100 parts of bath, add 25 parts of Alumiprep 33® to 75 parts of water.
Spray Application using 62-G Applicator:
Set dilution control on 3 allowing a mix of one part Alumiprep 33® to three
Before handling the chemical products used in the process, the first aid and
handling recommendations on the Material Safety Data Sheet for the product
should be read, understood and followed.
The processing bath is acidic. Do not get in eyes, on skin or on clothing. In
case of contact, follow the recommendations found in the Material Safety
Data Sheet for Alumiprep 33®.
Alumiprep 33® should not be used on high copper bearing aluminum alloys
or aluminum castings.
Acid resisting (rubber, stainless steel or plastic) buckets, troughs or other suitable
container should be used to hold the diluted Alumiprep 33® solution. Ordinary
steel pails may be used, but only for a short time. Galvanized containers should
not be used.
Operators should be equipped with rubber gloves, aprons and goggles to avoid
contact with the solution. Adequate ventilation should be provided.
Alumiprep 33® will freeze at 15° Fahrenheit. Freezing is not detrimental to the product.
It is recommended that the product be kept from freezing. However, should the
product freeze, simply thaw it in a warm place and stir it prior to use.
Waste Disposal Information:
Applicable regulations concerning disposal and discharge of chemicals should be
consulted and followed. Disposal information for the chemical products used in
this process is given on the Material Safety Data Sheet for each product.
Packed in 1-quart plastic bottle.
Click here to download pdf copy of MSDS
Click here to download pdf copy of Technical Process Bulletin