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BLACK -N
For Nickel & Ferrous Metals |
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Black -N is a concentrated, rapid acting chemical conversion
liquid compound for blackening Steel and Ferrous Metal parts by Immersion
at room temperature. The product is a mildly acidic solution containing
no chromates, sulfides, cyanides, caustic or Phenols.
Preparation of the Black -N Solution:
Use an acid resistant container as the Immersion tank. Plastic,
plastic lined, glass or rubber lined are suitable. Do not use an uncoated
metal container. Black N concentrate should be diluted with water (10%
to 90% of water by volume). Although determined by individual testing,
a period of 10 to 60 seconds is needed to produce an uniform black finish.
The Immersion time can be shortened by using a more concentrated solution.
Important:
Black -N is not designed to clean surfaces. For best
results, parts must be free of oil and rust.
Preparation For Blackening and Sealing:
- Clean the part with Cleaner 104.
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- Immerse the parts in Black-N solution for 10
to 60 seconds. Agitate the parts to break air bubbles and to
assure solution contact with all surfaces. Plastic or plastic
lined baskets should be used for small parts.
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- Rinse thoroughly with over flowing cold water to stop the chemical reaction.
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- It is recommended that a protective lacquer, Trilac 747 or WSL-55 (clear or black, water soluble) be applied to the coating to provide maximum life.
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- The Black-N finish in itself imparts very little
corrosion resistance to the Iron or Steel surface. However,
its crystalline structure is porous and will absorb the sealant
or lacquer, promoting long term corrosion resistance.
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Solution Control:
The blackening process with Black N is a chemical reaction
between the solution and metal surface. Chemical activity is gradually
diminished as the solution is used but may be restored to the desired
strength by adding fresh concentrate. When Immersion time necessary
to produce the desired black is increased, add sufficient concentrate
to reduce Immersion time to your previous standard. Keep a record of
additions to establish a bath history.
Caution:
Black N concentrate and the process is mildly acidic. Precautions
for handling this type of material should be observed (corrosive). Avoid
contact with skin and eyes. Use protective clothing (aprons, face and
eye shields, rubber gloves) when handling chemical material. In case
of contact with skin, flush area with large amounts of water; for eyes,
flush with large amounts of water and get medical attention. The
solution should be considered toxic if taken internally!
The information stated herein is based on information and tests we believe to be reliable. The accuracy or completeness thereof is not guaranteed. Since conditions of use are outside our control, user shall, before using, determine the suitability of the product for his intended use and user assumes all risk and liability in connection therewith.
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