its color despite some wear,��� says Marc Aleksinas of Metal
Chem. The company���s Meta-Black EN was developed
as a room-temperature post dip designed to blacken
mid-phos Metal Chem electroless nickel.
Aleksinas says Meta-Black EN creates a thin black
nickel oxide film that is free of loose smut and maintains
integrity for more than 50 hrs neutral salt spray exposure (ASTM B117). A typical process cycle includes:
1. Electroless nickel plating using Meta-Plate Ultima
MP EN, 0.5-1.0 mil
2. 2x clean rinse (DI preferred)
3. Meta-Black EN, 75��F for 45-150 sec
4. 2x clean rinse (DI preferred)
5. Dry
���Adding a baking step can improve hardness and
wear resistance of the Meta-Black EN,��� Beavers says.
���Also, clear topcoats can provide better corrosion
protection and wear resistance as needed.���
Beavers and Hunter Cutchin discovered during testing that the black coating can be affected by substrate
metal and surface conditions. ���However, length of
Cutchin and Palmetto specialize in unique and oversize
parts, which often requires building special tanks.
pfonline.com 15