Fuel Injection Housing
Injection pumps used in diesel engines are mostly made of cast aluminum plated with an electroless nickel coating. The pumps are driven indirectly by gears or chains from the crankshaft and operate at very high pressures. Electroless nickel coatings are used when you need a excellent corrosion and wear protection. In addition, electroless nickel deposits a uniform thickness over the entire part without the need for expensive anode fixturing.
Typical Process Sequence with Recommended Products (Requirement):
Substrate | >> Cast aluminum |
Cleaning | >> Alkalume® Cleaner 143 |
Etching | >> Alklean 77 or Alklean AC-2 |
Desmutting | >> Desmutter NF 2 |
Zincate | >> Alumseal® 650 |
Zincate Strip | >> Alumseal® Activator BD |
Plating | >> EDEN® 200 |
Diesel Cylinder Liners
Diesel cylinder liners are hard chromium plated to provide excellent wear resistance and a low coefficient of friction. The need to replace these components has been greatly reduced since the advent of this surface coating.
Typical Process Sequence with Recommended Products (Requirement):
Substrate | >> Cast iron |
Cleaning | >> UniClean® or TRI-MAX® series |
Activation | >> Etching in chromic acid solution |
Plating | |
Post Plate Finishing | >> Honing |