AMES-POLISH

Electroless Nickel Cylinder Plating

Update, January 2007

In this process, nickel is chemically deposited on the interior of the cylinder as a phosphide complex. The finish used in this application is characterized by the following excellent features.

• Corrosion Resistance
• Non-porous
• Low Stress
• Passivation

It is recommended that the starting cylinder be new and have a surface with an SA rating of no less than 2.5. The cylinder is mechanically polished* to yield a surface Ra of less than 1 micron. Plating is accomplished using a unique process in which temperature and circulation are rigidly maintained and film deposition is controlled to a thickness of approximately one mil. The cylinder is passivated and finally capped. This treatment in no way affects the integrity or pressure rating of the container. A final pre-treatment such as a wash/bake/vacuum is always recommended before placing the container into service.

*Pre-polishing of the cylinder is required in all instances.