Gas line control system with anodized surfaces

Abstract

A process control valve manufactured using an aluminum alloy and used to maintain a supply side pressure and a delivery side pressure in a fluid supply line. The control valve includes a pneumatic actuator having a first pressure chamber and a second pressure chamber used to operate the process control valve, a delivery side sensor for determining a delivery side pressure, and a hardcoat anodized layer on aluminum alloy surfaces to create a barrier and reduce electrolysis and aluminum corrosion, The hardcoat anodized layer penetrates the aluminum alloy surfaces. Preferably, the hardcoat anodized layer has a thickness in the range of 0.0007 inch to 0.0012 inch, Most preferably, the hardcoat anodized layer has a thickness of about 0.001 inch. The hardcoat anodized layer penetrates the aluminum alloy surfaces to a depth in the range of 0.0007 inch to 0.0012 inch, most preferably to a depth of 0.001 inch.

Dependencies are inferred from the claim text.