chrome plate thickness on hydraulic actuator piston
chrome plate thickness on hydraulic actuator piston
(OP)
Is there a typical thickness used for chrome plating on pistons for hydraulic actuators? I know QQ-C-320 specifies .002 min if not otherwise specified on the drawing, but I have another design reference that specifies .001 min. Which is more typical for an actuator subject to medium wear or exposure (eg: internal use)?
Thanks
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RE: chrome plate thickness on hydraulic actuator piston
RE: chrome plate thickness on hydraulic actuator piston
RE: chrome plate thickness on hydraulic actuator piston
RE: chrome plate thickness on hydraulic actuator piston
I do not work in the aerospace industry, so please take this as background info only: hard chromium plating is often specified at a thickness of 25 micrometers (0.001 inches) for general use hydraulic actuators/piston rods. By general use, I mean acutators/piston rods for automotive and industrial hydraulic dampers, gas springs, etc. The thickness requirements that israelkk indicates may be more prevalent in aerospace usage, although I thought these were only for really heavy applications like landing gear struts/actuators.
RE: chrome plate thickness on hydraulic actuator piston
This is interesting that for commerial use the typical thickness is 0.001 inch (0.025 mm). As brin (Aerospace) stated QQ-C-320 specifies 0.002 inch (0.05 mm) min if not otherwise specified on the drawing. Meaning that larger thicknesses are common or recommended in the military/aerospace applications.
RE: chrome plate thickness on hydraulic actuator piston
In general then, is the chrome plating thickness only a function of expected wear between overhauls? eg: the chrome plating surface is a sacrificial coating that can be renewed before any wear or scratch defects penetrate the base material? It is not a function of the load, speed, etc?
RE: chrome plate thickness on hydraulic actuator piston
RE: chrome plate thickness on hydraulic actuator piston
RE: chrome plate thickness on hydraulic actuator piston
Have you given any thought to and HVOF coating instead of chrome? It has pretty much become the standard in the aircraft industry now, due to ecological reasons, cost, turn around time, and part life. An HVOF carbide coating is really tough and lasts much longer than chrome.
Regards,
Jim