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What coating is on my Aluminum Nickel Bronze parts?
I am trying to figure out what type of finish is on an existing part that I am redesigning. The geometry will change slightly but the base material (Aluminum Nickel Bronze) will stay the same & the finish will be the same. I have never had to "spec-out" a finish for this type of material. Since I am color blind I will try to describe the color & texture of the existing finish. It is a gold(ish) green color that you can see machining marks through & is "streaky" in consistency. I know it is for corrosion protection & hydraulic fluid protection. If I could get the SAE or MIL or ... specification for this finish it would help me decide what to place on my drawing. Oh, the material has very, very weak magnetic capabilities. Thank you very much!
Denny FallsEngineer - Woodland Park, Colorado, USA
2007
Hi Denny! Lee Gearhart metallurgist - E. Aurora, New York 2007 2007 Lacquers may be used on these alloys, but perhaps there isn't any applied coating. Aluminum bronzes are naturally gold color, and greenishness may be natural patination. Streakiness may indicate cast material or staining from fluids. Some common aluminum nickel bronzes having magnetic properties are given below, along with some common AMS, ASTM & SAE standards. Many MIL & QQ standards also exist (mostly canceled). - Goleta, California Finishing.com honored Ken for his countless carefully researched responses. He passed away May 14, 2015. Rest in peace, Ken. Thank you for your hard work which the finishing world, and we at finishing.com, continue to benefit from. |
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