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Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ
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Need coating on titanium fine threads to prevent cold welding




2007

Hi,
I need to coat three pieces of titanium works with special coating, so that they will not cold weld together between the threads. I have two sets of threads. They are 1/2-56 and 3/8-80. A guy in our shop make the pieces and put them together. They end up all cold welded. The size of these three pieces are 0.625" OD by 1.150", 0.515" OD by 1.000", and 0.377" OD by 0.695". Each piece either have both female-male thread or just male thread.

I am in Ithaca, NY. I want to know what kind of coating I need, so that cold weld will not happen to our piece. Please also let me know where I could get the coating done.

Thank you and best wish,

LiHong Huang Herman
Cornell Applied Physics Gradstudent - Ithaca, New York, USA

Ed. note: Sorry, this RFQ is old & outdated, so contact info is no longer available. However, if you feel that something technical should be said in reply, please post it; no public commercial suggestions please ( huh? why?)



August 2013

Hi LiHong. I believe that the coating you are looking for is alkaline anodizing per AMS 2488. Titanium can also be acid anodized with a very thin diffraction coating for decorative and jewelry use, but that's not the coating you are looking for. Good luck.

Regards,

Ted Mooney, finishing.com
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey


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