This problem is called "thread galling." According to the Industrial Fastener Institute's 6th Edition Standards Book (page B-28), Thread galling seems to be the most prevalent with fasteners made of stainless steel, aluminum, titanium, and other alloys which self-generate an oxide surface film for corrosion protection.
www.estainlesssteel.com/gallingofstainless.html www.estainlesssteel.com/gallingofstainless.html
This results in mated parts “sticking” together and is responsible for “galling”. Thread galling can become severe enough that the mating parts seize, making it virtually impossible to separate them. Galling is a genuine problem which should be considered in design.
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Is this the right approach, or should I further investigate corrosion versus thread galling as the mode of failure? ...
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I am trying to determine if Colloidal Graphite in Isopropanol (MIL-L-24131) [CGI] can be used with stainless steel to prevent thread galling.
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We need to build a sensor that must be made from stainless steel, most likely 304L and it is to be threaded into a female aluminum thread by our customer. Because we can't control their thread condition we need to apply a coating to our stainless steel part to prevent galling failure of the aluminum.
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I am looking for methods to coat or plate stainless steel and /or nickel alloy threaded components under high torque makeup. Reasons for treating the threads are to reduce friction during make up and reduce instances of thread galling.
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2. Lubricating the internal and/or external threads frequently can eliminate thread galling. The lubricants usually contain substantial amounts of molybdenum disulfide (moly). Some extreme pressure waxes can also be effective.
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I’m sure many readers won’t be surprised; having sensed the death rattle as posting became less and less frequent over the past ... Within a couple of months we had thousands of people visiting every day. ... As much as we’ve enjoyed doing Threadbared Kimberly and I are both concentrating on other projects these days.
www.threadbared.com/ www.threadbared.com/
Daily chronicle of everything involved with custom shoes, sneakers, or footwear. For the customer, beginning or veteran customizer. ... After 18 entries and nearly 400 public votes the results of the 2nd Paint or Thread Custom Contest are in.
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ThreadMaster is a background service implementing a CPU Quota mechanism on top of the standard thread scheduling algorithms of the Microsoft Windows 2000 Operating Systems. ; A single user is capable of hogging all of the processor resources.
threadmaster.tripod.com/ threadmaster.tripod.com/