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coating or process for aluminum

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spaggioli

Mechanical
Dec 9, 1999
25
I have a need to apply a coating or process of some type to one or two pieces of aluminum in a plastic injection mold assembly to prevent galling. The components are made from Alumec 89 and operate at a maximum heat of 400 deg fahrenheit the clearance between the components can only be in the range of .0005 to .0010 of an inch. The mechanical operation of these two components are a reciprocating sliding motion with little to no-load. I have very little experience with aluminum. The key items for this coating or process should be.
1.) Friction reduction
2.) Little or know loss of thermal conductivity of the parent material.
3.) Durability

Some suggestions have been
Hard coating
Boron Electroless Nickel
Tufram from General Magnaplate

Any other suggestions or comments on the above would be appreciated.
 
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Spaggioli;
Your choice of base metal appears fine - the Alumec 89 is a tool grade of aluminium. If you want to have protection against galling, I would suggest looking into a Hard Anodizing (ceramic typ) coating on Alumec 89. I have used the following web site for plating specifications/information if you are interested;

 
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