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- Registered: 10/30/2007
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Re: Adhesion testing curved surfaces
:confused:
Hi and thank you for having me in the forum, this is my first post so here goes...
I am looking for a method to test the adhesion of electroless plating on a small radius curved surface, my substrate is effectively a 1/8" wire and I'd like to test how strong my adhesion really is.
Tape testing is not successful for two reasons, firstly the tape is wide and only touches a small part of the wire, if the tape is pressed around the sides of the wire it is no longer a true test. Secondly as the wire is only 1/8" thick, it is inclined to flex as the tape is pulled leading to a false result.
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- Registered: 11/14/2007
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Re: Adhesion testing curved surfaces
I have not tested wire, but two thoughts come to mind. A radial bend test. Bend the wire around a large radius, then inspect for fractures. Progress in smaller radius bends until you observe fractures or lifting in the powder. You will need to determine what your requirement is.
You could try a nickel test. Take a five cent piece and pull the edge of the nickel along the wire. This is more of a test for curing, but it should work for adhesion.
- Title: Member
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- Registered: 06/22/2007
- From: T-town, OK
- Posts: 55
Re: Adhesion testing curved surfaces
I ran this question by another industry expert while in New England today......you could consider pulling wire through a die smaller than the diameter of the wire, if adhesion is accomplished, the nickel coating will compress and stretch with this test, if not, it will POP like the blister that it is!!!!! 'nuf said?
later.
Skelton, hOST
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- Title: Moderate All
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- Registered: 06/19/2007
- From: Rutherfordton, NC (Small Town
- Posts: 60
Re: Adhesion testing curved surfaces
"3"
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