Thread adhesive patches for Trivalent chrome applications
Thread adhesive patches for Trivalent chrome applications
(OP)
CAn anybody faced a problem of thread adhesive patches poorly bonding on the surfcae of the trivalent chromium coated fasteners.
Whts is the root cause for this problem.? any soultions for the above problem.
Thanx inadvance for ur reply.
Baskar
Whts is the root cause for this problem.? any soultions for the above problem.
Thanx inadvance for ur reply.
Baskar





RE: Thread adhesive patches for Trivalent chrome applications
RE: Thread adhesive patches for Trivalent chrome applications
RE: Thread adhesive patches for Trivalent chrome applications
It is not chromium plating - it is chromate conversion coating of zinc plating. I haven't heard of any bonding problems with this.
Regards,
Cory
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
RE: Thread adhesive patches for Trivalent chrome applications
Thanks for the correction. It did sound mighty odd to me. I have heard people complain that trivalent chromate conversion does not give the same friction coefficient and therefore a different torque/tension relationship. From a chemical or physical point of view, the responsible mechanism, (if proved to be true), beats me.
RE: Thread adhesive patches for Trivalent chrome applications
One possible explanation for friction coefficient changes may relate to thickness. Hexavalent chromate conversion coatings come in various thicknesses (and change color from yellow/gold to olive), but most trivalent chromate coatings are very thin.
Regards,
Cory
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
RE: Thread adhesive patches for Trivalent chrome applications
regards,
baskar
RE: Thread adhesive patches for Trivalent chrome applications