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| Abstract No.: |
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Scheduled at:
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Thursday, September 29, 2011, Saal C2.2 9:00 AM
Pre- & Post-Treatment 2
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| Title: |
Polymers in thermal spray
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| Authors: |
Larry F Grimenstein* / Nation Coating Systems, Inc., Ohio
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| Abstract: |
Over the years polymers have been used in thermal spray coatings. The most known usage is to seal porosity in thermal spray materials. The sealers mostly used do not really work because they do not penetrate very far into the coating. Once the coating is machined or ground, the sealer is gone and we have a porous coating due to fail. One major sealer resin system uses Phenolic as the resin. That resin is older than most of the audience and the system is loaded with flammable acetone. It also is not a high temperature material nor does it last long since it is a rigid material and does not expand or contract. The old sealers mostly had solvent systems in them and were replaced with a new water born polymer. Water systems sound good environmentally but they do not penetrate very deep and really do not work well for this application. Later polyester was used with a ceramic filler to produce an self-lubricating coating for turbine applications. More recently higher temperature polymers were used to create a hi-temp coating. However, our industry has not kept up with the technology of resin based systems. I want to show you some new polymeric material's applications and also recommend additional work for the thermal spray industry for improved applications using the technology of tomorrow.
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