Gordon England Surface Engineering Forum

Re: impact temperature

Posted by Gordon England on February 17, 2004 at 18:03:01:

In Reply to: impact temperature posted by Michel on February 17, 2004 at 15:11:33:

: I would like to use a thermal spray aluminium coating for a special part. The problem I have is that this part presents a junction between steel and elastomer.
: The steel has to be well coated and for that purpose the coating has to be put a little on the elastomer close to the junction.
: The elastomer does not withstand high temperature. Hence Is anyone able to tell me if there will be a problem with such a coating application or not?
: Has anyone an idea of the temperature of the aluminium when impacting the part to be coated?

: Thank you in advance.

: Michel

Hi Michel

The temperature of the aluminium particles will be 650 C plus. If sprayed carefully, these particles "splat" and lose there heat extremely quickly and should not adversely effect the substrate material. So this aspect should not be a problem if the spraying process is set-up properly to take account of heat sensitive substrates.

Problems could occur depending on the elastomer and the surface preparation, as adhesion to these are generally poorer than to steel. The only real way of telling if there is going to be a problem with this application is to try it.

Regards Gordon

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