Gordon England Surface Engineering Forum



Re: adhesion of coatings

Posted by Gordon England (62.252.0.12) on 18:36:51 13/01/06

In Reply to: adhesion of coatings posted by Alecxei Goncharov

Hi Alecxei
Thank you for comments.
The effects of substrate and coating coefficient of thermal expansion, temperature and heat flow etc. are important considerations with regard to stress development. Preheating of the substrate prior to spraying is generally advised: one to provide a dry and more active surface for bonding and two to expand the substrate to counteract slightly the tensile stresses developed in many coatings.
Regards Gordon



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