Will Heating Delaminate Aluminized Steel?

For the type you refer to Temperature reresistance to 400 °C without surface alteration.

I did not read all your post, so to try and answer the delaminating............and I am not exactly sure if this is correct for you as it refers to Hi Temperature Coating Cohesion which is up to 650 °C. And for (dx55d+AS) is 800 °C.

There is mention on the arcelomittal site, Adhesion:

Resistance to cracking on bending 3T (t < 2.25mm). 4T (t ≤ 1.25mm).

Try these sites out. You may have to plod through a lot of info' on the Corus site. Hope it is of use. And am still looking for specific temp for each grade.......

http://www.arcelormittal.com/fce/repository/transfer/EN_TDS_MCO_24022006.pdf

stay safe

babybear

with ref' to your specific question......."We use different grades of aluminised (dx51d,dx52d,54d and 56d). Will the melting point be different on each grade"?

The MP of these grades are from 419 °C to 450 °C. These are the critical temps!!!

If you burn off Polymer at 480 °C, it would tend to suggest some of the thinner grades will be lost because the temperature is too high and, some grades which may be thicker will be considerably thinned during the De-polymerisation process..

I have tried to find more accurate and specific information for each grade with regard to MP but this is all I could find.

I have not read any other posts in reply to yours but there may well be an expert on this very subject?.............Good luck

stay safe

babybear