From: AlanG > We tested the Aramco coating in our experiments at HUG in February 2015. It was moderately effective but was found to degrade over time at 900°C. See the image at https://drive.google.com/open?id=0BxxJkjesxe4kUUJubGlNaEZ1VVU
Alan, This image appears to shows a bleaching of the coating, but it is not clear if this actually changes the emissivity - and that situation would be strongly at odds with the information on the suppliers website. Is it possible you chose the wrong product (# 840-C is for one for ceramic surfaces)? At any rate, it would be a huge mistake not to apply a high emissivity coating prior to testing. The worst that could happen with such a coating is highly preferable to doing nothing at all. Jones
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