Stripping of Diffusion Al-Si Coating on Superalloy
12-13-2008, 06:22 AM,
Stripping of Diffusion Al-Si Coating on Superalloy
dear freinds

i am new a member, i have a question about stripping of DIFFUSION Al-Si coating on superalloy, please help me how can i stripp and remove this coating?

12-13-2008, 01:44 PM,
RE: stripping
Hi khajeh

Sign0016 to the Surface Engineering Forum.

I think your only option here would be to grind the diffusion effected zone away. You will reduce the original pre-treatment dimensions of the component though. Diffusion treatments involve changing chemically the surface of the substrate material - the substrate becomes the "coating" as a posed to a thermal spray or paint coating being purely additive coatings which can in most cases be removed without effecting the original substrate size or chemistry. See Surface Engineering in a Nutshell for more info.

Hope that helps Smile
12-15-2008, 03:02 PM,
RE: stripping
You can use Nitric-Phosphoric Acid strip.

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