Thermal Spray Chemical Striping Product
05-02-2019, 08:07 AM, (This post was last modified: 05-03-2019, 09:59 AM by achmadarifudinh.)
#1
Thermal Spray Chemical Striping Product
Hello guys, i hope you get a good day

I have some case about removal coating in blade, vane, other industrial gas turbine which coated by plasma spray specially in bond coat of thermal barrier coating.

I already search in this forum, there are many discussion about chemical striping but not in thermal barrier coating industrial gas turbine. So i make this post.

I do mechanical cleaning process with aluminum oxide grit 60 and its heat treated in vacuum furnace with 1150 degree celcius holding 4 hour and gas quenching for solution heat treatment before perform repair process like welding process, dressing with burr tools.
And my vacuum furnace so dirty, there are like paper burned in induction heater. and in support stand there are some green defect.
maybe you can help me to identify, is it a residual bond coat still exist in vane segment after mechanical cleaning + heat treatment ?? (see photos attached).
   
   
And i learn then found paper discuss about NiCrAlY chemical striping "Chemical stripping methods for the removal of NiCrAlY Thermal Spray Coatings" this research from Turbocoating, Italy.
Maybe any product and experience for chemical striping in thermal spray in industrial gas turbine. or send me email to achmad.ah@gmf-aeroasia.co.id

I hope get the best reply with my case
Thank you guys
Regards

Achmad Arifudin H
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