08-30-2017, 08:11 AM,
|
|
RE: Aluminide Coating
(08-30-2017, 03:23 AM)achmadarifudinh Wrote: Hello guys. Have a great day
i have an issue about Aluminide Diffusion Coating. After heat treat aluminide coating the part there are appear green colour on part, usually black colour after heat treatment. For information we used sermalloy J for coating, and heat treat on 1000 degree celcius in argon atmosphere furnace with flow rate 22 CFH.
Could you help me, what the reason
Thanks a lot. Regards
You have too high an oxygen partial pressure in the oven. Aluminum is burned and the green chromium oxide layer forms on the surface. It can be due to leakage or poor argon quality.
|
|
08-31-2017, 02:19 AM,
|
|
achmadarifudinh
Active Member
|
Posts: 43
Threads: 19
Joined: Aug 2017
Reputation:
1
| |
RE: Aluminide Coating
(08-30-2017, 08:11 AM)Vadim Verlotski Wrote: (08-30-2017, 03:23 AM)achmadarifudinh Wrote: Hello guys. Have a great day
i have an issue about Aluminide Diffusion Coating. After heat treat aluminide coating the part there are appear green colour on part, usually black colour after heat treatment. For information we used sermalloy J for coating, and heat treat on 1000 degree celcius in argon atmosphere furnace with flow rate 22 CFH.
Could you help me, what the reason
Thanks a lot. Regards
You have too high an oxygen partial pressure in the oven. Aluminum is burned and the green chromium oxide layer forms on the surface. It can be due to leakage or poor argon quality.
Dear Mr. Vadim
Does the green colour in part will be affect on the quality of coating??
Thanks
|
|
08-31-2017, 11:53 AM,
|
|
RE: Aluminide Coating
(08-31-2017, 02:19 AM)achmadarifudinh Wrote: (08-30-2017, 08:11 AM)Vadim Verlotski Wrote: (08-30-2017, 03:23 AM)achmadarifudinh Wrote: Hello guys. Have a great day
i have an issue about Aluminide Diffusion Coating. After heat treat aluminide coating the part there are appear green colour on part, usually black colour after heat treatment. For information we used sermalloy J for coating, and heat treat on 1000 degree celcius in argon atmosphere furnace with flow rate 22 CFH.
Could you help me, what the reason
Thanks a lot. Regards
You have too high an oxygen partial pressure in the oven. Aluminum is burned and the green chromium oxide layer forms on the surface. It can be due to leakage or poor argon quality.
Dear Mr. Vadim
Does the green colour in part will be affect on the quality of coating??
Thanks
If your layer becomes green, it is already destroyed! Aluminum is burned and the layer has no effect at all.
|
|
09-06-2017, 01:00 AM,
|
|
achmadarifudinh
Active Member
|
Posts: 43
Threads: 19
Joined: Aug 2017
Reputation:
1
| |
RE: Aluminide Coating
Quote:You have too high an oxygen partial pressure in the oven. Aluminum is burned and the green chromium oxide layer forms on the surface. It can be due to leakage or poor argon quality.
Dear Mr. Vadim
Does the green colour in part will be affect on the quality of coating??
Thanks
Quote:If your layer becomes green, it is already destroyed! Aluminum is burned and the layer has no effect at all.
Thanks Mr. Vadim for your information
|
|
|