Powder build up on powder port
09-14-2018, 10:31 AM,
#1
Powder build up on powder port
Hello everybody,

We are spraying a CrC-NiCr coating with a 7MB gun for a long time now.
But recently we have the problem that the powder is building up at the powder port, so it blocks eventually.
Does anybody has a clue what is happening there?

If I lower the hydrogen flow, I get to many unmelted particles in my coating (and it is not that high at this moment: 5 NLPM).

Thank you for any help!

Kind regards,
Ruud Lammers
Reply
09-14-2018, 12:10 PM,
#2
RE: Powder build up on powder port
(09-14-2018, 10:31 AM)ruudlam Wrote: Hello everybody,

We are spraying a CrC-NiCr coating with a 7MB gun for a long time now.
But recently we have the problem that the powder is building up at the powder port, so it blocks eventually.
Does anybody has a clue what is happening there?

If I lower the hydrogen flow, I get to many unmelted particles in my coating (and it is not that high at this moment: 5 NLPM).

Thank you for any help!

Kind regards,
Ruud Lammers

Hi Ruud,
It may be that your powder has become finer or contains now more fine particles than before.
Also possible that the hole of powder nozzle has become larger due to wear (slower feeder gas flow).

You can solve the problem by increasing the flow to feeder gas.
Reply




Possibly Related Threads…
Thread Author Replies Views Last Post
  SF Aluminum powder Equivalent Lars.Patrick 1 544 02-16-2024, 11:46 AM
Last Post: adam wintle
  used powder feeder noblepowder 0 739 07-19-2023, 12:06 PM
Last Post: noblepowder
Bug Praxair powder feeder 1264 malfunction JeroenB 1 1,489 02-10-2023, 12:06 AM
Last Post: dawgpound
Bug Praxair powder feeder 1264 malfunction JeroenB 0 856 01-25-2023, 02:23 PM
Last Post: JeroenB
  Co28Mo17Cr3Si powder William 19 23,274 06-14-2022, 01:36 PM
Last Post: Vadim Verlotski
  metco 101bns powder / tensile strength RogerMilam 6 6,819 05-08-2022, 07:53 PM
Last Post: landemarre
  Powder Identification joe plasma 2 3,001 04-26-2021, 05:38 PM
Last Post: loriolo
  SC 3464 powder equivalent is ???? achmadarifudinh 1 2,766 09-10-2020, 09:55 AM
Last Post: Vadim Verlotski
  Powder stabilization time and coating time limit nicholasktc 1 2,129 06-25-2020, 12:59 PM
Last Post: Lemster68
  9mpe powder feeder Longman1 4 3,236 10-07-2019, 11:23 PM
Last Post: ServiceTech
  Metco powder code selection GuadalupeSullivan 1 4,322 06-27-2019, 10:24 AM
Last Post: loriolo
  Powder deflection 3MB Lemster68 2 2,434 03-11-2019, 01:31 PM
Last Post: Lemster68
  Sulzer Metco 58NS Copper-Nickel-Indium alloy powder question RaymondF2 1 3,602 09-05-2018, 04:35 PM
Last Post: ServiceTech
  Calculating Required Powder for Coating Mud rotors demionkrishan 5 4,452 06-26-2018, 02:36 PM
Last Post: sprayloud
  Silicon Powder Clogging Tom Bruce 2 3,049 02-13-2018, 11:15 AM
Last Post: adam wintle



Users browsing this thread: 1 Guest(s)





Surface Engineering Forum Sponsor - Alphatek Hyperformance Coatings Ltd