Need advice on unmelt particles in Metco 58 coating
10-17-2012, 10:23 AM,
#1
Need advice on unmelt particles in Metco 58 coating
I have problem with unmelt particles in Metco 58 coating. The poosity % is 1 to 2 and not associated with the unmelt particles.

The coating is sprayed with 9MB gun without cross air jet.
Will the cooling affect? And i am thinking to use sieved powder.

Kindly advise how to reduce the unmelt particles. Thanks.
Reply
01-08-2013, 04:14 AM,
#2
RE: Need advice on unmelt particles in Metco 58 coating
You can increase the power if the oxide requirement is not too high(current first, if not work,then gas ).9M has a high power,unmelted may not be a big problem.
Reply
01-09-2013, 06:25 PM,
#3
RE: Need advice on unmelt particles in Metco 58 coating
Hi Vivian
Try first a check for geometry and parameters (GH nozzle, cross jet 114 mm, etc. if you use 9MB gun) and see if everything are Ok, this powder is difficult to set, because is a copper/nickel/indium powder and Cu oxidize easily, so if everything are ok, then tray reducing powder rate from 44 maybe to 42gr/minuteā€¦40 and so on
Best regards
Luigi
Reply




Possibly Related Threads…
Thread Author Replies Views Last Post
  Too many small particles in my coating devil72 1 2,181 08-04-2020, 11:54 AM
Last Post: Vadim Verlotski
  Reduce unmelted particles in Combustion Wire Spray Alberto Villalobos 8 8,388 05-19-2014, 07:21 PM
Last Post: KevinS
Information Hydraulic Shaft - Thermal Spray - Advice needed Jagdeep 2 5,131 10-09-2013, 07:16 PM
Last Post: shantanu
  Metco 58NS unmelt particles thezombiesprayer 8 9,707 10-20-2012, 09:37 AM
Last Post: Spraytube
  Engineering student looking for advice Q23Q 1 3,543 10-10-2011, 11:36 AM
Last Post: EmaEsabel
  Corrosion Potential - Help and advice needed! freckle 4 6,606 08-11-2009, 05:17 PM
Last Post: freckle
Sad Dark grey particles in Ni-Al bond coat? fhyuan 9 12,286 01-18-2009, 07:02 PM
Last Post: Gordon
Question 88WC - 8Co - 4Cr Removal Advice Batsy 2 7,589 02-05-2007, 09:21 AM
Last Post: Batsy



Users browsing this thread: 1 Guest(s)





Surface Engineering Forum Sponsor - Alphatek Hyperformance Coatings Ltd