Surface Preparation of Aluminium
04-16-2015, 10:21 AM,
Surface Preparation of Aluminium

I've been browsing this forum for the past several weeks and there seems to be a host of very useful information. I am rather impressed by the level of expertise - now, a question for the pro's Big Grin

I am looking for a surface preparation method for Aluminum Alloy 6061
(Datasheets: link dead).

The specific application is for protective coatings. Phosphoric acid oxidization according to BAC 5555 (ASTM D3933-98) was already attempted but unfortunately I cannot achieve a constant voltage while running a current <2A. I believe this is required to obtain the desired properties; please correct me if I'm wrong. Further, the process has several steps and very time consuming.

It would be a huge help if anyone could recommend parameters for grit-blasting. Based on my review, alumina grit can provide a sufficiently rough surface for adhesive bonding, but there is the issue of contamination. I have an ultrasonic cleaner at my disposal and pressurized air. From what I've found online, it might be worth trying: blasting angle of 30-40 degrees, separation distance 150-200mm.

What blasting parameters can you recommend for Aluminum Alloy 6061?

Thanks in advance Smile

05-04-2015, 12:39 PM,
RE: Surface Preparation of Aluminium
05-09-2015, 01:59 PM,
RE: Surface Preparation of Aluminium
A little more info is needed to help.
When you say contamination, do you mean interface contamination?
What type of blasting system are you using? (pressure or suction)
What air pressure are you using? typically the pressure type is around 25psi and suction type is around 60psi.
What is the size of your blast nozzle? 1/4" is good
What size media? somewhere between 24grit and 54 grit works well.
Your blasting angle and distance looks good. Make sure you don't dwell.

Possibly Related Threads…
Thread Author Replies Views Last Post
  Substrate preparation VS bonding strength plzc126330 2 2,068 01-09-2018, 03:48 AM
Last Post: plzc126330
  Good preparation for cast iron base material plzc126330 3 2,509 11-24-2016, 01:17 AM
Last Post: plzc126330
  metallographic preparation volf 2 6,568 01-25-2012, 12:48 PM
Last Post: jonini
  Cr3C2 Ni-Cr coating on Aluminium ehsan 4 5,381 10-19-2011, 12:50 PM
Last Post: ehsan
  Surface preparation before spraying HVOF minh_8888 4 7,734 06-20-2011, 12:18 PM
Last Post: Met.Eng.
  Surface Preparation Coolguy 3 4,303 02-08-2011, 07:47 PM
Last Post: MichiganMan
  coating aluminium composite panel nicubila 2 7,439 12-13-2010, 08:14 AM
Last Post: Fydor75
  Surface preparation and its effect on fatigue life and bond strength WMW 4 7,252 06-29-2010, 08:41 AM
Last Post: drramc
  Coating freak Off From Aluminium Eagleman 5 5,238 04-25-2010, 02:29 PM
Last Post: Gordon
  Aluminium properties Yukawa 4 9,626 11-10-2009, 12:19 PM
Last Post: Yukawa
  Aluminium coating exnnerspray 5 13,048 05-06-2009, 04:42 PM
Last Post: Gordon
  aluminium coating 123raoel 3 4,986 04-21-2009, 12:47 PM
Last Post: Gordon
  Coatings for aluminium bshah 4 6,419 11-17-2008, 07:06 PM
Last Post: Gordon
  Spraying Pure Aluminium J_rock 1 4,691 08-05-2008, 02:51 PM
Last Post: Gordon
  Porous Machined Surface on Part Lower Inner Diameter on Inco 718 Coating Surface Alexangel1226 4 7,457 03-19-2008, 02:05 PM
Last Post: Gordon

Users browsing this thread: 1 Guest(s)

Surface Engineering Forum Sponsor - Alphatek Hyperformance Coatings Ltd