Adhesion testing
05-04-2015, 09:27 AM,
#1
Adhesion testing
Hello all,
we are using flame spraying of Molybdenum wire to steel core. Coated layer thickness is 0,07mm. And for that I would like to know how to evaluate (rate) the adhesion of the layer. Now we use bending test and "scuff" test. But I need some value (of adhesion) to compare different products / surface preparation / etc.
Standard scratch test show no result.
Have you any idea or experience?
Thank you
Reply
05-04-2015, 01:07 PM,
#2
RE: Adhesion testing
(05-04-2015, 09:27 AM)MartinFe Wrote: Hello all,
we are using flame spraying of Molybdenum wire to steel core. Coated layer thickness is 0,07mm. And for that I would like to know how to evaluate (rate) the adhesion of the layer. Now we use bending test and "scuff" test. But I need some value (of adhesion) to compare different products / surface preparation / etc.
Standard scratch test show no result.
Have you any idea or experience?
Thank you

Hi MartinFe,
There is a relatively simple method, the adhesive strength of similar layers to similar substrates to compare. In these tests, cross sections (layer + substrate ) be tested means Brinnel hardness test. Here Brinell ball is pressed on the interface between layer and substrate with a specific force. The higher the Brinell impression without cracks, the better the adhesion. This test is no value for the adhesive strength in MPa, but let the spray coatings well compare.

   
Reply
05-04-2015, 01:49 PM,
#3
RE: Adhesion testing
ASTM 633-01 is the standard used for measuring adhesion (bond strength) of a coating. It specifies the size of the coupon and the test method. A simple internet search will turn up many copies of the procedure.
Reply




Possibly Related Threads…
Thread Author Replies Views Last Post
  Adhesion to Shot Peened Titanium ServiceTech 1 3,774 02-10-2014, 10:48 PM
Last Post: KevinS
  How can adhesion of Gold Germanium alloy on GaAs substrate be improved??? xoobiii 0 4,005 02-21-2012, 12:09 PM
Last Post: xoobiii
  High Temp Adhesive for TSA Adhesion test wrjordan 3 7,402 07-22-2011, 06:51 PM
Last Post: MichiganMan
  Titanium adhesion Superspray 2 4,979 06-27-2011, 03:23 PM
Last Post: Superspray
  Non-stick and adhesion properties of coatings qwerty 2 7,356 12-15-2010, 06:46 AM
Last Post: ives



Users browsing this thread: 1 Guest(s)





Surface Engineering Forum Sponsor - Alphatek Hyperformance Coatings Ltd