09:20 May-28-2009 Neil Burleigh Sales Krautkramer Australia Pty Ltd, Australia, Joined Dec 2002 149
Re: can we do ut shear wave on paint surfaceIn Reply to fresh at 07:38 May-28-2009 (Opening).
Yes it is possible to perform UT shear wave inspection on painted surface, but you must carry out a number of other inspections prior to the shear wave inspection.
1. compression wave inspection of paint steel interface to ensure uniformity of the bond.
2. paint thickness inspection of coating any large variations in coating thickness could cause mode conversion variations and or attenuation losses.
3. check for transfer losses/gains when comparing your cal block to your inspection surface. I myself have experienced a 10 -12 db transfer gain from steel test block to painted surface.
Hope this helps.
22:02 Apr-07-2014 Jorge Santin NDT Inspector, consultant Pró END Consultoria Ltda, Brazil, Joined May 2011 8
Re: Re: can we do ut shear wave on paint surfaceIn Reply to ARUN SADASIVAN at 19:52 Apr-07-2014 .
The refracted angle depends only the first and the last medium. If you calculate all interfaces you will have the same result. The paint change material attenuation (check transfer loss) and it depends on paint film thickness.