where expertise comes together - since 1996 -

The Largest Open Access Portal of Nondestructive Testing (NDT)

Conference Proceedings, Articles, News, Exhibition, Forum, Network and more

where expertise comes together
- since 1996 -

GB Inspection Systems Ltd.
A leading UK manufacturer of Ultrasonic Probes, Accessories, Supplier of NDT Equipment and more.

602 views
Technical Discussions
Christophe Mattei
Consultant
Exova AB, NDT Dpt., Sweden, Joined Jan 2001, 8

Christophe Mattei

Consultant
Exova AB, NDT Dpt.,
Sweden,
Joined Jan 2001
8
00:38 Jun-19-2002
Wetting of polymer to avoid airbubbles indication with US inspection

Hello,

I'm looking for info on ways to improve the wetting of polymer (more specifically explosiv plastic) in order to avoid false indications coming from air bubbles while scanning the part with ultrasound. Any reference or comment appreciated!

Chistophe Mattei
CSM Materialteknik AB



    
 
 
Tom Nelligan
Engineering,
retired, USA, Joined Nov 1998, 390

Tom Nelligan

Engineering,
retired,
USA,
Joined Nov 1998
390
05:20 Jun-19-2002
Re: Wetting of polymer to avoid airbubbles indication with US inspection
: I'm looking for info on ways to improve the wetting of polymer (more specifically explosiv plastic) in order to avoid false indications coming from air bubbles while scanning the part with ultrasound. Any reference or comment appreciated!

First, I assume that the bubbles are clinging to the surface of the material rather than outgassing from it. Also, I assume that you are using de-aerated water (or water that has been standing for a day or so) to avoid outgassing from the water.

I have no specific experience with scanning explosive plastics, but as a general suggestion, we sometimes use a very weak soap solution to break up surface tension when bubbles are clinging to the surface of a textured specimen. That minimizes the tendency of bubbles to cling to a surface. Just wet the surface of your test material with the solution before you put it in the test tank. Note that the concentration should be weak -- typically a couple drops of liquid soap in a liter of water is sufficient to break the surfacetension.

--Tom Nelligan
Panametrics, Inc.


    
 
 
David Hermanutz
Consultant,
Hbndt.com, China, Joined Jul 2012, 85

David Hermanutz

Consultant,
Hbndt.com,
China,
Joined Jul 2012
85
06:10 Jun-19-2002
Re: Wetting of polymer to avoid airbubbles indication with US inspection
: : I'm looking for info on ways to improve the wetting of polymer (more specifically explosiv plastic) in order to avoid false indications coming from air bubbles while scanning the part with ultrasound. Any reference or comment appreciated!
.
.
: First, I assume that the bubbles are clinging to the surface of the material rather than outgassing from it. Also, I assume that you are using de-aerated water (or water that has been standing for a day or so) to avoid outgassing from the water.
.
: I have no specific experience with scanning explosive plastics, but as a general suggestion, we sometimes use a very weak soap solution to break up surface tension when bubbles are clinging to the surface of a textured specimen. That minimizes the tendency of bubbles to cling to a surface. Just wet the surface of your test material with the solution before you put it in the test tank. Note that the concentration should be weak -- typically a couple drops of liquid soap in a liter of water is sufficient to break the surface tension.
.
: --Tom Nelligan
: Panametrics, Inc.
.

You may also want to consider the chemical effects of the liquid soap on the material you are testing, I'd hate to start a chain reaction considering the material you're on ;)




    
 
 

Product Spotlight

Research Center IDEKO develops an ultrasonic train wheel inspection system for CAF

The Basque Research centre IK4-IDEKO has developed a state-of-the-art ultrasonic inspection system f
...
or the train wheel. This system secures a sound condition of train wheels and is thus a significant contribution to rail transport safety. The device was delivered to CAF recently and its use allows the manufacturer to become an approved supplier of rolling stock in Italy, as it meets the demanding homologation standards of this country. \\\\r\\\\n
>

IntraPhase Athena Phased Array System

The Athena Phased Array system, manufactured by WesDyne NDE Products & Technology, consists of a pha
...
sed array acquisition system and PC running IntraSpect software. A PC is used to perform acquisition, analysis and storage of the data. System hardware is capable of operating up to four data sets with any combination of phased array or conventional UT probes. NOW AVAILABLE IN 64-64 CONFIGURATION.
>

AMIGO2

TSC Amigo2 - ACFM technology has developed a solid reputation for accurately detecting and sizing
...
surface-breaking cracks through paint and coatings. As the industry demands increased performance in speed, signal quality, and portability, it’s time for an evolution. It’s time for Amigo2.
>

ISONIC 3510

Very Powerful Superior Performance Extremely Portable Smart Phased Array Ultrasonic Flaw Detector an
...
d Recorder with 2 Conventional UT and TOFD Channels uniquely combines PA, single- and multi-channel conventional UT, and TOFD modalities providing 100% raw data recording and imaging. Suitable for all kinds of every-day ultrasonic inspections
>

Share...
We use technical and analytics cookies to ensure that we will give you the best experience of our website - More Info
Accept
top
this is debug window