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 -

TWI
TWI is a global leader in technology engineering providing research and consultancy to its members in the field of materials and selection, joining, inspection, NDT and structural integrity management.

858 views
Technical Discussions
Brian Younce
Brian Younce
05:13 Dec-20-2000
Mechanical Cleaning Prior To Magnetic Particle Inspection

NDT Folks,
I am wondering if anyone has information regarding mechanical cleaning prior to magnetic particle inspection. The specific application would be removing heat treat scale prior to magnetic particle inspection. One method that we are considering is a glass media blast. My concerns would be metal smearing or discontinuity contamination.
I would like to hear of any specific practices which some of you may use for this same type of application. Thank you in advance for any help.
Regards,
Brian


    
 
 
Dave Ronson
Dave Ronson
06:16 Dec-20-2000
Re: Mechanical Cleaning Prior To Magnetic Particle Inspection
: NDT Folks,
: I am wondering if anyone has information regarding mechanical cleaning prior to magnetic particle inspection. The specific application would be removing heat treat scale prior to magnetic particle inspection. One method that we are considering is a glass media blast. My concerns would be metal smearing or discontinuity contamination.
: I would like to hear of any specific practices which some of you may use for this same type of application. Thank you in advance for any help.
: Regards,
: Brian

I would suggest you try using a chemical such as Ardrox 185 used with Ardrox 188 a high alkaline type product which is made for steel components to remove heat scale. Unfortnatlry, you will have to heat both products to around 180 degrees F. It is not a feild application.




    
 
 
Tom Murphy
NDT Inspector
USA, Joined Jul 2000, 16

Tom Murphy

NDT Inspector
USA,
Joined Jul 2000
16
06:39 Dec-20-2000
Re: Mechanical Cleaning Prior To Magnetic Particle Inspection
We commonly use glass bead blasting. We perform MT
inspection of steam turbine components after a period
of service. They have heat scale after they have run
for awhile. Our procedure requires that the glass
shot should be of a high grade crown glass of the
soda lime type with silica content >62%. It also
recommends a spherical shape and bead diameters of
0.006 inches to 0.010 inches in diameter. The beads
are not to be reused.

Regards,
Tom

: NDT Folks,
: I am wondering if anyone has information regarding mechanical cleaning prior to magnetic particle inspection. The specific application would be removing heat treat scale prior to magnetic particle inspection. One method that we are considering is a glass media blast. My concerns would be metal smearing or discontinuity contamination.
: I would like to hear of any specific practices which some of you may use for this same type of application. Thank you in advance for any help.
: Regards,
: Brian




    
 
 
Barry J Gordon
Barry J Gordon
01:50 Dec-20-2000
Re: Mechanical Cleaning Prior To Magnetic Particle Inspection
: NDT Folks,
: I am wondering if anyone has information regarding mechanical cleaning prior to magnetic particle inspection. The specific application would be removing heat treat scale prior to magnetic particle inspection. One method that we are considering is a glass media blast. My concerns would be metal smearing or discontinuity contamination.
: I would like to hear of any specific practices which some of you may use for this same type of application. Thank you in advance for any help.
: Regards,
: Brian


Brian,

In circumstances where we don't want discontinuity contamination such as turbine blades we use bicarb soda blasting. It is very gentle on the parent material but will still remove a strong build up of scale and has the added advantage of being environmentally friendly.


    
 
 

Product Spotlight

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
>

NEW Wheel Type Phased Array Probe

DOPPLER NEW Wheel Type Phased Array Probe, more stable, new tyre makes lesser acoustic attenuation
...
, much lighter makes easier to handle, more slim size, magnetic and mechanical encoder optional etc...more
>

Immersion systems

ScanMaster ultrasonic immersion systems are designed for high throughput, multi shift operation in a
...
n industrial or lab environment. These fully integrated systems provide various scanning configurations and incorporate conventional and phased arrays technologies to support diverse applications, such as inspection of disks, bars, shafts, billets and plates. All of ScanMaster immersion systems are built from high accuracy scanning frames allowing for scanning of complex parts and include a multi-channel ultrasonic instrument with exceptional performance. The systems are approved by all major manufacturers for C-scan inspection of jet engine forged discs. Together with a comprehensive set of software modules these flexible series of systems provide the customer with the best price performance solutions.
>

X-ray CT aids research into defect formation in AM parts

X-ray CT is used to research how additive manufacturing process parameters influence defect format
...
ion in AM parts.
>

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
s