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 -

Hillger Ing. Büro
was founded in 1984 and develops special ultrasonic imaging systems for high-tech materials.
964 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


    
 
 Reply 
 
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.




    
 
 Reply 
 
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




    
 
 Reply 
 
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.


    
 
 Reply 
 

Product Spotlight

IRIS 9000Plus - Introducing the next generation of heat exchanger inspection.

Representing the seventh generation of the IRIS system, the IRIS 9000 Plus has nearly 200 years of c
...
ombined field inspection experience incorporated in its design. This experience combined with a strong commitment to quality and a history of innovation has made Iris Inspection Services® the undisputed leader in IRIS technology.
>

Varex Imaging Large Field of View (FOV) Digital Detector Arrays (DDAs)

A larger FOV DDA can reduce the space and volume of the X-ray inspection system on the factory floor
...
, enable faster scanning times, better throughput and better resolution images at a lower dose. Customers can also save time and money. With these benefits in mind, Varex Imaging has designed a family of large FOV detectors (4343HE, XRD 1611, 4343DX-I, 4343CT) for our industrial imaging customers.
>

HD-CR 35 NDT Computed Radiography System

Portable high-resolution CR scanner for all radiography applications - weld testing, profile images
...
and aerospace. No matter what type of radiographic testing you are performing, the unique TreFoc Technology of the HD-CR 35 NDT imaging plate scanner always guarantees the highest image quality.
>

GEKKO - Portable Phased Array Testing with TFM in Real-Time

The portable phased array testing system GEKKO provides 64 parallel test channels. On creating testi
...
ng parameters the operator is assisted by the CIVA software. Due to its modular set-up the GEKKO instrument is suitable for operators of all skill levels.
>

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