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 -

951 views
Technical Discussions
Pablo Emilio Guzman
NDT Inspector,
Ingenieros Especialistas, Colombia, Joined Sep 2015, 5

Pablo Emilio Guzman

NDT Inspector,
Ingenieros Especialistas,
Colombia,
Joined Sep 2015
5
01:35 Nov-02-2015
MT bath contamination
zoom image

Current sample

zoom image



In our magnetic bench, the bath oil sample is showing a highly fluorescent color, more than normal. That is due to what?, until what level of fluorescent must consider before to replacement?. Thanks a lot for your comments.

 
 Reply 
 
Toma Alexandru
NDT Inspector,
NORD TEST SOFT, Romania, Joined May 2011, 13

Toma Alexandru

NDT Inspector,
NORD TEST SOFT,
Romania,
Joined May 2011
13
08:29 Nov-02-2015
Re: MT bath contamination
In Reply to Pablo Emilio Guzman at 01:35 Nov-02-2015 (Opening).

Naturally, fluorescence in the liquid vehicle can detract from the contrast of fluorescent indications. It can also signal the breakdown of fluorescent magnetic particles into their components. A fluorescent magnetic particle bath composed of unattached fluorescent pigment along with non-fluorescent particles, whose indications cannot be seen under ultraviolet radiation, is not usable and should be discarded.
Three different conditions can lead to fluorescence in the supernatant liquid after settling is complete, but not all of them indicate a substandard bath. Fluorescent oils or grease can be swept into the bath from test surfaces, making the whole liquid fluorescent. Particles can break apart, leaving tiny slow settling fragments of fluorescent but nonmagnetic pigment behind. Finally, some very small but complete particles can escape agglomeration and, settling at individually slow rates, may require another hour or more to finally settle out.

ISO 9934-2 7.6 Fluorescence of carrier liquid
The fluorescence of the carrier liquid shall be checked by visually comparing with quinine sulphate solution when irradiated with UV-A of at least 10 W/m²
The concentration of the quinine sulphate solution shall be 7 × 10-9 M (5,5 ppm) in 0,1 N H2SO4.
The carrier liquid under test shall exhibit no more fluorescence than the quinine sulphate solution.

 
 Reply 
 

Product Spotlight

Eddy Current inspection : RotoETscan Rotating Head

The rotating head RotoETscan detects the presence of longitudinal surface or sub surface defects a
...
t high speed. The rotating head is often installed directly on the production line. It is generally dedicated to the control of long products such as tubes, bars and wires, made of ferrous or non-ferrous material. It can also be used for inspection of small parts (billets).
>

AIS229 - Multipurpose Real Time System

Latest standard & automatic real time system developed by Balteau. The AIS229 has been designed to
...
do series inspection in a wide variety of industry. Composed of a shielded cabinet, 5 axis manipulator, x-ray generator and tubehead from 160kV to 225kV, a fl at panel & much more, the AIS229 is most certainly one of the most multipurpose RTR system available on the market.
>

Ultrasonic Squirter/Gantry System

TecScan’s NDT Ultrasonic Gantry Systems are industrial Squirter scanners designed for non-destru
...
ctive quality testing and raster scanning of large structures and parts. The Gantry Systems are usually composed of an Industrial Mechanical Scanner and a Control Room with System Workstation.
>

Customized Probes and Transducers

With a strong development department and our own piezocomposite production, we accompany you from th
...
e first product idea to serial production. Our scientists are continuously researching new methods in the field of ultrasonic measurement technology. The progress achieved enables us to offer you optimal solutions.
>

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