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Technical Discussions
FRANKIE YAWN
Engineering
innovative technologies corp, USA, Joined Nov 2002, 6

FRANKIE YAWN

Engineering
innovative technologies corp,
USA,
Joined Nov 2002
6
01:03 Oct-15-2003
AIRCRAFT CORROSION INSPECTION

Are there methods and techniques developed to allow determination of the corrosion in the depth of the aircraft structure without removing the different layers of material to visual inspect each metallic surface?


    
 
 Reply 
 
Salim BENMEDAKHENE
Salim BENMEDAKHENE
03:23 Oct-16-2003
Re: AIRCRAFT CORROSION INSPECTION

Dear,
I think that the acoustic emission method could meet your need. If corrosion is active, it is possible to detect and locate it by carrying out an acoustic listening over one definite testing period.
For more information do not hesitate to consult our Internet site."www.aetech.fr"
Sorry, the English version of the site is planned for the next month.

Best Regards


----------- Start Original Message -----------
: Are there methods and techniques developed to allow determination of the corrosion in the depth of the aircraft structure without removing the different layers of material to visual inspect each metallic surface?
------------ End Original Message ------------




    
 
 Reply 
 
John Hansen
Director, - Eddy Current Technology
ETher NDE Ltd, United Kingdom, Joined Oct 1999, 73

John Hansen

Director, - Eddy Current Technology
ETher NDE Ltd,
United Kingdom,
Joined Oct 1999
73
08:21 Oct-16-2003
Re: AIRCRAFT CORROSION INSPECTION
Frankie

Eddy Current is the widely accepted and specified method for corrosion assesment in non-ferrous material with single side access.

If you have two side acces then radiography is a possibility also.

Please contact me directly for further information.

Regards

John Hansen
www.hocking.com


    
 
 Reply 
 
S.V.Swamy
Engineering, - Material Testing Inspection & Quality Control
Retired from Nuclear Fuel Complex , India, Joined Feb 2001, 787

S.V.Swamy

Engineering, - Material Testing Inspection & Quality Control
Retired from Nuclear Fuel Complex ,
India,
Joined Feb 2001
787
07:07 Oct-17-2003
Re: AIRCRAFT CORROSION INSPECTION
Hi,

Just to put the method in its correct perspective, AE will work only when the discontinuity is unstable, i.e. growing. All corrosion may not result in formation of such discontinuities. There are special purpose ultrasonic testing techniques to give you a A-scan view of several layers, if they are in acoustic contact with each other. As already mentioned by others, Eddy Current Testing and Radiography too could help.

One novel (I am not sure whether it is really novel) method could be to conduct a periodic Infra-Red Thermography Test on the structure. There is especially one technique called Flash Thermography which I feel is the best approach. I hope some one on the forum will give you more information, or you could check out the sites giving more information on IRT.

Vibration Analysis too could in theory give you a lot of information.

Best wishes.

Swamy

----------- Start Original Message -----------
: Dear,
: I think that the acoustic emission method could meet your need. If corrosion is active, it is possible to detect and locate it by carrying out an acoustic listening over one definite testing period.
: For more information do not hesitate to consult our Internet site."www.aetech.fr"
: Sorry, the English version of the site is planned for the next month.
: Best Regards
:
: : Are there methods and techniques developed to allow determination of the corrosion in the depth of the aircraft structure without removing the different layers of material to visual inspect each metallic surface?
------------ End Original Message ------------




    
 
 Reply 
 
John O'Brien
Consultant, -
Chevron ETC , USA, Joined Jan 2000, 278

John O'Brien

Consultant, -
Chevron ETC ,
USA,
Joined Jan 2000
278
09:56 Oct-17-2003
Re: AIRCRAFT CORROSION INSPECTION

As with most inspection problems the technique applicable will be controlled by the issues of detection, sizing and access ultimately tempered by cost.

Corrosion detection in ageing aircarft has been successfully measured using UT, ET and Thermal Wave Imaging (Flash IRT) and AE all as discussed by other respondents.

An Internet search should reveal information on all of the referenced techniques. In order to sleect which is best suited to your application you need to consider the morphology of the corrosion, its position within the structure and then the ability of the various techniques to penetrate and respond within the geometic configuration you are posing.


    
 
 Reply 
 
John Rodgers
John Rodgers
02:43 Oct-18-2003
Re: AIRCRAFT CORROSION INSPECTION
----------- Start Original Message -----------
: Are there methods and techniques developed to allow determination of the corrosion in the depth of the aircraft structure without removing the different layers of material to visual inspect each metallic surface?
------------ End Original Message ------------

We developed methods using acoustic emission to locate and map corrosion in honeycomb panels in 1974 for the US Air Force. This technique was in use for many years at the USAF depot in Sacramento, CA. Today we have a nice portable AE instrument, the AED-2000, that would be appropriate for use on aircraft in the field or depot maintenance. I would be happy to provide more details on the practice of the technique.


    
 
 Reply 
 
Mic
Consultant
AGM Techno consultants, India, Joined Jan 2003, 22

Mic

Consultant
AGM Techno consultants,
India,
Joined Jan 2003
22
03:08 Oct-22-2003
Re: AIRCRAFT CORROSION INSPECTION
Pl contact R/D tech Canada for satisfied solutions
Mic
----------- Start Original Message -----------
: : Are there methods and techniques developed to allow determination of the corrosion in the depth of the aircraft structure without removing the different layers of material to visual inspect each metallic surface?
: We developed methods using acoustic emission to locate and map corrosion in honeycomb panels in 1974 for the US Air Force. This technique was in use for many years at the USAF depot in Sacramento, CA. Today we have a nice portable AE instrument, the AED-2000, that would be appropriate for use on aircraft in the field or depot maintenance. I would be happy to provide more details on the practice of the technique.
------------ End Original Message ------------




    
 
 Reply 
 
Randy Plis
Sales, Consultant
AMDATA NDE Technology LLC, USA, Joined Oct 1999, 23

Randy Plis

Sales, Consultant
AMDATA NDE Technology LLC,
USA,
Joined Oct 1999
23
08:41 Oct-22-2003
Re: AIRCRAFT CORROSION INSPECTION
With regard to the topic of aircraft corrosion, Eddy Current testing (ET) is an applicable method that is further enhanced when using an ET C-Scan imaging. As there are numerous geometry related signals that must otherwise be sorted out via technique optimization and/or inspector experience, providing an easily understood image is of great value.

For further details, please download an application sheet entitled "Eddy Current Imaging of Hidden Corrosion on Aircraft" from the Literature section of our home page. Its link that can be found via our NDT.net Exhibit Stand.



    
 
 Reply 
 
Spartak Demchishin
Spartak Demchishin
09:57 Oct-31-2003
Re: AIRCRAFT CORROSION INSPECTION
Eddy Current is a good method for corrosion inspection in non-ferrous material with single side access. Our instrument DAMI-C provides corrosion detection in aluminum alloys with thickness up to 5mm with possibility of building scanned images of corroded zone.

Welcome to our site www.votum.md for further unfomation.

Regards
Spartak Demchishin





    
 
 Reply 
 
Wolfgang Bisle
Wolfgang Bisle
09:40 Nov-11-2003
Re: AIRCRAFT CORROSION INSPECTION
If you want to know really the state of the art, look at the ATA presentations about this technique.
search for aircraft manufacturers presentations and skip the presentations of Institutes (they have no real expereince and tell you mostly phantasy) and skip equipment manufacturers presentations up to that time you know what airlines do and aircraft manufacturers recommend: Equipment sellers advertise! So they can everything if you ask them. But they have no resposibility on aircraft safety in contrast to aircraft manufacturers and airlines.



    
 
 Reply 
 
golla ajai
golla ajai
04:52 Jun-14-2005
Re: AIRCRAFT CORROSION INSPECTION
----------- Start Original Message -----------
: If you want to know really the state of the art, look at the ATA presentations about this technique.
: search for aircraft manufacturers presentations and skip the presentations of Institutes (they have no real expereince and tell you mostly phantasy) and skip equipment manufacturers presentations up to that time you know what airlines do and aircraft manufacturers recommend: Equipment sellers advertise! So they can everything if you ask them. But they have no resposibility on aircraft safety in contrast to aircraft manufacturers and airlines.
:
------------ End Original Message ------------




    
 
 Reply 
 
golla ajai
golla ajai
04:53 Jun-14-2005
Re: AIRCRAFT CORROSION INSPECTION
i would like to know about aircraft corrossion, rasons and treatment available



    
 
 Reply 
 

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