Englishmaninwales Posted December 11, 2005 Share Posted December 11, 2005 Anybody know of a crack testing firm in N Wales, Wirral, Cheshire area? (Metal crack testing as opposed to white powder testing 😬) Malcolm Link to comment Share on other sites More sharing options...
Pooh_R Posted December 12, 2005 Share Posted December 12, 2005 We use quality assurance in Ellesmere port for various ndt projects. I don't know if they do exactly what you want though. 0151 357 1491   Pooh A Bear of little Brain! Link to comment Share on other sites More sharing options...
Englishmaninwales Posted December 12, 2005 Author Share Posted December 12, 2005 *arrowup* Link to comment Share on other sites More sharing options...
Mr Locust Posted December 12, 2005 Share Posted December 12, 2005 What are you trying to test Malcolm? Ian Green and Silver Roadsport 😬 Link to comment Share on other sites More sharing options...
Englishmaninwales Posted December 12, 2005 Author Share Posted December 12, 2005 Ian My de dion tube and ears. (the latter after seeing Dannyboy's broken dedion ear at Oulton). No visible cracks, but I wanted to make sure! Malcolm Link to comment Share on other sites More sharing options...
Tony C Posted December 13, 2005 Share Posted December 13, 2005 Unless you can get it X-Ray'd, you'll probably need to have ALL the powdercoat removed before testing. Penetrant Dye will be OK (I suppose that's what you meant by white powder). There is a similar process using a machine to magnetize it and then a liquid containing magnetic particals is washed over it. BRG Brooklands SV 😬 It seems that perfection is achieved not when there is nothing more to add, but when there is nothing more to take away. (Antoine de Saint-Exupery) Link to comment Share on other sites More sharing options...
Englishmaninwales Posted December 13, 2005 Author Share Posted December 13, 2005 Powdercoat fell off ages ago, now only painted. In my ignorance I thought NDT was X-ray testing....Thanks for the replies Malcolm Link to comment Share on other sites More sharing options...
Adrian Bruce Posted December 13, 2005 Share Posted December 13, 2005 Magnetic Particle Testing is what you are referring to. You will need to shot blast the paint off back to bare metal around the welds for the best results. A permanent magnet (50lb pull) is good enough to give you a field prior to spraying the ink onto the test area. Link to comment Share on other sites More sharing options...
Mr Locust Posted December 13, 2005 Share Posted December 13, 2005 Mag particle would be suitable for the steel component only. Dye penetrant could be used for steel and aluminium. Both would require significant preparation to a good finish such as sand blast or abrasive cleaning with scotchbrite mops etc. If there was an area of particular concern and you can get good access by using a pit, you may be able to carry out a loacalised inspection without removing the tube eg around damper bushes. To be honest Malcolm, if it is concerning you enough to dismantle the car for inspection, it may be better to view the axle tube components as a 'lifed' items and renew them for your own peace of mind. Ian Green and Silver Roadsport 😬 Link to comment Share on other sites More sharing options...
thinfourth Posted December 13, 2005 Share Posted December 13, 2005 If it is out and sat on the deck and you want peace of mind buy a new one The happy handle made me do it Link to comment Share on other sites More sharing options...
Englishmaninwales Posted December 13, 2005 Author Share Posted December 13, 2005 Thanks for the replies. Ian/ Thinforth: All the rear suspension and dedion tube are on the workbench to have all bushes renewed (and diff also out to fit an LSD). Although there are no obvious signs of cracks ( it is the earlier through tube fixing for the damper which I gather lasts longer than the later type), I was interested in the feasibility/cost effectiveness in crack testing. As you say, maybe treating the tube as a 'lifed' item (now 45k miles) and simply replacing the item is simpler!! Malcolm Link to comment Share on other sites More sharing options...
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