Ian, I am no expert in this field, but as far as I can determine, using http://www.matweb.com/index.asp?ckck=1, these materials seem to be ceramic in nature and have very high dielectric strength. On this basis, a conductive gasket will not work and by comparison with Alocrom 1200, the properties will be completely different (almost opposite).
If your objective here is to find an alternative to Alocrom 1200 for RoHS compliance purposes, you might like to consider SurTec 650. We have found that it compares very favourably. Look at http://www.surtec.com/!PIB/6%20Konversionsschichten/Englisch/650E.pdf. This is a Chrome 3 based passivation finish that seems to perform just as well as Alocrom 1200 from a corrosion protection perspective. Best regards Neil R. Barker CEng MIET FSEE MIEEE Manager Quality Engineering e2v technologies (uk) ltd 106 Waterhouse Lane Chelmsford Essex CM1 2QU UK Tel: (+44) 1245 453616 Fax: (+44) 1245 453571 Mob: (+44) 7801 723735 P Please consider the environment before printing this email. From: [email protected] [mailto:[email protected]] Sent: 03 April 2007 08:24 To: [email protected] Cc: [email protected] Subject: EMC and titanium/zirconia phosphate coatings Dear Group, Can any correspondents provide me with information on the electrical properties of titanium/zirconium phosphate as a surface finish on metal enclosures? I suspect it may be an insulator. Is this correct? Further, can I please have any comments you may have on the likely RF shielding performance of an enclosure coated with titanium/zirconium phosphate relative to one coated with Alochrome 1200? I particular, I am interested in knowing whether there is likely to be continuity of the shielding through a conducting gasket sandwiched between two titanium/zirconium phosphate coated metal surfaces. Many thanks in anticipation of your help. Ian Unwin Lead Engineer Servomex Group Limited Jarvis Brook Crowborough East Sussex TN6 3DU England Phone: +44 (0)1892 603328 Fax: +44 (0)1892 668954 email: [email protected] Sent by E2V TECHNOLOGIES PLC or a member of the E2V group of companies. A company registered in England and Wales. Company number: 04439718. Registered address: 106 Waterhouse Lane, Chelmsford, Essex, CM1 2QU, UK. - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Jim Bacher: [email protected] David Heald: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________
