Neil, Thanks for the information. It's alerted me to something I need to look at more closely. I do dislike directives and standards that need "interpreting".
Regards Dave > David, > There is a great deal of mixed information and opinion on Chrome 6 > conversion coatings, and many people seem to agree that they are not > compliant. I think the real issue here is a result of the interpretation of > the words 'mechanically separable' in the RoHS Directive. Many seem to > consider that abrasion is a form of mechanical separation that could remove > as little as the surface layer alone. The Trimite advice is based on it not > being mechanically separable from the base material, and hence not being a > significant proprotion of the total mass. The answer depends on your > interpretation. > We have our own chemical and metallurgical laboratory and some very > experienced people who work in it, and have conducted our own analysis on > treated parts and concur that it is in fact non-compliant. As a result of > this, we are not relying on the Trimite document. It seems reasonable that > if the consensus was that it is compliant, then there would not be > applications in place for exemptions, nor would there be a great deal of > work going on researching Cr6-free alternatives. > 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. > -----Original Message----- > From: David Want [mailto:[email protected]] > Sent: 04 April 2007 12:57 > To: Barker, Neil > Cc: [email protected] > Subject: Alochrom 1200 and RoHS > All, >> 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. - 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 ______________________________________________________________________
