Good morning fellow Tec netters, first and foremost thank you all for sharing your comments, experience and information. I have two questions. 1) Is an ENIG finish RoHS compliant or is its compliancy based on the formula and / or process related? We are looking at converting all our board finishes to ENIG to comply with RoHS but in my research I can not locate any data that emphatically states this finish is compliant. Many organizations that offer RoHS alternatives list ENIG as an option. 2) I have been informed that passivation is RoHS compliant but have read different opinion's as far as compliancy? Any help would be greatly appreciated. Bruce Bryla -----Original Message----- From: Leadfree [mailto:[log in to unmask]] On Behalf Of Brian Ellis Sent: Thursday, September 21, 2006 2:56 AM To: [log in to unmask] Subject: Re: [LF] Galvanized RoHS Ah! But that is the American Galvanizers Association. What does the European Galvanisers Association (or whatever they call themselves) say? :-D Brian Tempea, Ioan wrote: > John and John, > > one of our suppliers sent this paper, to justify the lead we are > finding with the XRF machine. I will try to find where did they get it > from, in the mean time, the only thing I know is that it has been > written by the American Galvanizers Association. > > Regards, > > Ioan > > -----Original Message----- > From: Leadfree [mailto:[log in to unmask]]On Behalf Of John R. Sieber > Sent: Wednesday, September 20, 2006 1:09 PM > To: [log in to unmask] > Subject: Re: [LF] Galvanized RoHS > > > Ioan, > > Where can I find this paper on testing coated galvanized steel for > RoHS compliance? > > My understanding is that some steel applications use sheet metal with > two coatings on it. The first coating is a Zn or Zn-Al alloy applied > by either a galvanic or a hot-dip process. The second, outer coating > is the chromate process. [Can chromite process be substituted?] If > you obtain a depth profile of this multi-layer structure you see a > blurring of the interfaces between materials. At the surface, there > is carbonaceous matter. Underneath that is the Cr-bearing layer which > gradually incorporates Zn (and Al if present) as it morphs into the > galvanic or hot-dip coating. Deeper yet, the Zn or ZnAl layer > increases in Fe content as it transitions into the surface of the > steel. The extent of intermixing depends on whether there was an > annealing step included prior to the application of the Cr coating. > None of the layer boundaries are sharp and all contain other elements > either as contaminants or as alloy constituents. In addition, none of > the layers are uniform in thickness and composition across the entire > area of the sheet metal. > > This description is meant to impress on you that coatings are ugly > beasts that make terrible analytical specimens. Probably many of you > already know this. From the perspective of an analytical chemist, > there is nothing homogeneous about them. Depth profiles have been > obtained using glow-discharge atomic emission spectrometry, which does > not tell you the oxidation state of the Cr. One can probably study > the outer Cr-containing coatings using X-ray photoelectron > spectrometry and other microanalysis techniques. I'd be surprised if > very many coatings companies have these techniques available for > manufacturing QA. > > regards, > > John Sieber > > > At 12:34 PM 9/20/2006, you wrote: >> The galvanised coat is not homogeneous with the steel in respect of >> the RoHS definition of homogeneous. If it were then no one would be >> worrying about all the other plated finishes!! >> >> Regards, >> >> Chris >> >> >> -----Original Message----- >> From: Leadfree [mailto:[log in to unmask]] On Behalf Of Tempea, Ioan >> Sent: 20 September 2006 17:20 >> To: [log in to unmask] >> Subject: [LF] Galvanized RoHS >> >> Hi everybody, >> >> Steve has been kind enough to post a document I have sent to him. The >> paper practically says that galvanized steel is not considered a >> coated structure, therefore the homogeneous material take on >> galvanized steel considers the base material and coating to be one >> element. >> >> What do you think about this? >> >> Thanks, >> >> Ioan >> >> --------------------------------------------------------------------- >> --- >> -------Leadfee Mail List provided as a service by IPC using LISTSERV >> 1.8d >> To unsubscribe, send a message to [log in to unmask] with following text >> in >> the BODY (NOT the subject field): SIGNOFF Leadfree >> To temporarily stop/(start) delivery of Leadree for vacation breaks >> send: SET Leadfree NOMAIL/(MAIL) >> Search previous postings at: http://listserv.ipc.org/archives >> Please visit IPC web site >> http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional >> information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 >> ext.2815 >> ------------------------------------------------------------------------ >> ------- >> >> ----------------------------------------- >> This message (including any attachments) may contain confidential >> information intended for a specific individual and purpose. If you >> are not the intended recipient, delete this message. If you are not >> the intended recipient, disclosing, copying, distributing, or taking >> any action based on this message is strictly prohibited. >> >> >> --------------------------------------------------------------------- >> ----------Leadfee >> Mail List provided as a service by IPC using LISTSERV 1.8d >> To unsubscribe, send a message to [log in to unmask] with following text in >> the BODY (NOT the subject field): SIGNOFF Leadfree >> To temporarily stop/(start) delivery of Leadree for vacation breaks >> send: SET Leadfree NOMAIL/(MAIL) >> Search previous postings at: http://listserv.ipc.org/archives >> Please visit IPC web site >> http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional >> information, or contact Keach Sasamori at [log in to unmask] or >> 847-615-7100 ext.2815 >> ---------------------------------------------------------------------------- --- > > John R. Sieber, PhD > Research Chemist > > National Institute of Standards and Technology > Chemical Science and Technology Laboratory > Analytical Chemistry Division > 100 Bureau Drive, Stop 8391 > Gaithersburg, MD 20899-8391 USA > > [log in to unmask] > Tel: 1.301.975.3920 > Fax: 1.301.869.0413 > www.cstl.nist.gov/ > > Identification of commercial items in this document does > not imply endorsement by NIST or that items are > > ---------------------------------------------------------------------- > ---------Leadfee Mail List provided as a service by IPC using LISTSERV > 1.8d To unsubscribe, send a message to [log in to unmask] with following > text in the BODY (NOT the subject field): SIGNOFF Leadfree To > temporarily stop/(start) delivery of Leadree for vacation breaks send: > SET Leadfree NOMAIL/(MAIL) Search previous postings at: > http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 > ---------------------------------------------------------------------------- --- > necessarily the best for the purpose stated. > > ---------------------------------------------------------------------- > ---------Leadfee Mail List provided as a service by IPC using LISTSERV > 1.8d To unsubscribe, send a message to [log in to unmask] with following > text in the BODY (NOT the subject field): SIGNOFF Leadfree To > temporarily stop/(start) delivery of Leadree for vacation breaks send: > SET Leadfree NOMAIL/(MAIL) Search previous postings at: > http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 > ---------------------------------------------------------------------------- --- > -- http://www.cypenv.org Cyprus environment/energy http://www.cypenv.org/worldenv World environment/energy http://www.cypenv.org/weather Cyprus weather http://www.cypenv.org/smf/index.php Environment/energy forums http://groups.yahoo.com/group/cypnature/ Cyprus nature forum ---------------------------------------------------------------------------- ---Leadfee Mail List provided as a service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Leadfree To temporarily stop/(start) delivery of Leadree for vacation breaks send: SET Leadfree NOMAIL/(MAIL) Search previous postings at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ---------------------------------------------------------------------------- --- This e-mail and subsequent attachments may contain information which is proprietary to L-3 Communications Corporation. 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