Don, The "yellow..." could mean a yellow chromate film(coating) on aluminum metal(for example) applied for corrosion protection. The advice not to used is because of the high impedance. The film EMC people use is clear because of the low impedance. For yellow, purple, etc there is good corrosion resistance whereas the clear coating is low corrosion resistance but also low Z). So we have the compromise between low Z and low corrosion resistance or high Z and high corrosion resistance. There are also porosity of the film with processing conditions.
This is my best guess with the information available. Be glad to help you on more specifics. Richard Haynes 609-497-4584 -----Original Message----- From: UMBDENSTOCK, DON <umbdenst...@sensormatic.com> To: 'EMC-PSTC Discussion Group' <emc-p...@ieee.org> List-Post: emc-pstc@listserv.ieee.org Date: Monday, November 30, 1998 6:06 PM Subject: Coatings that affect EMC performance >Hello Group, > >I remember recently (within the last quarter?) reading a thread about >different coatings, one of which everyone said "don't use". I have searched >through the RCIC "Recent Threads" and could not find a related subject. Can >anyone steer me to that thread? (something about "yellow ____"?) > >Regards, > >Don Umbdenstock >Sensormatic > >--------- >This message is coming from the emc-pstc discussion list. >To cancel your subscription, send mail to majord...@ieee.org >with the single line: "unsubscribe emc-pstc" (without the >quotes). For help, send mail to ed.pr...@cubic.com, >j...@gwmail.monarch.com, ri...@sdd.hp.com, or >roger.volgst...@compaq.com (the list administrators). > > --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, j...@gwmail.monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
