Dear all, Thanks for your fast replies and valuable inputs. It looks like this question made a nice strike having Bev, Dave and Doug responding! I take the FT-IR suggestion and will check if it is applicable or relevant (the request was not directly for me...). Thanks again and long live to TechNet. Arnaud Grivon -----Message d'origine----- De : TechNet [mailto:[log in to unmask]] De la part de Bev Christian Envoyé : mardi 7 janvier 2020 16:02 À : [log in to unmask] Objet : Re: [TN] [External] Re: [TN] [COM] Evaluating/Monitoring Silicone Contamination Further, If the coupon/other surface to be examined is reflective there is no need to do an extraction process, you can get an excellent spectrum in reflection. Regards, Bev From: David Hillman <[log in to unmask]> Sent: Tuesday, January 7, 2020 9:54 AM To: TechNet E-Mail Forum <[log in to unmask]>; [log in to unmask] Subject: Re: [External] Re: [TN] [COM] Evaluating/Monitoring Silicone Contamination Hi team! I second Bev's recommendation. We have used FTIR successfully for audit questions. You can take a clean metal coupon, place it in a cure oven, run a cure cycle and then conduct an FTIR assessment to demonstrate that no silicone cross contamination is occurring in the process (i.e. the coupon shows no indications of silicone material). Dave Hillman Collins Aerospace [log in to unmask] <mailto:[log in to unmask]> On Tue, Jan 7, 2020 at 8:49 AM Bev Christian <[log in to unmask] <mailto:[log in to unmask]> > wrote: Arnaud, Not cheap, but FTIR is an excellent method for detecting silicones. Regards, Bev -----Original Message----- From: TechNet <[log in to unmask] <mailto:[log in to unmask]> > On Behalf Of GRIVON Arnaud Sent: Tuesday, January 7, 2020 9:00 AM To: [log in to unmask] <mailto:[log in to unmask]> Subject: [TN] [COM] Evaluating/Monitoring Silicone Contamination Happy New Year TechNet ! Here is a first query for 2020... We all know about the need of carefully segregate acrylic/urethane from silicone conformal coatings, but how about evidencing and demonstrating (say for an angry auditor) the actual lack of silicone cross-contamination on toolings, ovens and workspaces ? Are you aware of any reliable test system to perform silicone contamination evaluations? What are their principles and related test methods & acceptance criteria? It looks like some suppliers offer Surface Silicone Contamination Test Kits : - Henniker Plasma<https://urldefense.proofpoint.com/v2/url?u=https-3A__plasmatreatment.co.uk_wp-2Dcontent_uploads_2016_09_Henniker-2DPla <https://urldefense.proofpoint.com/v2/url?u=https-3A__plasmatreatment.co.uk_wp-2Dcontent_uploads_2016_09_Henniker-2DPla&d=DwICAg&c=ilBQI1lupc9Y65XwNblLtw&r=qMshjwqeixvQjs1qYTl8aRebuaqi25nLzYlpmDF6tjI&m=0FRlP4dx1xpQpOzzzwM6Lve6zyjkRpbCgOTxviaD3Zk&s=Ep6e_JqIAB-C3jV3KJPdKGDQ5I2Fc3a2zsBHanP85-0&e=> &d=DwICAg&c=ilBQI1lupc9Y65XwNblLtw&r=qMshjwqeixvQjs1qYTl8aRebuaqi25nLzYlpmDF6tjI&m=0FRlP4dx1xpQpOzzzwM6Lve6zyjkRpbCgOTxviaD3Zk&s=Ep6e_JqIAB-C3jV3KJPdKGDQ5I2Fc3a2zsBHanP85-0&e= sma-Technology-Overview.pdf> : https://urldefense.proofpoint.com/v2/url?u=https-3A__plasmatreatment.co.uk_henniker-2Dplasma-2Dtechnology_products_surface-2Dte <https://urldefense.proofpoint.com/v2/url?u=https-3A__plasmatreatment.co.uk_henniker-2Dplasma-2Dtechnology_products_surface-2Dte&d=DwICAg&c=ilBQI1lupc9Y65XwNblLtw&r=qMshjwqeixvQjs1qYTl8aRebuaqi25nLzYlpmDF6tjI&m=0FRlP4dx1xpQpOzzzwM6Lve6zyjkRpbCgOTxviaD3Zk&s=AB3yDQaPURrIweRZnP5pGgyVgrEDmkiS5qokssTFuP8&e=> &d=DwICAg&c=ilBQI1lupc9Y65XwNblLtw&r=qMshjwqeixvQjs1qYTl8aRebuaqi25nLzYlpmDF6tjI&m=0FRlP4dx1xpQpOzzzwM6Lve6zyjkRpbCgOTxviaD3Zk&s=AB3yDQaPURrIweRZnP5pGgyVgrEDmkiS5qokssTFuP8&e= st-equipment/test-for-surface-silicone-contamination/ - Anderson Materials Evaluation : https://urldefense.proofpoint.com/v2/url?u=http-3A__www.andersonmaterials.com_test-5Fmethods_testing-2Dfacilities-2Dfor-2Dsilicon <https://urldefense.proofpoint.com/v2/url?u=http-3A__www.andersonmaterials.com_test-5Fmethods_testing-2Dfacilities-2Dfor-2Dsilicon&d=DwICAg&c=ilBQI1lupc9Y65XwNblLtw&r=qMshjwqeixvQjs1qYTl8aRebuaqi25nLzYlpmDF6tjI&m=0FRlP4dx1xpQpOzzzwM6Lve6zyjkRpbCgOTxviaD3Zk&s=Zh_qyJmTEBherFBgLxWkxu6kfo-7GjsmgI8UlB50j9c&e=> &d=DwICAg&c=ilBQI1lupc9Y65XwNblLtw&r=qMshjwqeixvQjs1qYTl8aRebuaqi25nLzYlpmDF6tjI&m=0FRlP4dx1xpQpOzzzwM6Lve6zyjkRpbCgOTxviaD3Zk&s=Zh_qyJmTEBherFBgLxWkxu6kfo-7GjsmgI8UlB50j9c&e= e-contamination.html#<https://urldefense.proofpoint.com/v2/url?u=http-3A__www.andersonmaterials.com_test-5Fmethods_testing-2D <https://urldefense.proofpoint.com/v2/url?u=http-3A__www.andersonmaterials.com_test-5Fmethods_testing-2D&d=DwICAg&c=ilBQI1lupc9Y65XwNblLtw&r=qMshjwqeixvQjs1qYTl8aRebuaqi25nLzYlpmDF6tjI&m=0FRlP4dx1xpQpOzzzwM6Lve6zyjkRpbCgOTxviaD3Zk&s=Gt3ENH0EurLNosj337i8Yspnn4ckCubhDKFmlKaimZM&e=> &d=DwICAg&c=ilBQI1lupc9Y65XwNblLtw&r=qMshjwqeixvQjs1qYTl8aRebuaqi25nLzYlpmDF6tjI&m=0FRlP4dx1xpQpOzzzwM6Lve6zyjkRpbCgOTxviaD3Zk&s=Gt3ENH0EurLNosj337i8Yspnn4ckCubhDKFmlKaimZM&e= facilities-for-silicone-contamination.html> Any practice of such test kits and return of experience to share? Thanks in advance for your feedbacks. Best regards, Arnaud Grivon
