Collecting a few links on fretting corrosion:

  • The tin commandments
  • Silver-silver vs. tin silver electrical connectors for high current and high vibration applications, ISTFA 2005 conference report
  • Dependence on force. p154-74.pdf: 1974 reference studies effect of contact force.
  • Korean papers:
    • tin.pdf: "Evaluation of surface characteristics under fretting of electrical contacts:Removal behaviour of hot dipped tin coating", 2008.
    • tin4.pdf: "Fretting corrosion characteristics of electrodeposited and hot dipped tin coating contacts", 2007.
    • tin2.pdf: "Effect of fretting amplitude and frequency on the fretting corrosion behaviour of tin plated contacts", 2006,
    • tin3.pdf: "Studies of tin coated brass contacts in fretting conditions under different normal loads and frequencies", 2007 .

  • Cris slides at the CMS Electronic week.

  • The lubricant, santovac-OS-138 we want to use is based in polyphenyl ether, which is supposed to have very good radiation resistant properties, be harmless and not flammable.

  • Symptoms: Increase contact resistance resulting in larger voltage contact drop and temperature increase (sometimes even leading to connector meltdown)
  • We have two main pieces of information that indicates we face fretting corrosion in our LV PS connectors (Ag-plated pin on tin-plated surface)
    • Temperature increase ALWAYS (stats > 10) observed on one polarity: tin-plated end at higher voltage that Ag-plated pin.
    • Observation of small amounts of debris on the connector

  • It has been also observed also in HCAL PS (same connectors).

-- IgnacioRedondo - 27-Aug-2010

Topic attachments
I Attachment History Action Size Date Who Comment
PDFpdf p154-74.pdf r1 manage 891.4 K 2010-06-06 - 23:51 IgnacioRedondo  
PDFpdf tin.pdf r1 manage 2665.8 K 2010-06-06 - 23:35 IgnacioRedondo  
PDFpdf tin2.pdf r1 manage 2300.8 K 2010-06-06 - 23:37 IgnacioRedondo  
PDFpdf tin3.pdf r1 manage 4411.8 K 2010-06-06 - 23:43 IgnacioRedondo  
PDFpdf tin4.pdf r1 manage 3823.9 K 2010-06-06 - 23:46 IgnacioRedondo  
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