corrosion protection of electrically conductive surfaces导电表面的腐蚀保护.pdfVIP

Metals 2012, 2, 450-477; doi:10.3390/met2040450 OPEN ACCESS metals ISSN 2075-4701 /journal/metals/ Artic le Corrosion Protection of Electrically Conductive Surfaces Jian Song *, Liangliang Wang, Andre Zibart, Christian Koch Precision Engineering Laboratory, Ostwestfalen-Lippe University of Applied Sciences, Liebigstrasse 87, 32657 Lemgo, Germany; E-Mails: liangliang.wang@hs-owl.de (L.W.); andre.zibart@hs-owl.de (A.Z.); christian.koch@hs-owl.de (C.K.) * Author to whom correspondence should be addressed; E-Mail: jian.song@hs -owl.de; Tel.: +49-177-2131820; Fax: +49-5261-702263. Received: 19 June 2012; in revised form: 10 September 2012 / Accepted: 1 November 2012 / Published: 15 November 2012 Abstract: The basic function of the electrically conductive surface of electrical contacts is electrical conduction. The electrical conductivity of contact materials can be largely reduced by corrosion and in order to avoid corrosion, protective coatings must be used. Another phenomenon that leads to increasing contact resistance is fretting corrosion. Fretting corrosion is the degradation mechanism of surface material, which causes increasing contact resistance. Fretting corrosion occurs when there is a relative movement between electrical contacts with surfaces of ignoble metal. Avoiding fretting corrosion is therefore extremely challenging in electronic devices with pluggable electrical connections. Gold is one of