A connector subassembly for an automotive High Intensity Discharge (HID) lamp failed at 672 hour salt fog test. The connector backshell, made from either nickel plated or anodized A413.0 aluminum alloy, corroded heavily where a braided electromagnetic interference (EMI) shield was attached. Pitting corrosion enhanced by the presence of chloride ions and a galvanic cell is the cause. Five design concepts are evaluated and then ranked based on cost, assembly easy, schedule impact, and aesthetics. For the leading design, the nickel plated backshell remained, but a nickel plated braid and polymer clamp replaced the existing shield and clamp.
Corrosion of a high intensity discharge lamp
Die Korrosion an einer Hochintensitäts-Entladungslampe
SAE Technical Papers ; 1-17
1995
17 Seiten, 14 Bilder, 10 Tabellen
Aufsatz (Konferenz)
Englisch
Automobilindustrie , Fahrzeugelektrik , Kontrolleinrichtung , Lampe , Ladung (elektrisch) , Korrosionsprüfung , Salzsprühprüfung , Aluminiumlegierung , Nickel , elektromagnetische Welle , Interferenz , Pitting , Chlorverbindung , galvanisches Element , technische Beschreibung , Auslegung (Dimension) , Werkstoffeignung , Polymer , Kraftfahrzeugelektrik , Überwachung , Korrosion , Gebrauchseignung , Werkstoffwahl
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