Chrome-plating

In my General Chemistry II and my Engineering Chemistry courses, I compare the corrosion behavior of iron and chromium, and mention how the very thin layer of oxide that rapidly forms on a layer of chromium metal helps prevent further corrosion of the chromium layer and the iron that typically supports that chromium layer.  This old car that I saw today, with its rusty iron body and its shiny chrome highlights, might be an illustration of these ideas.