How Apple Uses Rust to Make MacBooks and iPods Tough and Colorful

You probably own a ton of gadgets made from aluminium and titanium . Lot of ’em by Apple . But did you know that the smooth , brushed finish on the Earth’s surface of your MacBook or iPod is actually made with a thin grade of rusting ?

EngineerGuy Bill Hammackexplains that the finish is achieved by oxidizing — or rusting[Ed . bank bill : yes , rusting is the oxidisation of iron , specifically , but the common utilization is quite understood]—the aluminum on the surface , enough for dye to seep into the petite holes created by the procedure . The metal seems paint , but the color in reality becomes part of the aluminum . It ’s reasonably cool , and another room that Apple and other vivid - and - shiny makersget creative with engineeringwhen it come to contrive . [ YouTube ]

https://gizmodo.com/how-apples-supply-chain-dominance-let-it-shoot-lasers-t-5856402