Iron Man

Iron Man is a superhero appearing in American comic books published by Marvel Comics.

The character made his first appearance in the comic Tales of Suspense #39 (March 1963), and received his own title in Iron Man #1 in May 1968.

A wealthy American businessman Tony Stark suffers a severe chest injury during a kidnapping. When his captors attempt to force him to build a weapon of mass destruction, he instead creates a mechanized suit of armor to save his life and escape captivity.

In the Marvel Cinematic Universe, the character was portrayed by Robert Downey Jr., appearing in the films Iron Man (2008), The Incredible Hulk (2008), Iron Man 2 (2010), The Avengers (2012), Iron Man 3 (2013), Avengers: Age of Ultron (2015), Captain America: Civil War (2016), Spider-Man: Homecoming (2017), Avengers: Infinity War (2018) and Avengers: Endgame (2019). The character also appeared in Spider-Man: Far From Home (2019).

Palladium is the 46th element in the periodic table. It is a shiny, silvery-white metal that does not get rusty.

Most palladium is used in catalytic converters for cars. It is also used in jewellery and some dental fillings and crowns. 

In the Iron Man films, Tony Stark uses palladium to power the arc reactor in his chest that keeps him alive. He soon discovers that it is poisoning him and he needs to create a new element to use instead.