I'm a big fan of the work of Lex Pott. He's quite the chemist as well as a designer. I probably love it so much due to my own experimentation with metals during the final year of my degree (a few years ago now!)
During my final degree project I worked onto steel and copper, experimenting with printing onto and masking off areas before allowing them to rust and oxidise. This revealed hidden patterns and imagery which were inspired by the steel industry in Sheffield (my home town).