industrial archaeology 
noun [mass noun]
The study of equipment and buildings formerly used in industry.The industrial archaeology of Tennessee caves is limited to a few studies of saltpeter mining and moonshine production sites....
- If you commissioned an industrial historian or someone from the field of industrial archeology, he would see things quite differently.
- It was then that he began to take an interest in industrial archeology and assembled an extensive collection of paintings such as this prizewinner.