Definition - What does Copper Sulfate mean?
Copper sulfate is an inorganic compound composed of sulfur and copper with the chemical formula CuSO4. It typically occurs as a gray-white or blue crystalline copper salt and has poisonous properties that can kill bacteria, algae and plants.
Corrosionpedia explains Copper Sulfate
Copper sulfate is a key chemical ingredient used to perform corrosion tests and confirmations on surfaces that have been previously treated to ensure preventative accuracy and sustenance. One such test is an inter-granular corrosion test designed to ensure a corrosion-free surface for stainless steels. A stainless steel sample is boiled in a copper sulfate solution for twenty four (24) hours, after which it is examined for inter-granular irregularities.