This chapter focuses on the applications of stainless steels in chemical and process industry, covering what data are necessary and how they can be found. It begins with an overview of single- and dual-environment systems and the corrosion issues they face. This is followed by a discussion on the causes of the various forms of corrosion associated with liquids, namely pitting corrosion, crevice corrosion, intergranular corrosion, stress corrosion cracking, and erosion corrosion. The chapter also contains tables listing corrosion rates of sulfuric acid and fuming sulfuric acid. It ends with a section providing information on specific environments against which stainless steels are resistant to select for use in the chemical process industries.