Crevice corrosion: pitting pitting or pitting in a metal component. It is a form of localized corrosion. It may occur in the crevice or shielding surface of the solution. Such slits can be formed at the joints of metal and metal or metal and nonmetal, for example, in the form of candles with rivets, bolts, gaskets, seats, loose surface deposits, and marine organisms.
Total corrosion: a term used to describe corrosion phenomena in a relatively uniform manner on the entire alloy surface. When total corrosion occurs, the material will become thinner due to corrosion, and even the corrosion of the material will be invalid. Stainless steel may exhibit total corrosion in strong acids and alkalis.
301 stainless steel shows obvious work hardening during deformation and is used in various occasions requiring higher strength.
302 stainless steel is essentially a higher carbon content of 304 stainless steel varieties, through cold rolling can make it higher strength.
304 is a versatile stainless steel which is widely used in the manufacture of equipment and parts requiring good overall performance (corrosion resistance and formability).
304L is a variety of 304 stainless steel with low carbon content, used for occasions where welding is required. The lower carbon content minimizes the precipitation in the heat affected zone near the weld, while the precipitation of the carbide may lead to intergranular corrosion in some environments