抄録
The martensitic structure of steel of chromium less than about 16%Cr; carbon less than about 0.1∼0.2% is (A) group, which may contain small percentages of nikel, silicon, molybdenum. The corrosion resistance is very satisfactory in high chromium ranges for resisting weather,water,steam and many organic and inorganic corrodents.
The ferritic and martensitic structure of steel of chromium more than about 16% is(B) group; carbon quite low can increase as chromium goes up and corrosion passes resisting properties superior to (A) group and is especially good for nitric and other oxidizing acids.
The austenitic structure of steel of chromium and nickel is (C) group,which contain enough to make steel for austenitic and non-magnetic structure, and usually contain twice as much chromium as nickel or viceversa; total alloy contain at least 26%, carbon quite low and the steel may contain small percentages of copper, silicon, molybdenum.
Corrosion resistance depends largely upon total alloy content.
This (C) group wall resist nearly all corrodents measurably better than group (A) and (B) and the steel is especially good for organic acids.
The research on these stainless steels for several industries such as the paper manufacture, textile, pulp and dye used for the woven goods and bleaching adjustment will be used by means of heated or cold dilute sulphuric acid, and such as shose hot treated acetic acid, concentrated formic, oxalic or tartaric acids and other organic acids at some temperatures.
