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Advantages Of Stainless Steel
Nov 23, 2017

The resistance of air, steam, water and other corrosive medium and weak acid, alkali, salt and other chemical etching medium corrosion of steel. Also called stainless steel. In practical application, often weak corrosion resistant steel known as stainless steel, the corrosion of steel called acid steel. Because of the difference both in chemical composition, the former does not necessarily medium chemical corrosion resistance, while the latter generally has not rust. Alloy elements of stainless steel corrosion resistance depends on the content of chrome is made of stainless steel. The basic elements of corrosion resistance, when the Cr content in steel reaches about 12%, chromium and oxygen. In the corrosion medium, to form a thin film on the surface of steel (self passivation film), the matrix can prevent further corrosion of the steel. In addition to chromium common alloying elements are nickel, molybdenum, titanium, niobium, copper, nitrogen, etc., to meet the requirements of various uses and properties of stainless steel stainless steel. Usually in the matrix organization is divided into: ferritic stainless steel containing 12% ~ 30%.. The corrosion resistance, toughness and weldability increased with chromium increases the amount of resistance to chloride stress corrosion better than other types of stainless steel. The austenitic stainless steel. More than 18% chromium, 8% also contains small amounts of nickel and molybdenum, titanium, nitrogen and other elements. The comprehensive performance is good, can withstand a variety of corrosive medium. The AUSTENITIC FERRITIC duplex stainless steel. With the advantages of austenite and ferrite stainless steel, and the Superplasticity of martensitic stainless steel. 4. But high strength, ductility and weldability is poor.