What's the difference between galvanized steel and stainless steel?

Galvanized steel sheet is to prevent the corrosion of steel plate surface, and prolong its service life, the surface of the steel plate is coated with a layer of metal zinc, this kind of zinc coated steel sheet is called galvanized sheet.

Galvanized steel strip products are mainly used in construction, light industry, automobile, agriculture, animal husbandry, fishery and commercial industries. The construction industry is mainly used in the manufacture of anti-corrosive industrial and civil building roof panel and roof grate; for the manufacture of electrical appliance shell, light industry, civil chimney, kitchen appliances, automobile industry is mainly used in the manufacture of anti-corrosive parts of car; animal husbandry and fishery is mainly used as freezing processing tools for grain storage, meat and aquatic products the main business; used as a material storage, packaging etc..

Stainless steel refers to the air, steam, water and other weak corrosive medium and acid, alkali, salt and other chemical corrosive medium corrosion of steel, also known as stainless acid resistant steel. In practical application, the steel which is often corroded by weak corrosive medium is called stainless steel, and the steel which is resistant to chemical medium is called acid resisting steel.

Stainless steel is often divided into martensitic steel, ferritic steel, austenitic steel, austenitic ferrite (duplex) stainless steel and precipitation hardening stainless steel according to the state of the organization. In addition, can be divided into components: chromium stainless steel, chromium nickel stainless steel and chromium, manganese, nitrogen, stainless steel and so on.

The corrosion resistance of stainless steel decreases with the increase of carbon content. Therefore, the carbon content of most stainless steel is lower, the maximum is not more than 1.2%, and the Wc (carbon content) of some steel is even lower than 0.03% (such as 00Cr12). The main alloying element in stainless steel is Cr (chromium), which is corrosion resistant only when the Cr content reaches a certain value. Therefore, stainless steel in general Cr (chromium) content of at least 10.5%. Stainless steel also contains Ni, Ti, Mn, N, Nb, Mo, Si and other elements.

Stainless steel is difficult to produce corrosion, pitting, corrosion or wear.  Stainless steel is one of the highest strength materials used in construction.  Because stainless steel has good corrosion resistance, it enables structural components to permanently maintain the integrity of Engineering design. Chromium containing stainless steel is also a combination of mechanical strength and high extensibility, easy to process and meet the needs of architects and structural designers.