About Stainless Steel

"Rust" its essence is corrosion or called rust, is due to the surface of steel and oxygen in the atmosphere, water and its acid, alkali, salt and other substances chemical or electrochemical action caused by the discoloration or corrosion known as rust. The material produced on the surface is rust, an oxide of iron.

Why stainless steel is not easy to rust, and in the matrix to add more than 12.5% chromium. Chromium can quickly form a dense passivation film on the surface of steel in oxidizing corruptible medium, preventing the metal matrix from being destroyed. When the chromium content in more than 12.5%, the formation of a layer of dense and stable passivation film, rust performance of the leap forward consolidation, corrosion resistance is greatly enhanced, this is why the chromium content in stainless steel to have more than 12% of the reason.

Stainless steel as the name implies is stainless steel, here "stainless" is relative, not absolute is relative to carbon steel. Stainless steel is not easy to rust, but not absolutely not rust, but in the same conditions and environment, than carbon steel is not easy to be corroded and rust.

Stainless steel in the addition of chromium at the same time, add appropriate amount of Ni, Mo, V and other alloy elements, rust performance is stronger. Therefore, in rust resistance, austenitic stainless steel is stronger than Martensite stainless steel. Secondly, the corrosion resistance of stainless steel is also related to the amount of carbon, chromium and surface treatment. Stainless steel with the increase of carbon content, rust performance decreased, 3Cr13 rust performance is less than 2Cr13. With the increase of steel content, rust resistance increases. Surface treatment method and condition affect rust resistance simultaneously. The anti-rust performance of chrome plating, electrolytic polishing, mirror polishing, sand belt and manual polishing decreases successively.

To do a good job of stainless steel knife shear rust, mainly lies in the destruction of stainless steel knife shear surface layer of passivation film. Wash as soon as possible after use. Dry. Try not to touch acid, alkali and salt.

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