Why Does Stainless Steel Rust

- May 11, 2017 -

Why does rust rust? When the surface of stainless steel tubes appear brown spots (dots), people are surprised that it is not stainless steel, may be steel problems.

In fact, this is a lack of understanding of stainless steel a one-sided misconception.

Stainless steel will rust under certain conditions.

Stainless steel has the ability to resist corrosion in the medium containing acid, alkali and salt---that is, corrosion resistance. But its corrosion resistance is the size of the steel itself with its chemical composition, add to the state, use conditions and dry clean atmosphere, there is absolutely excellent corrosion resistance ability, but move it to the seaside area, in a large amount of salt in the sea fog, steel tubes are well behaved. Therefore, not any kind of stainless steel in any environment can corrode not rust.

Stainless steel is a very thin layer of the surface formed by the continuous infiltration, continued oxidation, and the ability to obtain corrosion resistance. Once there are some reasons,

The film is constantly destroyed, air or liquid will continue to infiltrate or metal in the iron atoms constantly out of the analysis, the formation of loose oxygen-breaking rust.

A kind of stainless steel can have good corrosion resistance in many mediums, but in some other medium, it may be corrosive due to low chemical stability.

Therefore, a stainless steel is unlikely to resist all the media.