Stainless Steel Corrosion Types

Corrosion resistance of stainless steels contents 1.

Stainless steel corrosion types.

Different types of corrosion are explained in this article. In aqueous environments metals may be exposed to not only uniform corrosion but also to various types of local corrosion including pitting crevice intergranular stress and galvanic corrosion. Types of corrosion of stainless steels 4. Corrosion is a major problem especially in the construction industry where various metals are used for structural purposes.

For example grade 304 stainless steel when used in naval applications may start to suffer pitting as a result of contact with seawater which is rich in salt or salt enriched sea breezes. Most materials decayover time 2. Duplex grades are usually divided into three sub groups based on their corrosion resistance. These types of corrosion target a specific area in a metal s structure.

Lean duplex standard duplex and super duplex. Pitting corrosion is one of the most difficult types of corrosion to spot. In areas where corrosion is a concern stainless steel products offer value and protection against these threats. The most common types are.

In such aggressive environments stainless steel piping buried in soils should therefore be coated. It happens when a cavity is formed in the metal. Their mixed microstructure provides improved resistance to chloride stress corrosion cracking in comparison to austenitic stainless steel types 304 and 316. In principle stainless steels should be in the passive state in soils but the presence of water and aggressive chemical species such as chloride ions sulphates and as well as types of bacteria and stray current can cause localised corrosion.

The chloride ion cl is the most common of these and is found in everyday materials such as salt and bleach. The most common forms of corrosion in stainless steel are. Pitting crevice and filiform corrosion. Chloride ion is the most common of these and is found in everyday materials such as salt and bleach.

Pitting corrosion on stainless steel the passive layer on stainless steel can be attacked by certain chemical species. How to select the right stainless steel for adequate corrosion. Pitting corrosion the passive layer on stainless steel can be attacked by certain chemical species. Under localized corrosion we have three types.

Please be advised the descriptions below are extremely brief and written in laymen terms. Why does stainless steel resistcorrosion 3.