Stainless steel corrosion

Atmospheric corrosion of stainless steel is the process of destruction of stainless metal due to its interaction with air, water and other substances in the ground atmosphere. A feature of atmospheric corrosion is the possibility of free access of oxygen to the corroding surface. This is due to the small thickness of the oxide film and convection of electrolyte mixing.

Bimetallic - galvanic - contact corrosion can occur when two dissimilar metals are in "electrical" contact and are connected by a conductive liquid. The resulting "cell" can lead to corrosion of one of the paired metals. Depending on the circumstances, this can be a problem when stainless steel is in contact with other metals.

The chemical compatibility and resistance of stainless steel depends on the specific type, grade of steel and the environment with which it comes into contact. There are many different types of stainless steel, each with its own chemical composition and properties. The most common grades include AISI 304 and AISI 316.

The compatibility of stainless steel with other metals depends on the specific type/grade of stainless steel and the metal it comes into contact with. Stainless steel is compatible with some metals, but there are some that when combined (in contact) form a galvanic pair, which can lead to rust and subsequent corrosion (bimetallic | galvanic | contact) of your product.

Stray current corrosion of stainless steel (electrocorrosion) is a type of corrosion that occurs in the presence of stray current. Stray current is current that flows in paths other than those provided by the circuit. The uniqueness of stray current corrosion of stainless steel is that it can only occur at the discharge point.

Corten steel (COR-TEN steel, corten steel, corten, Corten Steel) - this is weather-resistant steel (under certain conditions) or "rusty" steel, which belongs to the group of alloy steels that have high resistance to atmospheric corrosion. This is the case when the rust itself on the surface of the metal prevents the spread of rust deep into the material and makes its further destruction impossible.

Fretting corrosion of stainless steel is corrosion that occurs during cyclic mutual movement of two contacting surfaces and the action of a corrosive environment. It occurs due to the continuous destruction of the oxide protective film at the points of moving contact.

Intergranular corrosion of stainless steel, unlike many other forms of stainless steel corrosion, occurs at the microscopic level, affecting the structure of the metal. Signs of damage do not always appear on the surface of the metal. The occurrence of intergranular corrosion requires certain circumstances, and in some cases the damage caused by it can be avoided.

The maximum temperature of stainless steel in air depends on the type of stainless steel and the operating conditions. In general, stainless steels can be used in air at temperatures up to 870 °C. However, some types / grades of stainless steel can withstand higher temperatures. For example, AISI 316 steel can be used up to 1000 °C, and AISI 446 steel up to 1200 °C.

Biological corrosion of stainless steel is a process during which stainless metals are destroyed by living organisms such as algae, bacteria, fungi and larger living creatures. Microbiological corrosion of stainless steel is a process of destruction of stainless metal caused by the activity of microorganisms.

Parking / anti-parking or sidewalk bollard (street bollard) made of stainless steel is a metal product made of stainless metal, related to the type of parking equipment. Purpose: for fencing territories, delimiting automobile / transport and pedestrian zones, serves to organize parking or prevents parking in prohibited areas. Can be used both outside and inside buildings and in underground parking lots to separate individual

The appearance of rust on stainless steel products baffles many people. If this material is called "stainless steel", then why can stainless steel oxidize, darken, blacken and rust? In fact, if the production technology is violated or the operating rules are violated, rust can appear even on high-quality stainless steel.