Main advantage of stainless steel is the resistance against the corrosion. In view of this feature, the alloys are used in different fields. Corrosion-resistant steels are able to be seen in the manufacturing household appliances and tools, medical equipment and tools, in car manufacturing and ship building, construction and other fields. For the first time, the steel was considered in 1913; and there has been great demand for stainless rolled metal products up to date.
Corrosion-resistant or stainless alloys are the metal products that are resistant against the influence of negative environmental factors. They are based on the iron the features of which are changed by means of the carbon. Alloy is able to be additionally enriched with valuable elements, for example, with chromium that increase the resistance against the moisture influence. Only 10,5% is enough for the improvement of some features:
By means of the chromium in the alloy, oxide coating is formed on the surface. Namely this coating prevents intercrystallite corrosion. Let us consider this process in details.
Corrosion: how to prevent the failure of metal
The iron is influenced by the environment. Moisture and aggressive environments facilitate the removing intercrystallite grid. Surface failures is called corrosion. In order to stop or avoid in common this process, the oxide coating is formed on external layer. However, there is no enough of this coating, that is why intercrystallite corrosion of stainless steels occurs very intensively.
Chemical influence of the environment is able to be stopped by means of the additives, which increase the resistance of the alloy. Application of special elements in the steel rapidly improves the features of the substance. Such alloys are influenced by the moisture in the air, aggressive acids, slats and alkalis fewer.
Details of the types of stainless steel
There are more than 250 stainless steel grades. Their main differences are the absence in the crystal grid of the elements determining main features. In addition to chromium, such additives as Ni, Mo, Co, Ti, No etc. are used. Difference in features and fields of use depends not only on the additive name, but on its percentage. In addition to iron and auxiliary elements, there is the carbon in stainless metals. It provides high strength and durability for finished metal.
Let us consider main types in details. All the types of stainless steel are able to be divided into several groups:
Acid-resistant stainless steel and other grades has excellent composition. Namely this feature determines technical and exploitation features of the metals. All of them are successfully used in modern industry. One of the main suppliers of high-quality alloys is "Orinnoks" company. It is the leader among the metal traders in the RF. You can order the product and get details about the metals on the website.