![]() As the chromium contained reaches 12%, the stainless steel reacted with the atmosphere will produce a passivation film (Cr2O3) on the surface, a dense chromium-rich oxide that effectively protects the stainless steel surface from further oxidation. The “stainless” property is related to the chromium contained within the steel. Stainless steel, in contrast is corrosion resistant. Ordinary carbon steel reacts with oxygen of the atmosphere to form an oxide film on the metal surface and keeps oxidizing, which results in expanded rust, forming a "thousand-layer Cake" type of corrosion until the rotten wear. Why Stainless Steel is Corrosion Resistance? On the contrary, if the compounds are unstable, volatile or dissolved, not bonding with the metal strongly, the corrosion products will be peeling off layer by layer, like the oxide, hence unable to protect the metal matrix from further corrosion. This behavior is known as "passivation effect." If the compounds produced by the chemical corrosion are stable, not easy to evaporate and dissolve, of dense tissue and binding strongly with metal matrix, the corrosion products will stay attached to the metal surface to form a passivation layer, hence to protect the metal matrix from further corrosion. The chemical corrosion product exists on the metal surface, without any current being generated during the corrosion process. The corrosion is known as chemical corrosion. When metal is exposed to and reacts with the dry gas and nonelectrolyte solution, it will produce corrosion. British usage of stainless steel and inox steel, ngrams shows little difference between the corpuses, and in both cases inox has nearly no usage compared with stainless steel: ![]() Wikipedia includes part of a 1915 New York Times article that refers to "a stainless steel" that is "claimed to be non-rusting, unstainable, and untarishable" which at least partly confutes the "stains less" etymology of stainless steel, which is suggested in the link in the question. For example, after a stainless steel surface is cleaned with steel wool rather than brass wool, it may develop rust stains.Įtymonline gives a 1917 date of origin of the term and says stainless steel is "so called because it is highly resistant to rust or tarnish." Edit: tabulates definitions of stainless steel from a dozen sources, two etymology references, and several audio links. We delivered the fans with balancing reports, material certificates, coating certificates and a sensor function test.Wikipedia says of stainless steel that stainless steel is "also known as inox steel or inox from French inoxydable".Īs is well known, and mentioned in Wikipedia, stainless steel stains less easily and rusts or corrodes less easily, than ordinary steel, but it is not stain-proof and in some conditions can rust or corrode or give such appearance. An FAT test was performed upon delivery, including a running test at maximum RPM. The fan casing is manufactured in three sections for easier transport and is simple to maintain. An IFM EX speed sensor has also been fitted to provide extra protection against overspeed. The fans are also equipped with aluminium cooling fans for extra motor cooling.įinally, two inspection hatches are fitted to the fan casing to allow for regular inspection and cleaning. In addition, these stainless steel centrifugal fans are fitted with a copper-ring shaft seal suitable for ATEX situations and resistant against high temperatures. The Class III stainless steel impeller is fitted with backwards-curved blades, including counter blades on the rear side to create negative pressure at the shaft passage and to reduce dust build-up at the shaft seal. The fans are manufactured to ATEX standard with EX inlet cones suitable for use in Zone 22. The parts that come into contact with the airflow are made of grade 304 stainless steel, and the motor bracket, which is made of normal steel, has a special coating. ![]() ![]() These industrial fans come equipped with a 110kW six-pole WEG motor. For this project, Slingerland supplied eight stainless steel centrifugal ventilators, each with a capacity of 150,000 m3/h at 1200 Pa at 60☌. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |