Impact de la corrosion interne des tuyaux

As a specialist stainless steel pipe and fittings supplier in China, we can assure you:
Corrosion interne des tuyaux représente une menace grave, souvent cachée, pour les systèmes industriels à l'échelle mondiale. Ce mécanisme de dégradation détruit l'intégrité de Tuyaux en acier inoxydable. De plus, cela compromet la sécurité et le fonctionnement de raccords de tuyauterie en acier inoxydable.Il est essentiel de comprendre les différentes formes de corrosion interne. Cela garantit la longévité et la sécurité des infrastructures critiques.

Qu'est-ce que la corrosion interne des tuyaux ?

Internal corrosion occurs on the inside surface of a pipe.The corrosion happens when the transported fluid chemically attacks the metal wall.Even stainless steel,with its protective layer,is vulnerable.This vulnerability arises when specific corrosive elements are present.These elements destroy the passive chromium oxide film.

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Les formes les plus dangereuses de corrosion interne des tuyaux

Corrosion par piqûres

Pitting corrosion is highly localized and very aggressive.Small,deep holes form on the metal surface.These pits are hard to detect visually from the outside.They can quickly lead to perforation and leakage.The susceptibility of an alloy to this attack is measured by its PREN value.A lower PREN means higher risk.For example,testing is often done to assess the Pitting corrosion of tuyau en acier inoxydable duplex.

Corrosion par crevasses

Crevice corrosion occurs in confined spaces.These spaces are often found under gaskets or flange faces.Fluid stagnation allows chlorides to concentrate heavily.This creates an extremely acidic environment locally.The corrosion rate inside the crevice accelerates rapidly.Engineers perform a test of crevice corrosion to validate material selection.Furthermore,the critical pitting corrosion temperature is a key factor.If the operating temperature exceeds this value, pitting risk dramatically increases.

Fissuration par corrosion sous contrainte

SCC is a catastrophic failure mechanism.It requires three conditions simultaneously:susceptible material,tensile stress and corrosive environments.SCC produces fine cracks that grow perpendicular to the stress direction.These failures are often sudden and happen without warning.You can find more detail on this topic in articles discussing stress corrosion cracking in stainless alloys.

Corrosion intergranulaire

This corrosion form attacks the grain boundaries of the metal structure.It is most often caused by improper welding procedures.Welding heat can cause the precipitation of chromium carbides.This process,known as sensitization,leaves the material vulnerable.The resulting damage destroys the material’s strength along the grain boundaries.For more information,read our guide on intergranular corrosion.

Corrosion atmosphérique (contraste externe)

While Internal Pipe Corrosion is our primary focus,external threats exist.Atmospheric corrosion primarily attacks the outer pipe surface.It results from exposure to moisture and airborne contaminants.Proper coating and insulation prevent this external damage.However,internal threats remain the greater danger to system integrity.

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KAYSUNS propose des solutions globales pour les matériaux de tuyauterie tels que les tuyaux, les raccords, les brides, les vannes, les plaques, les pièces forgées, les lingots d'acier inoxydable, d'acier duplex et d'acier allié, toutes sortes d'éléments de fixation (boulons, écrous, rondelles plates, rondelles bombées) et d'autres produits. Nous acceptons un service personnalisé pour nos produits et certains d'entre eux peuvent être fournis en petites quantités. Si vous avez des questions sur notre société et nos produits, n'hésitez pas à nous contacter.

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