Impact of Internal Pipe Corrosion

As a specialist stainless steel pipe and fittings supplier in China, we can assure you:
Internal Pipe Corrosion poses a severe,often hidden threat to industrial systems globally.This degradation mechanism destroys the integrity of Stainless steel pipes.Furthermore,it compromises the safety and function of stainless steel pipe fittings.Understanding the various forms of internal corrosion is crucial.It ensures the longevity and safety of critical infrastructure.

What is Internal Pipe Corrosion?

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.

What We Do

Plate
Sheet
Forgings
Round Bar

Flange
Pipes
Fittings
Customized

The Most Dangerous Forms of Internal Pipe Corrosion

Pitting Corrosion

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 duplex stainless steel pipe.

Crevice Corrosion

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.

Stress Corrosion Cracking

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.

Intergranular Corrosion

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.

Atmospheric Corrosion (External Contrast)

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.

Get Free Fast Quote

KAYSUNS offers package solutions for piping materials such as Pipes, Fittings, Flanges, Valves, Plates, Forgings, Ingots of Stainless Steel, Duplex and Alloy Steels, all kinds of Fasteners (Bolts, Nuts, Flat Washers, Bullet Washers) and other products. We accept customized service for our products and some of them can be supplied in small quantities. If you have any questions about our company and products, please feel free to contact us.

Get QUOTE