Corrosion

definition
Corrosion is the natural process where metals deteriorate through chemical or electrochemical reactions with their environment. The most common form is rusting of steel caused by oxygen and moisture.

Where does corrosion occur?

Corrosion affects every steel asset exposed to harsh conditions, such as:

• Oil & Gas – pipelines, storage tanks, offshore platforms.
• Petrochemical & Chemical plants – reactors, vessels and piping systems.
• Marine & Offshore wind – ship hulls, ballast tanks, turbine foundations.
• Infrastructure & Energy – bridges, cranes, power plants and steel frameworks.

For you as an asset owner, corrosion means loss of structural integrity, safety risks and high maintenance costs if not managed properly.

Extra explanation and types

Common types of corrosion include:

• Uniform corrosion – even thinning across the surface.
• Pitting corrosion – small, deep holes in the metal.
• Crevice corrosion – damage in shielded areas, e.g. under gaskets.
• Galvanic corrosion – between two dissimilar metals.
• CUI (Corrosion Under Insulation) – hidden under insulation, often in petrochemical and offshore assets.

Preventing corrosion requires:

• Proper surface preparation – achieving Sa 2½ and correct micron roughness.
• Protective coatings – epoxies, polyurethanes or polymeric membranes.
• Regular inspections and maintenance.

Pinovo and corrosion control

Pinovo’s dust-free blasting helps you fight corrosion by:

• Removing rust and failed coatings safely and efficiently.
• Achieving the right cleanliness and roughness for coating adhesion.
• Working in ATEX zones without shutdowns.
• Preventing environmental impact during corrosion removal.