Corrosion atmospheric
Chemical corrosion
ISO 12944 C1->CX
Industrial corrosion protection: diagnose, size, secure
Corrosion is not a subject to be taken lightly: it represents both a technical and economic risk . At Xtrem Coatings , we help you choose the right level of protection depending on the environment (atmosphere, immersion, chemical), and then apply the solution using an industrial methodology and rigorous controls.
Objective: to reduce downtime , increase equipment lifespan and limit maintenance costs, by selecting the appropriate protection (lamellar zinc, industrial paints, fluoropolymers, multilayer systems…).
📍 Valenciennes / Onnaing
🧰 Pieces up to 12 m (depending on geometry)
Before/After in our workshops
🧪 Solutions: atmospheric & chemical
The main types of corrosion
Identifying the mechanism is the first step in choosing effective protection (and avoiding bad solutions).
Atmospheric corrosion
Humidity, dry/humid cycles, pollution, salt spray. Typical: exposed structures, frames, fixings.
Outdoor/Marine Exhibition
Industrial atmospheres
Condensation / confined spaces
Chemical corrosion
Attack by acids, bases, solvents, process immersion. Typical: tanks, reactors, piping, pumps.
Immersion / Splashing
Temperature and concentration
Mechanical stresses (abrasion)
Galvanic corrosion
Couple between different metals in the presence of electrolyte. Typical: assemblies, fixings, interfaces.
Material choices
Electrical insulation / barriers
Couples management
Stress corrosion
Interaction of mechanical stresses + corrosive environment (cracking). Typical: loaded parts, welded areas.
Design / constraints
Coating selection + preparation
Controls and monitoring
Erosion-corrosion
Mechanical wear due to flow + corrosion (turbulence, particles). Typical: pumping, agitation, jet areas.
Barrier + abrasion resistance
Thick reinforcement
Optimization of critical areas
Localized corrosion
Pitting, crevices, under-deposits. Typical: confined areas, joints, stagnation.
Preparation & sealing
Multilayer system selection
Design and drainage
Example of atmospheric corrosion on an exposed metal part
Chemical corrosion – equipment in contact with acid/base
Corrosivity classes ISO 12944: C1 to C5 and CX
Use this scale to describe the environment. We will then help you choose the protection system and thickness.
Simplified diagram – exposure levels
to be adapted according to your context
Weak
Very severe
C1
Dry interior
Offices, heated premises
C2
Low humidity. Warehouses, dry workshops.
C3
Urban/industrial, moderate humidity
C4
Severe industrial; Coastal, low salinity
C5
Very severe Offshore / industrial
CX
Extreme
Offshore splash zone: Highly aggressive environments
Indicative diagram (ISO 12944). System selection also depends on expected service life, surface preparation, and maintenance.
Do you know your class (C3, C4…)?
Send us the class + the type of part + the desired protection duration: we will propose a coherent system (layers, thicknesses, preparation).
Our anti-corrosion solutions
We choose the protection according to the corrosion mechanism, the criticality of the part, the exposure and the process constraints.
Atmospheric protection
For structures, chassis, fixings, exposed parts (C2 to CX as appropriate).
Lamellar zinc (e.g., Geomet®)
Industrial paints / multi-layer systems
Preparation and appropriate masking
Chemical protection
For immersion, acids/bases/solvents and aggressive environments.
Fluoropolymers: Halar® (ECTFE), PTFE, PFA
Thickness solutions (as needed)
Chemical sizing + temperature
“Mechanical + corrosion” protection
When abrasion / shocks / turbulence are added to corrosion.
Material selection for abrasion resistance
Reinforcement of critical areas
Suitable thicknesses & controls
Atmospheric corrosion protection – zinc flake / industrial paint
Chemical corrosion protection – fluoropolymer coating (Halar/PTFE/PFA)
Our methodology
Lasting protection depends as much on preparation and controls as on the product itself. We frame, apply, and monitor.
1. Diagnosis
Type of corrosion, environmental class (ISO 12944), constraints, target duration, maintenance.
2. System selection
Technology(s), layers, thicknesses, critical points, quality requirements.
3. Surface preparation
Sandblasting / preparation adapted to the substrate to guarantee adhesion and hold.
4. Application & Controls
Controlled application + thickness control/inspection. Traceability as needed.
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In our workshops: resources, processes, rigor and control.
Large rooms?
We handle parts up to 12m (depending on geometry). Send us your plan and photos, and we'll review your case.
FAQ – Frequently Asked Questions
The points that come up most often on the engineering/maintenance/purchasing side.
Request a technical study / a quote
Describe your environment and your room: we offer you a coherent anti-corrosion solution (system, thicknesses, preparation), with a technical and sustainability- oriented approach.
Contact : online form
Need a quick opinion?
Simply send us: class (if known) + 2 photos + dimensions. We will then provide you with technical guidance.