Chemical & Corrosion Resistant Coatings

DY-13

High-Temperature Flue-Gas Anti-Corrosion Coating

Q: What is flue gas corrosion?

It is corrosion associated with gas-path constituents, deposits and condensate acting on equipment surfaces. Temperature changes and wet–dry conditions can alter the exposure.

Q: What is sulfuric acid dew point corrosion?

It is corrosion that can occur when sulfur-containing flue gas forms acidic condensate on a surface below the relevant condensation condition. Actual gas and temperature data are required.

Q: Why do flues, scrubbers and gas-treatment equipment corrode?

Acidic condensate, deposits, wash water, temperature gradients, particle erosion and substrate defects can interact. Inspection should identify the local mechanism before a coating system is selected.

Flue-gas corrosion protection coating for compatible scrubbers, desulfurization equipment, chimneys, flues and gas-path surfaces exposed to acidic condensate.

Technical parameters Contact technical team

DY-13 flue-gas anti-corrosion coating package

Flue Gas Corrosion Protection

DY-13 is a flue gas corrosion protection coating for compatible scrubbers, desulfurization equipment, chimneys, flue ducts and other gas-path surfaces exposed to acidic condensate and process deposits. It is intended for environments where chemical attack may combine with particle erosion and changing wet or dry conditions. Sulfuric acid dew point corrosion can develop when gas-path surfaces fall into a condensation regime, so gas composition, operating temperature, shutdown conditions and local cold spots must be reviewed. Selection should also confirm substrate, existing lining, chemical concentration, washing exposure and access for surface preparation. General tank or process-chemical service should be compared with DY-14 rather than grouped under the same primary intent.

A two-component phenolic-modified epoxy system with silicon carbide, ceramic powder, graphite and corrosion-inhibiting fillers for flue-gas equipment and process surfaces.

Problems addressed

Sulfuric-acid dew-point corrosionAcidic flue-gas corrosionParticle erosion combined with chemical attack

Sulfuric Acid Dew Point Corrosion

When this product direction fits

Barrier protection for compatible substrates exposed to identified acids, alkalis, salts or process chemicals.

How this system differs

Selection requires the actual chemical, concentration, exposure mode, substrate and temperature; a generic corrosion label is not sufficient.

What must be confirmed

Suitability depends on the actual substrate, medium, concentration, temperature cycle, exposure mode and application window. Final system selection and project-specific instructions require technical review.

DY-13 or DY-14?

DY-13 owns flue-gas, acidic-condensate and gas-treatment corrosion intent. DY-14 addresses identified acids, alkalis and process media in compatible tanks, pipelines and scrubbers. Confirm the exposure mechanism.

Compare DY-14 chemical-resistant coating

Product features and advantages

Dense chemical barrier

Acid and alkali resistance

Adhesion to multiple compatible substrate types

Wear resistance from ceramic and graphite fillers

Typical application context

Scrubber, FGD and Flue Applications

Power & Energy · Chemical & Fertilizer · Petrochemical & Refining: application review for Desulfurization tower · Scrubber · Cooling tower.

Barrier protection for compatible substrates exposed to identified acids, alkalis, salts or process chemicals. Confirm the substrate, exposure and maintenance access before final selection.

Suitable equipment

Desulfurization towerScrubberCooling towerChimney and flueProcess tank

Industries

Power & Energy

Chemical & Fertilizer

Petrochemical & Refining

Steel

Substrates and areas

Metal · Concrete · Brickwork · Compatible FRP and ceramic surfaces

Operating conditions

Dry heat ≤250°C; source states 280°C limit · Wet heat or immersion ≤200°C · Identified acidic media

DY-13

Technical parameters

Only values available in the reviewed product source are shown.

Technical parametersValueSource

Mixing Ratio9:1 by weight (base:hardener)

Pot Life5-8 h

Recommended Dry Film Thickness70 μm in application section

Theoretical Coverage0.16 kg/m² at 70 μm

Touch Dry Time<2 h

Hard Dry Time24 h

Full Cure Time10 days

AppearanceGrey, matt and smoothFactory test

Density1.8 g/mlFactory test

Product Table Coverage2.0-2.5 m²/kg at 200 μmFactory test

Fineness≤80 μmGB/T 1724

Viscosity50-60 s at 25°C (No. 4 cup)GB/T 1723

Solid Content75%GB/T 1725

AdhesionGrade 1GB/T 1720

Impact Resistance4.0 JGB/T 1732

Hardness7HGB/T 6739

Salt Spray Resistance1000 h; no cracking, rust spots or blisteringGB/T 1771

Chemical Resistance10% H₂SO₄ 30 d; 10% NaOH 30 d; 3% NaCl 30 d; film intact and unchangedGB/T 1763

Application Section Coverage0.16 kg/m² at 70 μm dry film thicknessProduct source

Acidic Condensate and Corrosion Control

Confirm substrate condition, contamination, corrosion, defects and access before work starts.

Remove oil, dust and loose material; prepare cleanliness and profile to the reviewed product procedure.

Check compatibility of retained coatings and complete a representative trial area when the existing system is uncertain.

Prepare and mix only according to the product source; do not improvise ratio, thinner or pot life.

Build a continuous system in controlled layers, with special attention to edges, welds, joints and shadow zones.

Protect the applied area through curing, then inspect continuity, visible defects and recorded source-backed acceptance items.

Source-specific procedure

Surface Preparation

Abrasive blast to Sa 2.5 with 30-60 μm roughness; local repair to St 3.

Application Environment

5-60°C; relative humidity ≤85%; substrate ≥3°C above dew point.

Mixing

Mix base and hardener at 9:1 by weight for 3-5 minutes.

Application Tools

Brush, roller, air spray or airless spray.

Curing

Touch dry <2 h, hard dry 24 h, full cure 10 days.

Precautions

Confirm gas composition, chemical medium, concentration, temperature and condensation conditions before selection.

Packaging, storage and transport

PackagingTwo-component, 20 kg/pail

StorageDry, cool area away from sunlight, heat and ignition sources; 5-40°C

Shelf Life12 months unopened

TransportMaintain 5-40°C

Official product source: High-temperature flue-gas anti-corrosion coating / DY-13 source document

Quality checks

Check surface-preparation records, environmental conditions, layer continuity, edges, welds and visible defects. Use only acceptance criteria stated in the reviewed product or project documents.

Maintenance and repair

Inspect representative high-risk locations during planned maintenance. Clean the area, identify the cause of damage, feather sound edges and verify compatibility before local repair.

Scope and limitations

Technical documents

Documents for project evaluation

TDS, SDS, MSDS, test reports and other project-related technical documents are available based on specific project requirements. Please contact us through WhatsApp.

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Frequently Asked Questions

What is flue gas corrosion?

It is corrosion associated with gas-path constituents, deposits and condensate acting on equipment surfaces. Temperature changes and wet–dry conditions can alter the exposure.

What is sulfuric acid dew point corrosion?

It is corrosion that can occur when sulfur-containing flue gas forms acidic condensate on a surface below the relevant condensation condition. Actual gas and temperature data are required.

Why do flues, scrubbers and gas-treatment equipment corrode?

Acidic condensate, deposits, wash water, temperature gradients, particle erosion and substrate defects can interact. Inspection should identify the local mechanism before a coating system is selected.