Enhanced Protection · 5-8 Years

Telecom Tower Anti-Corrosion Coating Process

For Coastal / High UV Radiation zoneTelecom Tower,with XGE-920 Grey Primer + XGE-922 Acrylic Polyurethane Topcoat (Custom Color) Builds an enhanced 2-coat system.XGE-922 Delivers superior weatherability, UV & salt-spray resistance,Extends service life to 5–8 Years.

SubstrateHot-Dip Galvanized Steel

System2-Coat System

PrimerXGE-920 · Grey

TopcoatXGE-922 · Custom

Service Life5–8 Years

EnvironmentC3–C4 / Coastal / High UV

System Overview

StandardTelecom Towerangle-steel tower,Topcoatusing Custom Navy Blue,Total DFT ≥ 180 μm.

Topcoat XGE-922 Custom · 70–100 μm Primer XGE-920 Grey · 80–100 μm Hot-DipGalvanizingSubstrate

Coating Products

920

XGE-920 Primer

Primer · Excellent adhesion to galvanized surfaces

Color · Grey DFT 80-100 μm Epoxy / Modified Epoxy

922

XGE-922 Topcoat (Custom)

Topcoat · Acrylic Polyurethane · UV / Salt-Spray Resistant

Color · Custom DFT 70-100 μm Acrylic Polyurethane

Customizable

Total DFT

Primer

90 μm

Topcoat

90 μm

Total

≥ 180 μm

Construction Phase Overview

Substrateinspection to final delivery,5-stage closed-loop quality control,Coastal / High UV Environmentexclusive.

Phase 1 · Preparation 01

SubstrateInspection

Verify galvanized layer integrity; mark rust, white rust, and damage areas.

· ISO 1461 Galvanizing · Sharp edge rounding R≥2mm

Phase 2 · Surface Preparation 02

Blast Cleaning Sa 2.5

Oil-free abrasive blasting,Roughness Rz 50–85 μm.

· ISO 8501-1 Sa 2.5 · Oil-free, moisture-free compressed air

Phase 3 · Primer 03

Apply XGE-920

Airless spray 2 coats,Wet Film ~150 μm,Heavy-BuildGreyPrimer.

· DFT 80–100 μm · Recoat interval ≥ 8h / 25°C

Phase 4 · Topcoat 04

Apply XGE-922

Airless spray 2 coats,Acrylic PolyurethaneTopcoat,Custom color available.

· DFT 70–100 μm · Force cure 7d / 25°C

DetailedProcess

9 key steps, 5 quality gates, with rework loops for non-conformance.

flowchart TD Start([Site Survey
Coastal / High UV Environment]) --> S1[1 · SubstrateInspection
Galvanizing + Sharp Edge Rounding R≥2mm] S1 --> Q1{Quality Gate 1
GalvanizingOKYears} Q1 -- No --> R1[Re-Galvanize / Edge Repair] R1 --> S1 Q1 -- Yes --> S2[2 · Surface Preparation
Blast ISO Sa 2.5
Rz 50–85μm] S2 --> S3[3 · Surface Cleaning
oil-free compressed air + Solvent Wipe] S3 --> Q2{Quality Gate 2
Cleanliness / RoughnessOKYears} Q2 -- No --> S2 Q2 -- Yes --> P1[4 · SprayPrimer XGE-920
Grey · 80–100μm · 2 Coat] P1 --> D1[5 · PrimerDrying
25°C × 8h · Forced Ventilation] D1 --> Q3{Quality Gate 3
PrimerDFT + AdhesionYears} Q3 -- No --> P1 Q3 -- Yes --> P2[6 · SprayTopcoat XGE-922
Custom · 70–100μm · 2 Coat] P2 --> D2[7 · TopcoatDrying
25°C × 24h · Force Cure 7d] D2 --> Q4{Quality Gate 4
DFT + Gloss + ColorYears} Q4 -- No --> Fix[Spot Repair] Fix --> Q4 Q4 -- Yes --> S4[8 · Site Touch-Up
Gusset Plates / Bolts / Welds] S4 --> Q5{Quality Gate 5
Final Inspection OKYears} Q5 -- No --> S4 Q5 -- Yes --> End([Delivery · Protection 5-8 Years
UV Resistant / Salt-Spray Resistant]) classDef prep fill:#fbfaf6,stroke:#a8a39a,stroke-width:1.5px,color:#14171e classDef primer fill:#dcdde0,stroke:#6f7177,stroke-width:1.5px,color:#14171e classDef topcoat fill:#d3e1ea,stroke:#1e4d6b,stroke-width:2px,color:#14171e classDef qc fill:#f3e3d0,stroke:#c97b3f,stroke-width:1.5px,color:#14171e classDef end fill:#1e4d6b,stroke:#1e4d6b,stroke-width:2px,color:#ffffff class Start,End end class S1,S2,S3,S4 prep class P1,D1 primer class P2,D2 topcoat class Q1,Q2,Q3,Q4,Q5,Fix qc

SubstratePrep

XGE-920 Primer

XGE-922 Navy Blue Custom

Quality Gate / Repair

Quality Control & Key Parameters

4 upgraded tests vs. Basic (UP): Roughness, Gloss, QUV Aging, Salt Spray.

Galvanizing Thickness ≥ 85 μm
Sharp Edge Rounding R ≥ 2 mm
Blast Cleanliness / Roughness Sa 2.5 · Rz 50–85 μm
EnvironmentTemp/Humidity 10–32°C / RH ≤ 80%
PrimerDFT 80–100 μm
TopcoatDFT 70–100 μm
Adhesion (Cross-Cut) ASTM 0 Rating
Gloss (60°) ≥ 85 GU · High Gloss
Appearance / Color Custom · ΔE ≤ 1.0
QUV Accelerated Aging 1000h · Gloss Retention ≥ 80%
Neutral Salt Spray 1000h · No Blistering

ApplicationEnvironment

EnvironmentTemperature

10–32°C

Relative Humidity

≤ 80%

Dew Point Spread

≥ 5°C

Wind Speed

≤ 3 m/s

Total Coating Thickness

Primer

90 μm

Topcoat

90 μm

Basic vs Enhanced Comparison

sameSubstrate, samePrimer,by onlyTopcoatUpgrade + process enhancement,Extends service life by 60%+.

Basic Protection 3-5 Years

TopcoatXGE-921 Red

ResinSystemPolyurethane

Surface PreparationSweep Blast / Manual

PrimerDFT60–80 μm

TopcoatDFT50–70 μm

Total DFT≥ 140 μm

EnvironmentC3 / Moderate

Enhanced Protection 5-8 Years

TopcoatXGE-922 Custom

ResinSystemAcrylic Polyurethane

Surface PreparationBlast Cleaning Sa 2.5

PrimerDFT80–100 μm

TopcoatDFT70–100 μm

Total DFT≥ 180 μm

EnvironmentC3–C4 / Coastal / High UV

Key Application Notes

Coastal + High UV EnvironmentCriticalControlPoints,extendsSystemProtectionlife.

Coastal / Salt-SprayEnvironmentControl

Within 1 km of coast with required 1000h Neutral Salt Spray,Acceptance after accelerated aging pass.
All welds and bolted joints: Double Coat + Pre-Coat process, DFT +20% above design spec.
Avoid morning fog / post-rain high humidity,Dew Point Spread ≥ 5°C before application.
Topcoatbefore full cure (≥ 7d) No exposureSalt-SprayEnvironment,Temporary shielding around tower base required.

High UV RadiationEnvironmentControl

XGE-922 Acrylic Polyurethane Topcoataliphatic curing,No gloss loss or chalking under long-term exposure.
TopcoatDryForced Ventilation 7d,Ensure full crosslinking before placing into service.
High altitude / low latitude strong UV zones,usingTopcoat (White / Light Grey),Reduce thermal stress.
Visual inspection every 2 years; initiate touch-up protocol when gloss drops >20%.