Corrosion prevention in the petrochemical industry is an absolute lifeline for ensuring its safe, stable, long-term, full-load, and high-quality operation, and its importance and complexity far exceed those of general industrial sectors. This is an industry that elevates corrosion control to the core level of safe production. Due to its importance in corrosion prevention, stable, reliable, and more durable coatings have become the preferred choice.
However, equipment is often exposed to harsh operating conditions such as high humidity, chemical media, mechanical wear, temperature fluctuations, and industrial pollutants. These factors can accelerate corrosion, surface degradation, and structural damage, affecting both performance and service life. Therefore, equipment manufacturers require high-performance coatings with excellent corrosion resistance, wear resistance, and durability to protect critical components and extend equipment lifespan.
Steel Oil Tanks Coating Reference System
Surface Preparation:
1. Blast cleaning to Sa 2.5 (ISO 8501-1) with 45–70 μm profile
2. Remove all welding spatter, sharp edges, and structural defects affecting coating adhesion
3. Ensure surfaces are dry, dust-free, and contaminant-free before coating
Environmental Conditions:
• Ambient temperature: 5–35°C
• Prohibited conditions: Rain, fog, snow, or RH >80%
1.1 Coating Area: Tank Bottom Plate (Underside)
Coating Structure | Variety Of Paint | Colour | Dry Film Thickness/μm | Recommended Number Of Coating Passes |
Primer/bottom surface in one | Epoxy thick build anticorrosive coating | Black | 300 | 3 |
Primer | Inorganic zinc-rich primer around the weld | Grey | 80 | 2 |
1.2 Coating Area: Tank Bottom Plate (Topside) + Lower 1.8m Inner Wall (Crude Oil/Naphtha Tanks)
Coating Structure | Variety /of Paint | Colour | Dry Film Thickness/μm | Recommended Number Of Coating Passes |
Primer | Epoxy primer | Iron oxide red | 120 | 1 |
Topcoat | Solvent-free epoxy anticorrosive coating | Grey | 200 | 1 |
1.3 Coating Area: Floating Roof (Underside) + Outer Edge Plate (Exterior Surface)
Coating Structure | Variety Of Paint | Colour | Dry Film Thickness/μm | Recommended Number Of Coating Passes |
Primer | Epoxy oil resistant, static conductive and anticorrosive paint primer | Red-brown | 150 | 2 |
Topcoat | Epoxy oil resistant, static conductive and anticorrosive paint finish | Light gray | 100 | 1 |
Water-based Solution:
Coating Structure | Variety Of Paint | Colour | Dry Film Thickness/μm | Recommended Number Of Coating Passes |
Primer | Waterborne epoxy graphene oil resistant, static electricity conductive and anticorrosive paint primer | Red-brown | 150 | 3 |
Topcoat | Water-based epoxy mica oil-resistant, static-conducting and anticorrosive paint finish | Light gray | 150 | 3 |
1.4 Coating Area: Heater (Exterior Surface) & Coils / Heater Support Brackets
Coating Structure | Variety Of Paint | Colour | Dry Film Thickness/μm | Recommended Number Of Coating Passes |
Primer | Epoxy silicone heat-resistant primer | Iron oxide red | 150 | 3 |
Topcoat | Epoxy silicone heat-resistant topcoat | Grey | 100 | 2 |
Water-based Solution:
Coating Structure | Variety Of Paint | Colour | Dry Film Thickness/μm | Recommended Number Of Coating Passes |
Primer | Water-based epoxy silicone heat-resistant primer | Iron oxide red | 150 | 3 |
Topcoat | Water-based epoxy silicone heat-resistant topcoat | Grey | 100 | 2 |
1.5 Coating Area: Pontoon (Interior Surface) & Internal Structures
Coating Structure | Variety Of Paint | Colour | Dry Film Thickness/μm | Recommended Number Of Coating Passes |
Primer | Water-based inorganic zinc-rich primer | Grey | 80 | 1 |
1.6 Coating Area: Tank Wall (Exterior Surface) + Upper 2cm Interior / Floating Roof Deck (Topside) / Wind Girders
Coating Structure | Variety Of Paint | Colour | Dry Film Thickness/μm | Recommended Number Of Coating Passes |
Primer | Epoxy zinc-rich primer | Grey | 75 | 1 |
Intermediate paint | Epoxy Mica Intermediate Paint | Grey | 100 | 1 |
Topcoat | Acrylic polyurethane anticorrosive finish | White | 80 | 1 |
Water-based Solution：
Coating Structure | Variety Of Paint | Colour | Dry Film Thickness/μm | Recommended Number Of Coating Passes |
Primer | Waterborne epoxy zinc-rich primer | Grey | 80 | 2 |
Intermediate paint | Waterborne epoxy mica intermediate paint | Grey | 100 | 2 |
Topcoat | Waterborne acrylic polyurethane anticorrosive topcoat | White | 80 | 2 |
1.7 Coating Area: Tank Wall Exterior (Volatile Oil Service)
Coating Structure | Variety Of Paint | Colour | Dry Film Thickness/μm | Recommended Number Of Coating Passes |
Primer | Thermal insulation cooling paint primer | Grey | 60 | 1 |
Intermediate paint | Thermal insulation cooling intermediate paint | White | 90 | 1 |
Topcoat | Thermal insulation cooling paint finish | White | 150 | 2 |
Water-based Solution:
Coating Structure | Variety Of Paint | Colour | Dry Film Thickness/μm | Recommended Number Of Coating Passes |
Primer | Water-based thermal insulation and cooling paint primer | Grey | 100 | 2 |
Intermediate paint | Intermediate paint for water-based thermal insulation and cooling paint | White | 100 | 2 |
Topcoat | Water-based heat insulation and cooling paint finish | White | 100 | 2 |
1.8 Coating Area: Solvent Tank Interior (Corrosion Protection)
Coating Structure | Variety Of Paint | Colour | Dry Film Thickness/μm | Recommended Number Of Coating Passes |
Primer | Inorganic zinc-rich primer | Grey | 120 | 2 |
1.9 Coating Area: Tank Exterior (High-Performance Coating System)
Coating Structure | Variety Of Paint | Colour | Dry Film Thickness/μm | Recommended Number Of Coating Passes |
Primer | Epoxy zinc-rich primer | Grey | 75 | 1 |
Intermediate paint | Epoxy Mica Intermediate Paint | Grey | 100 | 1 |
Topcoat | Fluorocarbon topcoat | Customized | 80 | 1 |
Water-based Solution
Coating Structure | Variety Of Paint | Colour | Dry Film Thickness/μm | Recommended Number Of Coating Passes |
Primer | Waterborne epoxy zinc-rich primer | Grey | 80 | 2 |
Intermediate paint | Waterborne epoxy mica intermediate paint | Grey | 100 | 2 |
Topcoat | Water-based fluorocarbon top coat | Customized | 80 | 2 |
Corrosion Protection and Maintenance Management System for Steel Petroleum Storage Tanks
Examples Of Painted Parts | Protection Plan | Coat No. | Thickness(μm) |
Outer wall of petroleum storage tank | Surface pretreatment | Sandblasting and rust removal reach Sa2.5 level | |
Epoxy zinc-rich primer | 1 | 80-120 | |
Epoxy Mica Intermediate Paint | 1 | 60-80 | |
High fluorocarbon topcoat/polyurethane topcoat | 1 | 80 | |
