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Petroleum and petrochemical industry solutions
The necessity of anticorrosion of steel structure of petroleum and petrochemical storage tank
Storage tanks are an indispensable part of the petroleum and petrochemical industry. Storage tanks are used for storage of crude oil, gasoline, diesel, etc. Petroleum products are very dangerous, so the protection of petroleum storage tanks is very important.
Since petroleum substances are solvents, they have strong solubility for general paints, so pay attention to oil resistance when choosing anticorrosive paint solutions for petroleum storage tanks.
Reference system of anticorrosive coating supporting schemes for steel oil storage tanks＞＞
Surface treatment：
1. Sandblasted to Sa2.5 or above, roughness 45~70μm;
2. Steel structure defects caused by welding or spatter, sharp angles, sharp edges, etc. that affect the quality of coating should be removed;
3. The surface to be painted should be free of water, dust and other dirt.
Climate environment：
The ambient humidity should be between 5 and 35℃, and no construction is allowed when it is rainy, foggy, snowy, or when the relative humidity is greater than 80%.
1.1 Painting part: the bottom surface of the tank bottom
| 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 parts: 1.8 meters below the upper surface of the tank bottom plate and the lower part of the tank inner wall (crude oil tank, naphtha tank)
| 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 position: the lower surface of the floating roof + the outer surface of the outer edge plate of the floating roof
| 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 parts: heater outer surface and coil, heater bracket
| Coating structure | Variety of paint | colour | 干膜厚度/μm | 建议涂装道数 |
| 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 Painting parts: the inner surface and internal structure of the floating tank
| 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 parts: the outer surface of the tank wall + the upper 2cm part of the inner surface of the tank wall, the upper surface of the floating roof, the wind-resistant ring, etc.
| 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 part: the outer surface of the volatile oil tank wall
| 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 | Intermediate paint for heat insulation and cooling 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 parts: anti-corrosion on the inner wall of the solvent tank
| 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 part: high-performance coating on the outer wall of the storage tank
| 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 | Agreed | 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 | Agreed | 80 | 2 |
Reference system for maintenance and anti-corrosion coating schemes of steel oil storage tanks＞＞
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Examples of painted parts
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Protection plan
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Road number
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thickness(μm)
|
|
Outer wall of petroleum storage tank
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Surface pretreatment
|
Sandblasting and rust removal reach Sa2.5 level
|
|
|
Epoxy zinc-rich primer
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1
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80-120
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|
|
Epoxy Mica Intermediate Paint
|
1
|
60-80 | |
|
High fluorocarbon topcoat/polyurethane topcoat
|
1
|
80
|
|
Petroleum and petrochemical industry painting case
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Public Security Record No. 32021102000961| Su (tin) dangerous chemical word 02802