The surface temperature of metal oil and natural gas tanks can rise up to 20 °C or more under sunlight, triggering oil volatilisation and pressure rise. Coatings need to be synchronised to meet the needs:

 Anti-corrosion: to block water vapour and salt spray; 
 Reflective: to reflect solar radiation and reduce surface temperature; 
 Thermal insulation: to reduce heat conduction.

    Aluminium Silver Paste Selection Logic 
 | Type | Aluminium Content | Floating Power | Particle Size D50 | Functional Position | Coating Position | 
 | ------------ | -------- | -------- | --------- | ------------------------ | ------------ | 
 | Floating Type | ≥65 % | ≥90 % | 10-15 μm | Mirror Type 10-15 μm | Mirror reflection, heat insulation | Topcoat | 
 | Non-floating | 55-60 %| - | 5-12 μm | Shielding corrosive media, enhanced adhesion | Primer/Intermediate | 
 Recommended Manufacturer: Silver Rocket Aluminium Silver Paste

    Floating type: high floating power stearic acid coating, gloss ≥85 GU, solar reflection ratio ≥0.8. 
 Non-floating type: universal epoxy/fluorocarbon system, salt spray resistance ≥1000 h, good compatibility with zinc powder primer.

    Typical coating structure

    Epoxy zinc-rich primer 60 μm 
 Silver Rocket non-floating aluminium silver paste middle coating 40 μm 
 Silver Rocket floating aluminium silver paste top coat 35 μm 

 Total thickness ≥135 μm, meets the corrosion resistance grade of ISO 12944 C5-M, and the temperature rise of the surface is reduced by 15-20 ℃.

    Environmental Trends 
 Silver Rocket Waterborne Aluminium Silver Paste (silane-coated) VOC≤50 g/L, no hydrogen precipitation at 50 ℃/30 d, can directly replace solvent-based products, in line with GB 38507-2020.

Conclusion 
The two-layer aluminium-silver paste system ‘Silver Arrow non-floating primer + Silver Arrow floating topcoat’ is preferred for the protection of storage tanks, taking into account the long-lasting anticorrosion and high reflective heat insulation.