Complaint
STWD8008 two component cathodic disbonding metal special polyurea primer takes polyurea polyurethane resin and polymers as main material, refined with special formulation and scientific production process. The coating film is dense, tough, with high infiltration and shielding performance, excellent cathodic disbonding performance and anti-rust, anticorrosion waterproof properties. The coating film has high adhesive strength with metal substrate and be compatible with the following coating film.
Product features and advantages
* greatly increase the adhesive strength with metal substrate
* excellent anticorrosion and wear resistance
* excellent cathodic disbonding resistance
* excellent waterproof & moisture resistance
* stable resistance to temperature change
* compatible with the following coating film
* avoid rust and corrosion and increase the service life
* high coverage rate to save cost
Application scopes Anticorrosion coating for any metal structures, stainless steel, aluminum surface. Low surface treatment with rust on metal structure.
Product information
| Item | A component | B component |
| Appearance | light yellow liquid | color adjustable |
| Specific gravity(g/m³) | 1.03 | 1.25 |
| Viscosity (cps)@25ºC | 210 | 380 |
| Solid content (%) | >65% | >65% |
| Mix ratio (by weight) | 1 | 1 |
| Surface dry time (h) | 1-3h | |
| Recoating interval (h) | Min 3 h; max 24h (20ºC) | |
| Theoretical coverage (DFT) | 0.12kg/m2 film thickness 50μm | |
| Item | Test standard | Results |
| Tensile strength (dry metal surface) Mpa | ASTM D-3359 | 11.5 ( or substrate broken) |
| Impact resistance (kg.cm) | GB/T 1732 | 60 |
| Abrasion resistance (750g/500r) mg | GB/T 1732 | 11 |
| Temperature variation resistance (-40+180ºC) 24h | GB/9278-1988 | Normal |
| Cathodic disbonding resistance [1.5v,(65±5)ºC, 48h] | HG/T 3831-2006 | ≤15mm |
| Density g/cm3 | GB/T 6750-2007 | 1.08 |
| Acid resistance 50%H2SO4 or 15%HCI,30d | no rust, no bubbles, no peel off |
| Alkali resistance 50%NaOH, 30d | no rust, no bubbles, no peel off |
| Salt resistance 60g/L, 30d | no rust, no bubbles, no peel off |
| Salt spray resistance 1000h | no rust, no bubbles, no peel off |
| Oil resistance, 0# diesel, oil, 30d | no rust, no bubbles, no peel off |
| (For reference: Pay attention to the influence of ventilation, splash and spillage. Independent immersion testing is recommended if requires other specific data) | |
Application environment
Environment temperature: -5 ~+ 35ºC
Relative humidity: RH%: 35-85%
Dew point: ≥3ºC
Application guide
Recommend dft: 30-50μm
Recoating interval time: 3-24h
Recommended coating method: brush, roller, airless spray, air spray
