A spray polyurea anti-corrosion lining system for prepared concrete wastewater tanks, treatment basins, sewage channels and selected collection pits. It helps seal and repair concrete defects before forming a continuous protective lining for wastewater immersion, pH variation, humid corrosive vapor and cleaning exposure after service-chemistry review.
Concrete primer sealing + quartz-sand repair / leveling + spray polyurea main anti-corrosion lining
Concrete pore sealing and adhesion support for prepared wastewater structures
Scrape-applied repair and leveling transition layer for pores, honeycombs, pits and local uneven concrete
Main continuous spray polyurea protective lining for wastewater immersion and corrosion exposure
The system separates concrete pore sealing, local defect repair and main anti-corrosion lining, helping reduce substrate-related defects, lining discontinuity and corrosion risk in prepared concrete wastewater structures.
BW8010 is applied to prepared concrete to seal capillary pores, reduce uneven absorption and support adhesion before repair and main lining work. It helps create a more stable bonding base on porous, dusty or mineral wastewater-structure substrates after proper surface preparation.
BW8010 blended with quartz sand forms a scrape-applied repair and leveling transition layer. It helps fill pores, honeycombs, pits, bug holes and shallow uneven areas before BW3-951 is sprayed, improving surface continuity without replacing the main anti-corrosion lining.
BW3-951 forms the main continuous spray polyurea protective lining over the prepared and repaired concrete surface. This layer helps reduce corrosion and seepage risks from wastewater immersion, pH variation, humid corrosive vapor, cleaning exposure and lining discontinuity around corners, penetrations, inlets, outlets and channels.
Wastewater tank corrosion and lining failure often start from small weak points: porous concrete, honeycombs, bug holes, pits, wall-floor corners, pipe penetrations, inlet and outlet areas, sediment zones, coating discontinuity, humid corrosive vapor, pH variation and cleaning exposure. The BW8010 + BW3-951 system helps reduce these risks through a controlled route from substrate review to primer sealing, local repair and continuous spray polyurea lining formation.
Start with a solid, clean, dry and stable concrete structure before coating work begins. Remove loose concrete, laitance, dust, oil, standing water, weak surface layers and contaminated areas, then review pores, honeycombs, pits, bug holes, cracks, wall-floor corners, pipe penetrations, inlets, outlets and sediment zones before primer application.
Apply BW8010 to seal prepared concrete, reduce surface absorption and support adhesion before local repair and main lining work. Primer coverage, substrate dryness and recoat condition should be controlled so the repair layer and BW3-951 lining are applied over a stable prepared surface.
Use BW8010 blended with quartz sand for pore filling, honeycomb repair, bug-hole treatment, pit repair, scrape leveling and local uneven concrete correction. This repair and leveling transition layer helps prepare a more continuous base before BW3-951 is sprayed, but it should not be treated as the main anti-corrosion lining.
Spray BW3-951 as the main continuous anti-corrosion protective lining over the prepared and repaired concrete surface. The lining should maintain coverage across tank floors, walls, wall-floor corners, pipe penetrations, inlets, outlets, channels and other high-risk details before wastewater service.
System-relevant values for wastewater anti-corrosion lining: concrete adhesion, impermeability, chemical resistance, salt spray and oil-contact review.
| Item | Test standard / reference | Result |
|---|---|---|
| Density g/cm³ | GB/T 6750-2007 | 1.02 |
| Solid content | Product Information | ≥98% |
| Concrete adhesion | ASTM D-3359 | 3.5 MPa or substrate broken |
| Temperature variation | GB/9278-1988 | -40 to +150°C, 24 h: normal |
| Salt resistance | Chemical Resistance | 50 g/L, 30 d: no corrosion, blistering or peeling |
| Alkali resistance | Chemical Resistance | 50% NaOH, 30 d: no corrosion, blistering or peeling |
| Acid resistance | Chemical Resistance | 30% H2SO4 or 10% HCl, 30 d: no corrosion, blistering or peeling |
| Oil resistance | Chemical Resistance | 0# diesel and crude oil, 30 d: no corrosion, blistering or peeling |
| Item | Test standard / reference | Result |
|---|---|---|
| Elongation | GB / T 23446-2009 | 460% |
| Wear resistance | HG/T 3831-2006 | 4.8 mg |
| Tear strength | GB / T 23446-2009 | 80 kN/m |
| Gel time @ 25°C | Product Information | 3-5 s |
| Tensile strength | GB / T 23446-2009 | 20 MPa |
| Concrete adhesion | GB / T 23446-2009 | 3.1 MPa |
| Solid content | Product Information | 100% / 100% |
| Impermeability | GB / T 23446-2009 | 0.4 MPa / 2 h, impermeable |
| Salt spray / oil resistance | Chemical Resistance | Salt spray 2000 h; 0# diesel and crude oil, 30 d |
| Acid / alkali / salt resistance | Chemical Resistance | 10% H2SO4 or 10% HCl, 10% NaOH, 30 g/L salt, 30 d |
The above values are selected from the current product-detail Product Information, Physical Properties and Chemical Resistance tables. Final film thickness and suitability should be confirmed according to substrate condition, service exposure, detail design, project specification and the latest approved technical data sheet. Chemical or water-contact suitability should be confirmed according to actual medium composition, concentration, pH, temperature, contact time, cleaning method and maintenance procedure.
Before wastewater service, key inspection should focus on concrete readiness, BW8010 primer coverage, BW8010 quartz-sand repair quality and BW3-951 lining integrity.
Confirm the wastewater tank, basin or channel before primer application.
Review primer sealing and quartz-sand repair before the main lining is sprayed.
Check the BW3-951 lining before wastewater service.
Use these checks to judge whether the BW8010 + BW3-951 spray polyurea anti-corrosion system is suitable before final specification.
For prepared concrete treatment basins where concrete defects, immersion exposure and corrosive wastewater conditions require anti-corrosion lining review.
For equalization or sedimentation tanks where pH variation, sediment zones, cleaning cycles and corrosive wastewater exposure influence lining selection.
For aeration tanks, channels and flow areas where water movement, humid corrosive vapor, surface wear and continuous lining coverage need project review.
For selected chemical wastewater collection pits where medium type, concentration, temperature, contact time and cleaning method must be reviewed before specification.
Do not finalize material consumption from area alone. Confirm concrete condition, defect depth, repair scope, wastewater composition, pH variation, immersion condition, operating temperature, cleaning chemicals, target DFT, ventilation, inspection standard and maintenance requirements before ordering.
Common questions about using BW8010 and BW3-951 for prepared concrete wastewater tank anti-corrosion protection.
