Pulp & Paper Coating & Repair Services

Drive and feed rollers lose their grip as the cover glazes, wears, or tears. Slip and mistracking follow, and throughput drops. AAS resurfaces rollers cold with a high-grip elastomer that rebuilds the friction profile. The roller goes back into the drive without a trip out for OEM re-covering. Pumps and fans erode the same way. Particle-laden flow strips metal off impellers, blades, and housings until clearances open and efficiency falls off. We rebuild the lost metal and recoat the wear surfaces with ceramic-filled coatings sized to the duty. The part returns to service running closer to its design point, and the rebuild happens in the maintenance window instead of waiting on a casting.

Where flow-induced metal loss and chemical attack stack on top of each other, fresh steel keeps getting exposed and eaten. AAS coats those surfaces with systems rated for the combined erosion and chemical load, holding both failure modes back in a single cold-applied recoat.

Kraft digesters carry hot sulfate-rich liquor that thins linings and corrodes welds and access ports over a campaign. AAS applies a high-temperature immersion lining matched to the service and overlays the spots where acids drive the failure. There is no liner-replacement weld cycle and no plate swap. Evaporators, de-aerators, and autoclaves run hot and wet, which breaks down ordinary coatings and corrodes the shell at welds and tube zones. We line them with an immersion-grade system rated for the service temperature, applied cold during the outage.

Scrubbers and absorber towers take acidic condensate and wet chemical attack that thin shell steel at the internals and liquid distribution zones. AAS lines the tower interior with a chemical-resistant cold-cure system and recoats it during the scheduled outage without hot work. Belzona high-temperature and acid-resistant series back this lining work. The result the mill cares about is a vessel that finishes the next campaign instead of coming out early.

Bulk material sliding through chutes, hoppers, silos, and mill liners wears them out faster than any replacement cycle can keep up with. AAS lines these surfaces with cold-applied ceramic-filled coatings sized to the particle and the flow. The lining recoats in the maintenance window and stretches plate life well past where bare steel would quit. Rubber linings also strip off chutes, hoppers, and slurry equipment. We rebuild them cold on site, so the mill gets its abrasion protection back without pulling the part for re-lining.

Conveyor belts gouge, rip, and wear through their top covers, spilling cargo and threatening to stop the line. AAS rebuilds the damaged area cold with a flexible elastomer that bonds to the existing rubber. The belt runs again without a splice or a full replacement. Where wear plates and bars sit on irregular backing, steel shims leave point contact that distorts the plate within a shift. We pour a cold-cure compound that fills the gap and transfers load across the full area, seating the plate flat without machining the structure.

The throughline is uptime. Worn rollers regain their grip, and eroded pumps and fans run closer to spec. Lined vessels finish their campaigns, and torn belts and rubber go back to work without a replacement order. Almost none of it requires cutting, welding, or hot-work permits inside a running mill.

AAS schedules around your outage, mobilizes from Baton Rouge, and runs surface prep, repair, coating, and lining as one field package. When a roller cover lets go between turnarounds or a digester needs attention out of cycle, the 24-hour on-call crew gets the equipment back into the line.